- dovecot - dovecot.org

Block insecure connections
by Andrea Gabellini 09 Aug '21

09 Aug '21

Hello, I am writing for advice on how to deal with a problem. I have a Dovecot Proxy/Director -> Backend installation, all with version 2.3 Encryption on POP3 / IMAP connections is currently optional. I would like to set it as mandatory but despite the numerous reminders many users have not taken steps to adapt. Setting it as mandatory would mean having too many calls to support. I would therefore like to block the connection to only some of them and slowly reach my target. I can't find how and where to fit in to be able to do such a thing. At first I thought about postlogin, but the user ended up on a proxy and I can't use it. I tried to use the forwarding function on the proxy and postlogin on the backend, but I didn't succeed in the first part. In pseudo code, I would like to do this: if connection is not secured { if user is in my list { block the connection; } } Thanks in advance for any suggestions, Andrea -- __________________________ People says "more memory increases the computerspeed" and they are right: More memory Windows detects, the sooner it crashes. __________________________ TIM San Marino S.p.A. Andrea Gabellini Engineering R&D TIM San Marino S.p.A. - https://www.telecomitalia.sm Via Ventotto Luglio, 212 - Piano -2 47893 - Borgo Maggiore - Republic of San Marino Tel: (+378) 0549 886237 Fax: (+378) 0549 886188 -- Informativa Privacy Questa email ha per destinatari dei contatti presenti negli archivi di TIM San Marino S.p.A.. Tutte le informazioni vengono trattate e tutelate nel rispetto della normativa vigente sulla protezione dei dati personali (Reg. EU 2016/679). Per richiedere informazioni e/o variazioni e/o la cancellazione dei vostri dati presenti nei nostri archivi potete inviare una email a privacy(a)telecomitalia.sm. Avviso di Riservatezza Il contenuto di questa e-mail e degli eventuali allegati e' strettamente confidenziale e destinato alla/e persona/e a cui e' indirizzato. Se avete ricevuto per errore questa e-mail, vi preghiamo di segnalarcelo immediatamente e di cancellarla dal vostro computer. E' fatto divieto di copiare e divulgare il contenuto di questa e-mail. Ogni utilizzo abusivo delle informazioni qui contenute da parte di persone terze o comunque non indicate nella presente e-mail potra' essere perseguito ai sensi di legge.

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doveadm pw
by Doug Hardie 07 Aug '21

07 Aug '21

mail# doveadm pw Enter new password: Retype new password: {CRYPT}$2y$05$oSB6end9V.YumJMzON7lfeOL9N8TXK6jhYqjHOEnPd1NLZ9.QNaTy I thought the default was supposed to be CRAM-MD5. I don't find anywhere I have entered CRYPT. There is one reference to it in auth-passwdfile.conf.ext, but changing that has no effect. Is this a bug, change, or my mistake? Thanks, mail# doveconf -n # 2.3.15 (0503334ab1): /usr/local/etc/dovecot/dovecot.conf # Pigeonhole version 0.5.15 (e6a84e31) # OS: FreeBSD 13.0-RELEASE-p1 amd64 ufs # Hostname: mail auth_mechanisms = plain cram-md5 auth_stats = yes base_dir = /var/run/home_mail/ first_valid_gid = 0 lda_mailbox_autocreate = yes login_log_format_elements = user=<%u> method=%m rip=%r lip=%l mpid=%e %c %k session=<%{session}> port=%a mail_gid = 2222 mail_home = /var/mail/home_mail/%n mail_location = maildir:/var/mail/home_mail/%n/Maildir mail_log_prefix = "%s(%u)[%r]<%{session}>: " mail_uid = 2222 managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date index ihave duplicate mime foreverypart extracttext namespace inbox { inbox = yes location = mailbox Drafts { autoexpunge = 5 days special_use = \Drafts } mailbox Junk { autoexpunge = 2 days special_use = \Junk } mailbox Sent { autoexpunge = 1 weeks special_use = \Sent } mailbox "Sent Messages" { autoexpunge = 2 days special_use = \Sent } mailbox Trash { autoexpunge = 2 days special_use = \Trash } prefix = } passdb { args = scheme=CRYPT username_format=%n /usr/local/etc/dovecot/users driver = passwd-file } plugin { mail_log_events = delete undelete expunge copy mailbox_delete mailbox_rename mail_log_fields = uid box msgid size from sieve = file:/var/mail/home_mail/%n/sieve;active=/var/mail/home_mail/%n/.dovecot.sieve stats_refresh = 30 secs stats_track_cmds = yes } postmaster_address = doug(a)sermon-archive.info protocols = imap service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0660 user = postfix } unix_listener auth-userdb { group = vmail mode = 0666 user = vmail } } service imap-login { inet_listener imap { port = 143 } inet_listener imaps { port = 993 ssl = yes } inet_listener imaps2 { port = 998 ssl = yes } } service stats { unix_listener stats-reader { group = vmail mode = 0660 user = vmail } unix_listener stats-writer { group = vmail mode = 0660 user = vmail } } ssl_cert = </etc/ssl/certs/mail.pem ssl_dh = # hidden, use -P to show it ssl_key = # hidden, use -P to show it syslog_facility = local0 userdb { args = home=/var/mail/home_mail/%d/%n allow_all_users=yes driver = static } verbose_proctitle = yes protocol lda { mail_plugins = " sieve" } protocol imap { mail_plugins = " mail_log notify" } protocol pop3 { mail_plugins = " mail_log notify" } -- Doug

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Dovecot GSSAPI Authentication problem
by Lucas Castro 06 Aug '21

06 Aug '21

Hello, I'm getting problem to setup dovecot imap/pop service authentication through Kerberos. Already read https://wiki.dovecot.org/Authentication/Kerberos. My guess is kerberos is working but something goes wrong after. The keytab and ticket ( for ldap userdb lookup ) -rw------- 1 dovecot dovecot 498 ago 3 20:20 /etc/dovecot/imap.keytab -rw------- 1 dovecot root 1503 ago 4 11:40 /etc/dovecot/imap.ticket dovecot --version 2.3.13 (89f716dc2) the dovecot setting # 2.3.13 (89f716dc2): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.13 (cdd19fe3) # OS: Linux 5.10.0-7-amd64 x86_64 Debian 11.0 # Hostname: postfix10.zw.local auth_gssapi_hostname = $ALL auth_krb5_keytab = /etc/dovecot/imap.keytab auth_mechanisms = gssapi auth_username_translation = /@ import_environment = TZ KRB5CCNAME=/etc/dovecot/imap.ticket KRB5_KTNAME=/etc/dovecot/imap.keytab mail_gid = 5000 mail_home = /var/mail/virtual/%d/%n mail_location = maildir:~/mail mail_privileged_group = mail mail_uid = 5000 namespace inbox { disabled = no inbox = yes list = yes location = mailbox Drafts { special_use = \Drafts } mailbox Junk { special_use = \Junk } mailbox Sent { special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Trash { special_use = \Trash } prefix = type = private } protocols = " imap lmtp pop3" service lmtp { unix_listener /var/spool/postfix/private/dovecot-lmtp { group = postfix mode = 0600 user = postfix } } ssl_cert = </etc/dovecot/private/dovecot.pem ssl_client_ca_dir = /etc/ssl/certs ssl_dh = # hidden, use -P to show it ssl_key = # hidden, use -P to show it userdb { args = /etc/dovecot/dovecot-ldap.conf.ext driver = ldap } protocol lmtp { postmaster_address = postmaster(a)zw.local } When I launch Thunderbird, mail log raise this Aug 4 13:42:23 postfix10 dovecot: auth: Debug: client in: AUTH#0111#011GSSAPI#011service=pop3#011session=Q3GdfL7IvLmsEAAs#011lip=10.16.0.220#011rip=172.16.0.44#011lport=110#011rport=47548 Aug 4 13:42:23 postfix10 dovecot: auth: Debug: gssapi(?,172.16.0.44,<Q3GdfL7IvLmsEAAs>): Using all keytab entries Aug 4 13:42:23 postfix10 dovecot: auth: Debug: client passdb out: CONT#0111#011 Aug 4 13:42:23 postfix10 dovecot: auth: Debug: client in: CONT<hidden> Aug 4 13:42:23 postfix10 dovecot: auth: Debug: gssapi(user0(a)zw.local,172.16.0.44,<Q3GdfL7IvLmsEAAs>): security context state completed. Aug 4 13:42:23 postfix10 dovecot: auth: Debug: client passdb out: CONT#0111#011YIGZBgkqhkiG9xIBAgICAG+BiTCBhqADAgEFoQMCAQ+iejB4oAMCARKicQRvsoco75BA/W0B9tS+UmJnunUg6vIcO5wr0fzZ7iGmCpsz0K2vL/qniGISDIwF9hDXXxs79bljbZE8Yx4dujqVuTPGMtewfhDtNfRNgYGNk/z28sDz7fs/dpIMKF2FAA1m9pFjBupQ1VkGbzMYc77U Aug 4 13:42:23 postfix10 dovecot: auth: Debug: client in: CONT<hidden> Aug 4 13:42:23 postfix10 dovecot: auth: Debug: gssapi(user0(a)zw.local,172.16.0.44,<Q3GdfL7IvLmsEAAs>): Negotiated security layer Aug 4 13:42:23 postfix10 dovecot: auth: Debug: client passdb out: CONT#0111#011BQQF/wAMAAAAAAAAAdf8bQH///86U2L5ErmqfWFYNQA= Aug 4 13:42:23 postfix10 dovecot: auth: Debug: client in: CONT<hidden> Aug 4 13:42:23 postfix10 dovecot: auth: Error: gssapi(user0(a)domain1.zw.local,172.16.0.44,<Q3GdfL7IvLmsEAAs>): All password databases were skipped Aug 4 13:42:23 postfix10 dovecot: auth: Debug: auth(user0(a)domain1.zw.local,172.16.0.44,<Q3GdfL7IvLmsEAAs>): Auth request finished Aug 4 13:42:25 postfix10 dovecot: auth: Debug: client passdb out: FAIL#0111#011user=user0@domain1.zw.local#011code=temp_fail#011original_user=user0@ZW.LOCAL Aug 4 13:42:25 postfix10 dovecot: pop3-login: Debug: Ignoring unknown passdb extra field: original_user Can someone help on this? -- Lucas Castro

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Pigeonhole v0.5.16 released
by Timo Sirainen 06 Aug '21

06 Aug '21

Hi, Pigeonhole release for Dovecot v2.3.16. https://pigeonhole.dovecot.org/releases/2.3/dovecot-2.3-pigeonhole-0.5.16.t… <https://pigeonhole.dovecot.org/releases/2.3/dovecot-2.3-pigeonhole-0.5.16.t…> https://pigeonhole.dovecot.org/releases/2.3/dovecot-2.3-pigeonhole-0.5.16.t… <https://pigeonhole.dovecot.org/releases/2.3/dovecot-2.3-pigeonhole-0.5.16.t…> Binary packages in https://repo.dovecot.org/ <https://repo.dovecot.org/> Docker images in https://hub.docker.com/r/dovecot/dovecot <https://hub.docker.com/r/dovecot/dovecot> * .dovecot.sieve.log file now includes year in the header. * Change Sieve script result execution to delay definitive action execution to the end of a successful Sieve script execution session. This is part of an effort to solve problems with the Sieve duplicate test. As a side-effect, some rare temporary-error cases yield different results, in which partial failure is more likely.

1 0

Dovecot Debian repo instructions need updating
by Laura Smith 05 Aug '21

05 Aug '21

Re: https://doc.dovecot.org/installation_guide/dovecot_community_repositories/d… The instructions need updating for two reasons: 1) Keep up to date with Debian releases (https://wiki.debian.org/DebianReleases) i.e. remove reference to 8.0 "Jessie" and replace with 10.0 "Buster". 2) The instructions presented for key handling are not inline with Debian best-practices. As per https://wiki.debian.org/DebianRepository/UseThirdParty: "The key MUST be downloaded over a secure mechanism like HTTPS to a location only writable by root, which SHOULD be /usr/share/keyrings. The key MUST NOT be placed in /etc/apt/trusted.gpg.d or loaded by apt-key add. A sources.list entry SHOULD have the signed-by option set. The signed-by entry MUST point to a file, and not a fingerprint."

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quota_grace
by dovecot＠ptld.com 05 Aug '21

05 Aug '21

There isn't much documentation on quota_grace. How would you disable quota grace? quota_grace = 0 quota_grace = 0% quota_grace = 0m quota_grace = -1 Assuming "0" isn't an "unlimited" setting?

2 1

dovecot + Procmail -> junk emails
by Stephane Magnier 03 Aug '21

03 Aug '21

Hi, Having moved from 'mbox' to 'Maildir', I'm trying to use a way to move a spam email to the Junk folder I declared the junk folder as; namespace inbox { type = private disabled = no ignore_on_failure = no list = yes subscriptions = yes #hidden = no #inbox = yes #prefix = INBOX/ mailbox "Drafts" { auto = subscribe special_use = \Drafts } mailbox "Junk" { auto = subscribe autoexpunge = 12 weeks special_use = \Junk } mailbox "Trash" { auto = no autoexpunge = 12 weeks special_use = \Trash } mailbox "Sent" { auto = subscribe special_use = \Sent } and spamassassin, very basic loadplugin Mail::SpamAssassin::Conf required_hits 5 required_score 5 rewrite_header subject [** SPAM ** ] add_header all Status _YESNO_, score=_SCORE_ required=_REQD_ tests=_TESTS_ autolearn=_AUTOLEARN_ version=_VERSION_ spf_timeout 60 rewrite_header to [Email could be SPAM ] fold_headers 0 #defang_mime 0 report_safe 0 and Procmail.. basic and I used what I found on the webpage : https://wiki.dovecot.org/procmail <https://wiki.dovecot.org/procmail> DELIVER="/usr/lib/dovecot/deliver -d $LOGNAME" SHELL="/bin/bash" SENDMAIL="/usr/sbin/sendmail -oi -t" LOGFILE="/var/log/procmail.log" DEFAULT="/var/spool2/mail/%u :0fw | /bin/spamc -s any ####################################### #:0 #* ^X-Spam-Status: Yes #$DEFAULT ####################################### :0 w * ^X-Spam-Status: Yes | $DELIVER -m Junk # ## deliver to INBOX and stop # deliver to INBOX and stop :0 w | $DELIVER But with this config, a spam email, stay into the Inbox :-( /var/log/procmail.log... doesn't exist Thanks for you help

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Multiple Quota Limit Configurations
by Joseph D Wagner 02 Aug '21

02 Aug '21

Is this a valid quota rule? *:storage=0,messages=0 Or do I need to make them two separate rules? Joseph D Wagner

1 0

Timo - is the v2.3.15 GCC limitation really necessarily or it's just a bug?
by Mart Pirita 02 Aug '21

02 Aug '21

Hello. So far I have successfully built Dovecot until v2.3.14 on Centos 4-6 (yes I know, they are old, but as they are remote servers, distros can't upgraded), and sometimes I have also met compilation issues, but after highlighting them, Timo have fixed the code. Found from similar thread (Dovecot 2.3.15 compilation fails https://dovecot.org/list/dovecot/2021-June/122412.html ) that new GCC is needed. However I can't find such requirement in v2.3.15 change log. As seems that I'm not the only one with compilation issues, then @Timo - can You please fix the code so that also v2.3.15 can compiled on older distros? Compilation options: ./configure --prefix=/usr --with-ssl=openssl --with-ssldir=/etc/ssl --sysconfdir=/etc --with-pam --without-bsdauth --without-sql --without-nss --without-ldap --without-pgsql --without-mysql --without-sqlite --with-rundir=/var/run/dovecot --without-cassandra --without-lucene --without-solr --without-textcat --without-libcap --without-stemmer --disable-rpath --disable-dependency-tracking --disable-silent-rules --without-gssapi --without-cdb Compilation error: builtin-strftime -c -o test-smtp-params.o test-smtp-params.c test-smtp-params.c:29: error: unknown field `data' specified in initializer test-smtp-params.c:29: warning: missing braces around initializer test-smtp-params.c:29: warning: (near initialization for `test_params_buffer1.<anonymous>') test-smtp-params.c:30: warning: missing initializer test-smtp-params.c:30: warning: (near initialization for `test_params_buffer1.<anonymous>.<anonymous>.used') test-smtp-params.c:30: error: unknown field `used' specified in initializer test-smtp-params.c:31: warning: excess elements in struct initializer test-smtp-params.c:31: warning: (near initialization for `test_params_buffer1') test-smtp-params.c:33: error: unknown field `data' specified in initializer test-smtp-params.c:33: warning: missing braces around initializer test-smtp-params.c:33: warning: (near initialization for `test_params_buffer2.<anonymous>') test-smtp-params.c:34: warning: missing initializer test-smtp-params.c:34: warning: (near initialization for `test_params_buffer2.<anonymous>.<anonymous>.used') test-smtp-params.c:34: error: unknown field `used' specified in initializer test-smtp-params.c:35: warning: excess elements in struct initializer test-smtp-params.c:35: warning: (near initialization for `test_params_buffer2') make[3]: *** [test-smtp-params.o] Error 1 make[3]: Leaving directory `/usr/src/redhat/BUILD/dovecot-2.3.15/src/lib-smtp' make[2]: *** [all-recursive] Error 1 make[2]: Leaving directory `/usr/src/redhat/BUILD/dovecot-2.3.15/src' make[1]: *** [all-recursive] Error 1 make[1]: Leaving directory `/usr/src/redhat/BUILD/dovecot-2.3.15' make: *** [all] Error 2 error: Bad exit status from /var/tmp/rpm-tmp.7364 (%build) -- Mart

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SQL Backend for IMAP METADATA Dictionary
by Joseph D Wagner 01 Aug '21

01 Aug '21

I've seen documentation on using a SQL backend for quota dictionary and passdb&userdb dictionary. However, I can't find any examples of a SQL backend for IMAP METADATA / mail_attributes_dict. Is this combination possible? If so, is there an example somewhere? I am unsure what data structures it's expected or how to create the map entries for it. Thanks in advance. Joseph D. Wagner

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Disable authentication for submission service
by Dan Conway 01 Aug '21

01 Aug '21

Hello, Is it possible to disable the requirement for authentication on the submission service? I'm trying to require authentication for all, except for a handful of IP addresses. Thank you. ehlo test.com 250-aaa 250-AUTH PLAIN LOGIN 250-BURL imap 250-CHUNKING 250-DSN 250-ENHANCEDSTATUSCODES 250-SIZE 250 PIPELINING MAIL FROM:<test(a)test.com> 530 5.7.0 Authentication required.

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Re: check_policy_service sends size=0
by dovecot＠ptld.com 01 Aug '21

01 Aug '21

> It sounds like a better approach would be to make Dovecot reject any > email no matter what the size is (even size=0) if a user is over > quota. I'll take further discussion to the dovecot mailing list then. If you are not aware, dovecot has by default a 10% over quota grace. So even being a couple of bytes over quota it would still accept a small message.

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Re: Monitoring of director back end nodes
by Tom Sommer 31 Jul '21

31 Jul '21

On 2021-07-31 19:28, darkc0de wrote: > So dovemon for Dovecot pro, but nothing for community? https://github.com/brandond/poolmon --- Tom

1 0

Monitoring of director back end nodes
by Dan Conway 31 Jul '21

31 Jul '21

Hello, When working with director, the state of the backend nodes are not checked by Dovecot. The state always remains as "up". I understand that there are external applications documented that monitor backend nodes, and changes the state of them to "down" if they become unresponsive. The question I have is are there plans to implement something built into Dovecot that would monitor and change states based on backend "health"? Or will it always be dependent on an external service? Thanks.

3 2

quota-status fails when size=0 from Postfix
by Christoph Haas 30 Jul '21

30 Jul '21

Dear list, I've been pulling my hair out today and kindly ask you for help. I'm on Debian Bullseye with Dovecot 2.3.13 and Postfix 3.5.6. Users are stored in SQL and I want to use quotas. Basically I followed https://doc.dovecot.org/configuration_manual/quota_plugin/#quota-service With mail_debug enabled I see that the information from SQL is fetched correctly: dovecot: quota-status(test(a)bullseye.example.org)<45148><>: Debug: auth-master: userdb lookup(test(a)bullseye.example.org): auth USER input: test(a)bullseye.example.org quota_rule=*:bytes=1000 home=/var/vmail/bullseye.example.org/test uid=5000 gid=5000 So the quota rule "*:bytes=1000" is loaded as intended for testing. Before handing the email over to Dovecot through LMTP Postfix should call the quota-service (policy daemon) to determine if the user is over quota: smtpd_recipient_restrictions = \ reject_unauth_destination \ check_policy_service inet:localhost:12340 This is still by the book. What I found: - sending a test mail with Thunderbird properly returns a 5xx status (over quota) - sending a test mail with SWAKS returns DUNNO (swaks is an SMTP test tool) I have used tcpdump to look into the communication on port 12340 and the difference appears to be the "size=0" line that Postfix sends if I use SWAKS. Output from SWAKS: -> RCPT TO:<test(a)bullseye.example.org> <- 250 2.1.5 Ok However if Thunderbird sends an email it uses something like -> RCPT TO:<test(a)bullseye.example.org> SIZE=12345 If I understand the situation correctly then Postfix extracts the SIZE=… value and uses that to send it to the quota-status policy daemon. The user however is definitely over quota: $> doveadm quota get -u test(a)bullseye.example.org Quota name Type Value Limit % User quota STORAGE 1 1 100 User quota MESSAGE 1 - 0 So whatever the size of the incoming email is, it should be rejected. As quota-status returns DUNNO, Postfix will send the email to Dovecot through LMTP. And LMTP in turn does another quota check and correctly rejects the email: postfix/lmtp[45153]: 573419D6A3: to=<test(a)bullseye.example.org>, relay=iredmail-test[private/dovecot-lmtp], delay=0.08, delays=0.05/0.01/0.01/0.01, dsn=5.2.2, status=bounced (host iredmail-test[private/dovecot-lmtp] said: 552 5.2.2 <test(a)bullseye.example.org> Quota exceeded (mailbox for user is full) (in reply to end of DATA command)) Problem here is that a bounce is created and Postfix is sending backscatter. Had "quota-service" indicated that the mailbox is over quota then Postfix had instantly rejected the email without any bounce. I can also reproduce this effect by talking to the quota-status daemon: printf "recipient=test(a)bullseye.example.org\nsize=0\n\n" | nc localhost 12340 action=DUNNO printf "recipient=test(a)bullseye.example.org\nsize=10000\n\n" | nc localhost 12340 action=554 5.2.2 Quota exceeded (mailbox for user is full) Is this a feature? A bug? An evil coincidence? Thanks for reading this far. I know that this matter seems a bit complicated. But it feels like Dovecot's behavior leads to backscatter and of course I'd like to avoid that. Kindly… Christoph

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[bug 2.3.15] seeing user-shared mailboxes across different storage types requires manual change to subscriptions
by Michal Soltys 29 Jul '21

29 Jul '21

Hi, While I was checking old bug I once reported (that one seems to be fixed, https://www.dovecot.org/list/dovecot/2017-January/106593.html) I discovered another issue happening under current version when user sharing his mailbox (with Maildir storage) is not visible under user using mdbox (or sdbox, also tested) - unless subscriptions file is manually adjusted (after subscribing). Consider following config: # 2.3.15 (0503334ab1): /etc/dovecot/dovecot.conf # OS: Linux 5.12.14-arch1-1 x86_64 Arch Linux btrfs # Hostname: hakai auth_debug = yes auth_mechanisms = plain login disable_plaintext_auth = no first_valid_uid = 1 listen = * mail_debug = yes mail_gid = dovecot mail_location = maildir:/var/mail1/%n/Maildir mail_plugins = acl mail_uid = dovecot namespace { inbox = yes location = prefix = separator = / type = private } namespace shared1 { inbox = no list = yes location = maildir:%%h/Maildir/ prefix = shared1/%%n/ separator = / subscriptions = no type = shared } namespace shared2 { inbox = no list = yes location = mdbox:%%h/mdbox/ prefix = shared2/%%n/ separator = / subscriptions = no type = shared } passdb { args = /etc/dovecot/local-maildir driver = passwd-file } passdb { args = /etc/dovecot/local-mdbox driver = passwd-file } plugin { acl = vfile acl_shared_dict = file:/var/mail-data/shared-database/shared-mailboxes.db } protocols = imap service auth { unix_listener auth-userdb { group = mail mode = 0660 user = dovecot } user = dovecot } service imap-login { inet_listener imap { address = * port = 143 } inet_listener imaps { address = * port = 993 } user = dovecot } service imap { executable = /usr/lib/dovecot/imap } userdb { driver = prefetch } userdb { args = /etc/dovecot/local-maildir driver = passwd-file } userdb { args = /etc/dovecot/local-mdbox driver = passwd-file } protocol imap { mail_max_userip_connections = 100 mail_plugins = acl imap_acl } /etc/dovecot/local-maildir: user1:{PLAIN}test:::user1:/var/mail1/user1::userdb_mail=maildir:/var/mail1/user1/Maildir userdb_home=/var/mail1/user1 user2:{PLAIN}test:::user2:/var/mail1/user2::userdb_mail=maildir:/var/mail1/user2/Maildir userdb_home=/var/mail1/user2 /etc/dovecot/local-mdbox: user3:{PLAIN}test:::user3:/var/mail2/user3::userdb_mail=mdbox:/var/mail2/user3/mdbox userdb_home=/var/mail2/user3 There are two shared namespaces - shared1 for Maildir mailboxes and shared2 for mdbox ones. 'user1' is sharing his 'qwer' folder to user3. doveadm mailbox create -u user1 -s qwer doveadm acl add -u user1 qwer user=user3 read lookup doveadm mailbox subscribe -u user3 shared1/user1/qwer This produces subscriptions file such as: 14:44 # cat /var/mail2/user3/mdbox/subscriptions V 2 Trash shared1 user1 qwer With all that in place, 'qwer' won't be visible to user3. But if we change the 'shared1 user1 qwer' to shared1/user1/qwer - then everything will be working fine. Sharing mdbox folder to maildir user (user3 -> user1) as well as maildir to maildir (user1 -> user2) works without issues.

1 1

Shared mailbox strange behaviors
by Ervin Hegedüs 27 Jul '21

27 Jul '21

Hi there, I've set up my Dovecot instance for shared mail accounts. I'm using Debian 10, Dovecot 2.3.4. This is what I did: #namespace { # type = private # separator = / # prefix = # location = # inbox = yes #} namespace { type = shared separator = / prefix = Osztott/%%u/ location = maildir:%%h:INDEX=~/shared/%%u subscriptions = no list = yes } Note, the word "Osztott" means "Shared" in my language. The strange behaviors: 1: as you can see, the first empty namespace is commented. This is because when I restarted the Dovecot instance, it sent this message to the log: Error: namespace configuration error: Duplicate namespace prefix: "" When I commented out these lines, the error message left. Why did that happen? What's the real solution? 2: with this config, I see the shared accounts under my account, with prefix "Osztott" - but the shared account is duplicated. There are two instances with similar names. In first mailbox I see the e-mails, this is fine. But under the "regular" name of the shared mailbox, there is the other mailbox with the same name + a suffix "-1", which is empty. Why is that second maildir there? Thank you for your help, a.

1 0

Submission server and Outlook delivery notification
by Tobia Grosselle [ Terralink ] 26 Jul '21

26 Jul '21

Version: 2.3.15 (0503334ab1) Hello everyone, it seems that the delivery notification function on Outlook doesn't work with Dovecot Submission service, is expected? Will it be implemented? Thanks in advance

1 0

Dovecot and Android's Gmail app
by Jakub Filo 26 Jul '21

26 Jul '21

Hello, does anyone else have this problem with connecting to dovecot (imap) via gmail app on Android, where after removing messages, they reappear shortly after? It happens seemingly randomly, not always. -- Jakub Filo jakub(a)plantroon.com

2 1

Set vhost count in config
by William Edwards 23 Jul '21

23 Jul '21

Hi, Can we do `doveadm director update ... 100` in the on-disk config, so the vhost count is retained after the ring goes down? I could not find such an option in doveconf. -- With kind regards, William Edwards

1 0

Quick Question
by Stephane Magnier 23 Jul '21

23 Jul '21

Hi, Is there a way to transform a "*mbox*" structure ( in the folder : like /var/spool/mail/........ ) into a *maildir* structure ? I would dream to see a doveadm instruction doing something like : */doveadm /var/spool/mail/%u /var/spool2/./*...... something like this.. That would be great !! :-) Thanks and regards

2 2

dovecot and auth cache
by Maciej Milaszewski 23 Jul '21

23 Jul '21

Hi In my lab I have tested auth cache in dovecot like: 1) test auth doveadm auth login ala(a)domain.ltd pass passdb: ala(a)domain.ltd auth succeeded - user ala(a)domain.ltd is in mysql (klater galera) 2)I stop the galley cluster 3)test auth - via cache doveadm auth login ala(a)domain.ltd pass passdb: ala(a)domain.ltd auth succeeded 4)flush cache root@msmtp3:~# doveadm auth cache flush 2 cache entries flushed root@msmtp3:~# doveadm auth cache flush 0 cache entries flushed - cache is emty 5)test auth doveadm auth login ala(a)domain.ltd pass passdb: ala(a)domain.ltd auth succeeded Why 5 step give - successed ? doveconf -n # 2.3.4.1 (f79e8e7e4): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.4 () # OS: Linux 4.19.0-12-amd64 x86_64 Debian 10.9 ... auth_cache_negative_ttl = 5 mins auth_cache_ttl = 5 mins ... If I restart dovecot works correctly - I mean: doveadm auth login ala(a)domain.ltd pass not auth I dont have any idea

1 1

BDAT to DATA translation on submission service when checkpassword is involved
by Dan Conway 23 Jul '21

23 Jul '21

Hello, I'm having issues with Dovecot translating "BDAT" commands (CHUNKING) into "DATA" commands when the backend does not support it in the submission service. I use "checkpassword" to authenticate users and judging by older mailing list entries the presence of "submission_*" directives must be in place for Dovecot to translate. Even with these directives set, the translation doesn't seem to occur. checkpassword returns "director_tag=remote_smtp" (along with other fields such as nopassword=y proxy=y) which in turn sets the backend host to relay the connection to. I have a feeling the use of checkpassword has something to do with this lack of translation. If the "submission_*" directives must be in place for this translation to occur, which ones are they? Can I return these fields from checkpassword? Output of doveconf -n: # 2.3.15 (0503334ab1): /etc/dovecot/dovecot.conf # OS: Linux 4.15.0-147-generic x86_64 Ubuntu 18.04.5 LTS # Hostname: xyz auth_debug = yes auth_debug_passwords = yes auth_mechanisms = plain login auth_verbose = yes director_mail_servers = x.x.x.x@remote_smtp director_servers = x.x.x.x disable_plaintext_auth = no mail_log_prefix = "%Us(%u) [%r]: " passdb { args = /usr/local/bin/checkpassword driver = checkpassword } protocols = " imap pop3 submission" service anvil { client_limit = 3553 } service auth { client_limit = 3550 } service director { fifo_listener login/proxy-notify { mode = 0600 user = $default_login_user } inet_listener { address = x.x.x.x port = 9090 } unix_listener director-admin { mode = 0600 } unix_listener login/director { mode = 0666 } } service imap-login { executable = imap-login director inet_listener imap { address = x.x.x.x port = 143 } inet_listener imaps { address = x.x.x.x port = 993 ssl = yes } process_limit = 1000 process_min_avail = 0 service_count = 1 } service imap { process_limit = 2048 process_min_avail = 0 service_count = 1 vsz_limit = 384 M } service pop3-login { executable = pop3-login director inet_listener pop3 { address = x.x.x.x port = 110 } inet_listener pop3s { address = x.x.x.x port = 995 ssl = yes } process_limit = 450 } service pop3 { process_limit = 190 process_min_avail = 0 service_count = 1 } service submission-login { executable = submission-login director inet_listener smtp { address = x.x.x.x port = 25 } inet_listener smtps { address = x.x.x.x port = 465 ssl = yes } inet_listener submission { address = x.x.x.x port = 587 } process_limit = 2000 } ssl_cert = </etc/... ssl_dh = # hidden, use -P to show it ssl_key = # hidden, use -P to show it ssl_min_protocol = TLSv1.1 submission_backend_capabilities = submission_host = x.x.x.x submission_relay_host = x.x.x.x submission_relay_port = 465 submission_relay_ssl = smtps submission_relay_trusted = yes userdb { args = /etc/dovecot/userdb.conf driver = ldap } protocol imap { imap_logout_format = bytes=%i/%o, del=%e mail_max_userip_connections = 20 } protocol pop3 { mail_max_userip_connections = 20 pop3_logout_format = top=%t/%p, retr=%r/%b, del=%d/%m, size=%s } protocol submission { mail_max_userip_connections = 10 } local_name *.domain.com { ssl_cert = </etc/... ssl_key = # hidden, use -P to show it }

2 1

folders and subfolders
by Stephane Magnier 22 Jul '21

22 Jul '21

Hi, Still looking for the way to create folders and sub folders.. Today, I am using "mbox", which apparently doesn't work for this ? correct ? So, I would probably need to use maildir.. ( https://doc.dovecot.org/configuration_manual/mail_location/Maildir/ ] Today, what I am using is :*mbox, *which is gather all the mailboxes of user 1, user 2 in one folder... like : mbox:/var/spool2/mail/%u 1) I suppose, that If I am using "mbox" with .. : LAYOUT=fs, I won't get these folders and subfolders ? - Correct ? 2) Instead of having : "maildir:~/Maildir " which, I suppose got each_user folder into their own home directory_ .. correct ? Can I have : *maildir:/var/spool2/mail/%u *? ( I would prefer to gather all users' mailbox into one folder like /var/spool2/mail/ ) 3) if so, *mbox:/var/spool2/mail/%u:INBOX=/var/spool/mail/%u* => can become : *maildir:/var/spool2/mail/%u:LAYOUT=fs:INBOX=/var/spool/mail/%u* What do you think ?... before trying and breaking everything :-)... if so, I will be killed Thanks and regards

5 20

Doveadm encrypt/decrypt files manually with per-user folder keys
by Ben Burk 21 Jul '21

21 Jul '21

There is an example of manually encrypting/decrypting mail processed by the mail_crypt plugin here: https://doc.dovecot.org/configuration_manual/mail_crypt_plugin/ It outlines how one would manually encrypt/decrypt messages using global keys: doveadm fs get/put crypt private_key_path=foo:public_key_path=foo2:posix:prefix=/path/to/files/root path/to/file Is there a way to accomplish this using per-user folder keys? Is there some way of making sense of the information in the dovecot-attributes file to accomplish this? -- Ben Burk BURK.TECH System Administrator

2 6

Traffic accounting
by Jesús Ángel del Pozo Domínguez 20 Jul '21

20 Jul '21

Hello, Could you please tell me whether is it possible to do traffic accounting using Dovecot 2.3.4? What I'd like to do is to collect network traffic (both in & out) for each user (both POP and IMAP traffic). Regards,

4 4

dovecot-lmtp crashing when setting lmtp_proxy=yes
by Camilo Sperberg 19 Jul '21

19 Jul '21

Hi all: We are currently in the process of setting up dovecot proxy so that we can deploy multiple machines in order to keep growing. We are trying now to create an entry point, and from there send the traffic to either the same machine or another node. For this, we are using a MySQL database with information about which server hosts which mailboxes, which turns out to be working great for sending out mail and general authentification. This was really simple to set up, kudos for that! However, whenever I want to *receive* email, I just have to enable the lmtp_proxy setting which makes the lmtp process segfault. This happens everytime as I can reliable reproduce it + get a stack trace of it. The process will crash on every incoming email. I have attached: - Complete output of dovecot-sysreport - A core dump of the crashed process Main information: Using dovecot v2.3.14 (cee3cbc0d) on Ubuntu 18.04 LTS: Linux 5.4.0-1046-gcp x86_64 Ubuntu 18.04.5 LTS. Our MTA is postfix. Logs around the crashed process: Jul 15 14:53:21 server postfix/postscreen[19402]: CONNECT from [XX.XX.XX.XX]:36411 to [10.164.0.18]:25 Jul 15 14:53:22 server postfix/dnsblog[19406]: addr XX.XX.XX.XX listed by domain dnsbl.sorbs.net as 127.0.0.6 Jul 15 14:53:27 server postfix/postscreen[19402]: PASS NEW [XX.XX.XX.XX]:36411 Jul 15 14:53:27 server postfix/smtpd[19408]: connect from mail-XX.google.com [XX.XX.XX.XX] Jul 15 14:53:28 server postfix/smtpd[19408]: B765F401DB: client= mail-XX.google.com[XX.XX.XX.XX] Jul 15 14:53:28 server postfix/cleanup[19411]: B765F401DB: message-id=< XX+5j3RpXXXXXOK7GHdiDSGSPXXXX(a)mail.gmail.com> Jul 15 14:53:29 server postfix/qmgr[1414]: B765F401DB: from=< unreal4u(a)gmail.com>, size=2815, nrcpt=1 (queue active) Jul 15 14:53:29 server dovecot: lmtp(19413): Connect from local Jul 15 14:53:29 server kernel: [1738624.857507] lmtp[19413]: segfault at 0 ip 00007fd486cd0a37 sp 00007ffc12a6c118 error 4 in libdovecot.so.0.0.0[7fd486ba1000+1aa000] Jul 15 14:53:29 server kernel: [1738624.857514] Code: eb de 90 48 85 d2 75 1e eb 33 66 0f 1f 84 00 00 00 00 00 84 c0 74 18 48 83 c7 01 48 83 c6 01 88 47 ff 48 83 ea 01 48 83 fa 01 <0f> b6 06 77 e4 c6 07 00 31 c0 80 3e 00 0f 95 c0 f7 d8 c3 b8 ff ff Jul 15 14:53:29 server dovecot: lmtp(19413): Fatal: master: service(lmtp): child 19413 killed with signal 11 (core dumped) Jul 15 14:53:29 server postfix/lmtp[19412]: B765F401DB: to=<YYY(a)YYYY.YY>, relay=ZZZ.ZZZ.ZZ[private/dovecot-lmtp], delay=0.88, delays=0.84/0.01/0.01/0.03, dsn=4.4.2, status=deferred (lost connection with ZZZ.ZZZ.ZZ[private/dovecot-lmtp] while sending RCPT TO) Jul 15 14:53:29 server postfix/smtpd[19408]: disconnect from mail-XX.google.com[XX.XX.XX.XX] ehlo=2 starttls=1 mail=1 rcpt=1 data=1 quit=1 commands=7 Am I missing something in the conf? Did I encounter a bug? If you need more information, please let me know. Greetings, Camilo Sperberg

2 2

Major upgrade of mail server
by Shawn Heisey 18 Jul '21

18 Jul '21

I have a mail server in AWS that is currently running Ubuntu 18. Every time I log in, I am reminded that I can upgrade to Ubuntu 20. On Ubuntu 18, the dovecot version is 3.3.0-1ubuntu0.3. On Ubuntu 20, it is 2.3.7.2-1ubuntu3. Many other packages, probably including the mysql server, would also be upgraded. Dovecot and Postfix use a postfixadmin database in mysql for users, and postfix is using dovecot-lda to deliver mail. I am using managesieve from dovecot on roundcube webmail. As far as I know, my own user is the only one with sieve scripts actually in use ... and I have a LOT of filters/folders for various mailing lists. I've been a little bit terrified of doing an upgrade, because I do have a couple of people using my mail server for real work email and I don't want to disrupt them. I'm writing today to find out what are the likely pain points I might encounter when doing this kind of major upgrade, and if there is any helpful information that can help me get through those problems. I'm hoping that it will go smoothly and everything just works. Here's the doveconf -n output: https://apaste.info/FUgF If I have been silly enough to include sensitive data from the config, I would appreciate a heads up so I know what passwords to change. I did a quick glance and didn't see anything. Thanks, Shawn

5 5

Dovecot book for a newbie
by techlists＠phpcoderusa.com 16 Jul '21

16 Jul '21

Hi, Please recommend a Dovecot book for a newbie... I have a fair amount of Linux PHP hosting experience - LAMP virtual host configurations. I'm new to BIND, Postfix, and Dovecot. I'm running Ubuntu 20.04lts. I have a test server almost working. Can send but not receive. Would like to understand more. I'm guessing it is a Zone (MX) / SSL / Client configuration issue. Thanks in advance!!

5 8

OT somewhat, how to unsubscribe?
by Christy S 16 Jul '21

16 Jul '21

Hi folks, It's been a while since I've subscribed and I don't remember how to get off the mailing list. We've changed how we're handling mail now, so dovecot is no longer being used. Can anyone help? MOst mailing lists have a blurb at the bottom with instructions but this one doesn't seem to. Thanks Christy

3 2

Dovecot geographically distributed
by Claudio Corvino 16 Jul '21

16 Jul '21

Hi, I have a single Dovecot (2.3.4.1) IMAP/LMTP server on HQ "A" and I would like to create a backup server distributed to HQ "B", two HQ are connected through an IPsec tunnel. User mailboxes (type mbox) are on NFS storage. I don't need HA, it could even be an active / passive configuration with a floating IP, but I don't know how to keep in sync the two remote NFS filesystems. I don't know if Dovecot replication is suitable for me. Thanks -- *Claudio Corvino IT Systems Administrator*

1 0

2FA/MFA with IMAP & postfix/submission
by Alex 16 Jul '21

16 Jul '21

Hi, I have a dovecot-2.3.13 system on fedora34 with a few hundred IMAP4 accounts, as well as postfix users using submission. Clients are using primarily Outlook on Windows and old squirrelmail. Are there multi-factor options available? If it is not available, do you have any recommendations on where I should look to do this? All of the links related to this topic appear to be very old, or limited to Linux PAM users.

12 19

function for whitelisting IPs
by White, Daniel E. (GSFC-770.0)[NICS] 16 Jul '21

16 Jul '21

Sebastian, Do you have any examples of such a function and how/where it is used ? -----Original Message----- From: dovecot <dovecot-bounces(a)dovecot.org> on behalf of Sebastian <sebastian(a)sebbe.eu> Reply-To: Dovecot Mailing List <dovecot(a)dovecot.org> Date: Thursday, July 15, 2021 at 01:19 To: 'Mailing List' <dovecot(a)dovecot.org> Subject: [EXTERNAL] Sv: 2FA/MFA with IMAP & postfix/submission Main problem is that not many clients do natively support multifactor. Some clients, do popup a login dialog if the server rejects the password as invalid, which can be used to create a "cheaty variant" of multifactor, but some clients just popup an error dialog and tell the user to just correct password in settings. Some clients even go as long as requiring the user to delete the account with wrong password and set up a new connection. So no, it cannot be relied upon. I have a better idea: Have a function for whitelisting IPs, possible /24's or similiar, where a login to roundcube or other webmail client (with 2FA) will add the IP onto a whitelist for that account. Or perhaps, just "set" the country of the account based on GeoIP. When an account tries to login via IMAP or SMTP, you just check if IP and/or GeoIP country is right, and reject the login as invalid if so not. The only thing a client needs to do to get his IMAP or SMTP client to work again if it stops working, is to login once via the web client. -----Ursprungligt meddelande----- Från: dovecot-bounces(a)dovecot.org <dovecot-bounces(a)dovecot.org> För Alex Skickat: den 15 juli 2021 02:10 Till: dovecot(a)dovecot.org Ämne: 2FA/MFA with IMAP & postfix/submission Hi, I have a dovecot-2.3.13 system on fedora34 with a few hundred IMAP4 accounts, as well as postfix users using submission. Clients are using primarily Outlook on Windows and old squirrelmail. Are there multi-factor options available? If it is not available, do you have any recommendations on where I should look to do this? All of the links related to this topic appear to be very old, or limited to Linux PAM users.

7 10

TLS Security
by Stefan Schumacher 15 Jul '21

15 Jul '21

Hi, I wish to build a new secure email server. It seems I am on the right way – at least I get no more error messages for Postfix – but Dovecot is still making trouble. I am using Dovecot 1:2.3.4.1-5+deb10u6 and I am using ISPconfig 3.25 to do the rough configuring and nano and whats left of my brain to do the finer details. Lets start with what I added to conf.d/10-ssl.conf ssl_cert = </etc/letsencrypt/live/servername/fullchain.pem ssl_key = </etc/letsencrypt/live/servername/privkey.pem ssl_cipher_list = EECDH+ECDSA+AESGCM:EECDH+aRSA+AESGCM:EECDH+ECDSA+SHA384:EECDH+ECDSA+SHA256:EECDH+aRSA+SHA384:EECDH+aR$ ssl_protocols = !SSLv2 !SSLv3 !TLSv1 !TLSv1.1 ssl_min_protocol = TLSv1.2 As you can see, I clearly do not want to use TLS before v1.2. I think this is not unreasonable in the year 2021. Now, after the changes I ran Kali (I use it to verify the results of my experiments) and - this is a mailing list, so no screenshots: It says: SSL/TLS Deprecated TLS v1.0 and TLS v1.1 Detection. I get this for the ports 143, 110, 993 and 995. I thought I had done everything one could to disable old TLS-Versions. What am I doing wrong? Yours sincerely Stefan Schumacher

4 6

AW: TLS Security
by Stefan Schumacher 15 Jul '21

15 Jul '21

Hi Justina, Kali tools is of course extremly unprecise. Excuse me, I had a long stressful day and wanted to get this out before the end of the Day. Kali is a rolling release and I keep it up to date by upgrading every few days. I also update the feeds. What I actually use for security scans is the former OpenVAS, which now has been relegated to being a part of the Community Edition of the Greenbone suite. You have seen the values I have in Dovecot. What follows now are my settings in the postfix main.cf. As you can clearly see it, it should prevent connections from TLS below 1.2. Dovecot is of course not very fresh because it's Debian 10 and Debian 11 is just around the corner (a few days). These are the settings of my postfix main.cf. I am very tempted to grab an Image of Debian 11 and install ISPConfig and my Dovecot and Postfix settings there. I am of course open to any other suggestions. A the moment I consider to install a new Bullseye RC2 and then put my configuration on it. I am of course open for any other suggestions. Yours sincerely Stefan smtpd_use_tls = yes smtpd_tls_cert_file = /etc/postfix/smtpd.cert smtpd_tls_key_file = /etc/postfix/smtpd.key smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache smtpd_tls_eecdh_grade = strong smtpd_tls_protocols= !SSLv2, !SSLv3, !TLSv1, !TLSv1.1 smtpd_tls_mandatory_protocols= !SSLv2, !SSLv3, !TLSv1, !TLSv1.1 smtpd_tls_mandatory_ciphers = high smtpd_tls_security_level=may smtpd_tls_ciphers = high tls_preempt_cipherlist = yes smtpd_tls_mandatory_exclude_ciphers = aNULL, MD5 , DES, ADH, RC4, PSD, SRP, 3DES, eNULL smtpd_tls_exclude_ciphers = aNULL, MD5 , DES, ADH, RC4, PSD, SRP, 3DES, eNULL smtp_tls_mandatory_protocols = !SSLv2, !SSLv3, !TLSv1, !TLSv1.1 smtp_tls_protocols = !SSLv2, !SSLv3, !TLSv1, !TLSv1.1 ________________________________ Von: justina colmena ~biz <justina(a)colmena.biz> Gesendet: Mittwoch, 14. Juli 2021 18:50 An: dovecot(a)dovecot.org <dovecot(a)dovecot.org>; Stefan Schumacher <s.schumacher(a)consulting1x1.com> Betreff: Re: TLS Security Interesting. Assuming your "Kali" tools are in fact up to date to test with newer protocols TLS1.2+, is Dovecot compiled against a recent version of the OpenSSL or GnuTLS library or whatever it uses to support the newer TLS protocols? Definitely an outdated cipher issue, on Postfix as well as Dovecot.... On July 14, 2021 6:55:19 AM AKDT, Stefan Schumacher <s.schumacher(a)consulting1x1.com> wrote: Hi, I wish to build a new secure email server. It seems I am on the right way – at least I get no more error messages for Postfix – but Dovecot is still making trouble. I am using Dovecot 1:2.3.4.1-5+deb10u6 and I am using ISPconfig 3.25 to do the rough configuring and nano and whats left of my brain to do the finer details. Lets start with what I added to conf.d/10-ssl.conf ssl_cert = </etc/letsencrypt/live/servername/fullchain.pem ssl_key = </etc/letsencrypt/live/servername/privkey.pem ssl_cipher_list = EECDH+ECDSA+AESGCM:EECDH+aRSA+AESGCM:EECDH+ECDSA+SHA384:EECDH+ECDSA+SHA256:EECDH+aRSA+SHA384:EECDH+aR$ ssl_protocols = !SSLv2 !SSLv3 !TLSv1 !TLSv1.1 ssl_min_protocol = TLSv1.2 As you can see, I clearly do not want to use TLS before v1.2. I think this is not unreasonable in the year 2021. Now, after the changes I ran Kali (I use it to verify the results of my experiments) and - this is a mailing list, so no screenshots: It says: SSL/TLS Deprecated TLS v1.0 and TLS v1.1 Detection. I get this for the ports 143, 110, 993 and 995. I thought I had done everything one could to disable old TLS-Versions. What am I doing wrong? Yours sincerely Stefan Schumacher -- Sent from my Android device with K-9 Mail. Please excuse my brevity.

1 0

Verifying replication
by Arnold Hendriks 15 Jul '21

15 Jul '21

Dear Dovecot people, I've set up Dovecot replication a couple of years ago. I'm watching the general server health and having Nagios check doveadm replicator status regularly. I'm seeing accounts replicating, disk space usage obviously shows that things work in principle, however, I still wonder whether the replication actually works properly. Accounts I check work, but 1-5% of the messages could easily be missing without me noticing it. These servers have I think about 50K accounts (a lot of them dormant) and between 1 to 2TB of mail. I'm trying to get some more confidence as to whether replication is actually working properly and whether I'm not missing anything that will burn me if I ever have to 'fallback'. Has anyone ever done some verification outside of simply watching doveadm replication stats, to see if they are missing anything ? Eg, I could imagine a process that generates a list of accounts, and then generates hashes on both sides of the replication for each mailbox folder. If the hashes match, the folder gets removed from the list, and once all folders are removed, the account gets removed. Iterating the account list should finally reduce it to 0, or a few extremely high traffic accounts which can be checked manually or be ignored. But I'm trying to avoid reinventing the wheel. Has anyone done anything like this, or can suggest a different approach? With regards, Arnold Hendriks

1 1

Forcing replication - difference is a 0x0D 0x0D 0xA sequence?
by Arnold Hendriks 15 Jul '21

15 Jul '21

I've found a few mailboxes on my system that were being replicated where the mailboxes are not in sync. On server 1 I see: dovecot1:/# doveadm fetch -u s0000000 "size.physical size.virtual" mailbox-guid c92f64f79f0d1ed01e6d5b314f04886c uid 115 size.physical: 1815 size.virtual: 1843 On server 2 I see: dovecot2:/# doveadm fetch -u s0000000 "size.physical size.virtual" mailbox-guid c92f64f79f0d1ed01e6d5b314f04886c uid 115 size.physical: 1805 size.virtual: 1833 Running ' doveadm replicator replicate -f s0000000 "*" ' does not fix the issue. I've compared the mails and the difference appears to be that the primary server (where the mail comes in) has a few occurences of "0D 0D 0A" (hex) which on the replicated server looks like "0D 0A". (ie, \r\r\n was replicated as \r\n ?) Is there a way to force these two messages to be in sync again ? Is the \r\r\n being replicated as \r\n a known issue ? (I'm not sure if I could replicate this, this message dates back to 2007 so probably wasn't even received originally on this server. Replication was configured much later than 2007)

1 0

folders management
by Stephane Magnier 15 Jul '21

15 Jul '21

Hi, Sorry to ask you , maybe a silly question :-) On my folders' architecture, I can see all the folders underneeth each other fodler1 folder2 etc.... I would like to have the possibility to have _folders INTO folders_, like Folder1 Folder2 .......folder 21 ......folder 22 Folders 3 Apparently, this is link to this déclaration :__*_mbox_:/var/spool2/mail/%u. *Is that correct ? is that the "mbox" declaration? or Am I complety wrong ? If I have need to change...I have to change it for what ? * Can I use this new structure with NFS shares ? * What is the backside of it ? Now, if I make this modification.. on an existing dovecot system... , Will it make a true disaster ? or I can change the declaration easily? Thanks and regards,

2 1

Restrict number of mail moved/copied
by Amol Kulkarni 14 Jul '21

14 Jul '21

Hello, I need to restrict number of mail moved/copied by end user using imap in operation. Is there any configuration for that ? Thanks and regards, Amol

1 0

dsync I/O Stalled
by Paolo Daniele 14 Jul '21

14 Jul '21

Hi guys, i've a strange problem between 2 servers. It happened after a changing on our network core routing infrastructure. We've moved to Juniper network and eBGP and iBGP of our server. One of this server is behind a firewall and communicate with another server in another country to sync our emails. Doveadmin replica seems to be fine, but sometimes i get this error message: dsync-server(aaaaa(a)bbb.bb): Error: Timeout during state=sync_mails (send=done recv=mails) It seems like the remote server has troubles to reach our local server but if i do a stupid ping i'm not losing anything. Maybe is there something am i missing? I thought that it could be related to a MTU problem but i'm not so sure and i've increased MTU on the routers involved in routing process without success. I wa missing that both servers are behind a load balancer wich is in our local DC. Can you give me some hints? Regards, Paolo -- Paolo Daniele Intendo s.r.l. E-mail: paolo.daniele(a)intendo.it Business Unit TLCWEB Tel.: +39 0968 430786 Via Coschi, 11 Skype: paolo_daniele1 88046 - Lamezia Terme, Cz Web: http://www.tlcweb.it Italia Web: http://www.intendo.it

2 2

Potential bug: Assumption that POSIX time functions do not clobber errno
by Florian Weimer 13 Jul '21

13 Jul '21

We accidentally ran the dovecot 2.3.14 testsuite on a host where clock_gettime (and probably time and gettimeofday) succeed, but set errno to ENOSYS. This behavior is unusual, but permitted by POSIX: successful function calls can overwrite errno, as long as they don't set it to 0. The relevant log excerpt looks like this: make[3]: Entering directory '/builddir/build/BUILD/dovecot-2.3.14/src/master' for bin in test-auth-client test-auth-master test-master-login-auth; do \ if ! ./$bin; then exit 1; fi; \ done test-common.c:200: Assert failed: suppress == TRUE connection refused: run (ret == -1) .................................. : ok: Connection failed CLIENT: Error: auth-client: conn unix:./auth-client-test: connect(./auth-client-test) failed: Function not implemented connection refused ................................................... : FAILED connection timed out: run (ret == -1) ................................ : ok: Connection failed connection timed out: timeout ........................................ : ok connection timed out ................................................. : ok bad version: run (ret == -1) ......................................... : ok: Connection failed bad version .......................................................... : ok disconnect version: run (ret == -1) .................................. : ok: Internal failure disconnect version ................................................... : ok auth PLAIN disconnect: run (ret < 0) ................................. : ok auth PLAIN disconnect ................................................ : ok auth PLAIN reconnect: run (ret < 0) .................................. : ok auth PLAIN reconnect ................................................. : ok auth PLAIN failure: run (ret < 0) .................................... : ok auth PLAIN failure ................................................... : ok auth PLAIN success: run (ret == 0) ................................... : ok auth PLAIN success ................................................... : ok auth LOGIN failure 1: run (ret < 0) .................................. : ok auth LOGIN failure 1 ................................................. : ok auth LOGIN failure 2: run (ret < 0) .................................. : ok auth LOGIN failure 2 ................................................. : ok auth LOGIN success: run (ret == 0) ................................... : ok auth LOGIN success ................................................... : ok auth PLAIN parallel failure: run (ret < 0) ........................... : ok auth PLAIN parallel failure .......................................... : ok auth PLAIN parallel success: run (ret == 0) .......................... : ok auth PLAIN parallel success .......................................... : ok auth LOGIN parallel failure 1: run (ret < 0) ......................... : ok auth LOGIN parallel failure 1 ........................................ : ok auth LOGIN parallel failure 2: run (ret < 0) ......................... : ok auth LOGIN parallel failure 2 ........................................ : ok auth LOGIN parallel success: run (ret == 0) .......................... : ok auth LOGIN parallel success .......................................... : ok 1 / 49 tests failed make[3]: Leaving directory '/builddir/build/BUILD/dovecot-2.3.14/src/master' “Function not implemented” suggests that dovecot somehow used the clock_gettime (or gettimeofday) ENOSYS error instead of the expected ECONNREFUSED error code. Unfortunately, I have not figured out where this exactly happens. I don't expect that the problematic glibc build escapes to the wild It was a glibc 2.34 development snapshot, and this particular source of ENOSYS errors is gone again. So fixing this is not urgent. Thanks, Florian

1 0

move mails between mailboxes
by Tom Doenen 13 Jul '21

13 Jul '21

Hello, i am using dovecot 2.3.4.1 I am tyring to make a script using the doveadm move command to move old emails into a subfolder of the users INBOX ; say all mails from 2016 into INBOX/2016. Selecting and moving is not the issue; everything works just i am amazed that the (test) mail client Thunderbird downloads all mails in INBOX/2016 after the move. When i make an IMAP move of all 2016-mails in Thunderbird; mails are moved between the mailboxes without any mails being (re-)downloaded. So what am i missing here? Thank for the tip :) Kind regards, Tom the doveadm move debug output is : Debug: Loading modules from directory: /usr/lib/dovecot/modules Debug: Module loaded: /usr/lib/dovecot/modules/lib10_quota_plugin.so Debug: Module loaded: /usr/lib/dovecot/modules/lib20_listescape_plugin.so Debug: Module loaded: /usr/lib/dovecot/modules/lib20_zlib_plugin.so Debug: Loading modules from directory: /usr/lib/dovecot/modules/doveadm Debug: Skipping module doveadm_acl_plugin, because dlopen() failed: /usr/lib/dovecot/modules/doveadm/lib10_doveadm_acl_plugin.so: undefined symbol: acl_user_module (this is usually intentional, so just ignore this message) Debug: Skipping module doveadm_expire_plugin, because dlopen() failed: /usr/lib/dovecot/modules/doveadm/lib10_doveadm_expire_plugin.so: undefined symbol: expire_set_deinit (this is usually intentional, so just ignore this message) Debug: Module loaded: /usr/lib/dovecot/modules/doveadm/lib10_doveadm_quota_plugin.so Debug: Module loaded: /usr/lib/dovecot/modules/doveadm/lib10_doveadm_sieve_plugin.so Debug: Skipping module doveadm_fts_lucene_plugin, because dlopen() failed: /usr/lib/dovecot/modules/doveadm/lib20_doveadm_fts_lucene_plugin.so: undefined symbol: lucene_index_iter_deinit (this is usually intentional, so just ignore this message) Debug: Skipping module doveadm_fts_plugin, because dlopen() failed: /usr/lib/dovecot/modules/doveadm/lib20_doveadm_fts_plugin.so: undefined symbol: fts_user_get_language_list (this is usually intentional, so just ignore this message) Debug: Skipping module doveadm_mail_crypt_plugin, because dlopen() failed: /usr/lib/dovecot/modules/doveadm/libdoveadm_mail_crypt_plugin.so: undefined symbol: mail_crypt_box_get_pvt_digests (this is usually intentional, so just ignore this message) doveadm(tom(a)somedomain.org)<17541><>: Debug: auth USER input: tom(a)somedomain.org uid=5000 gid=5000 home=/mailstore/somedomain.org/to/tom/ doveadm(tom(a)somedomain.org): Debug: Effective uid=5000, gid=5000, home=/mailstore/somedomain.org/to/tom/ doveadm(tom(a)somedomain.org): Debug: Quota root: name=User quota backend=maildir args= doveadm(tom(a)somedomain.org): Debug: Quota rule: root=User quota mailbox=* bytes=8589934592 messages=0 doveadm(tom(a)somedomain.org): Debug: Quota rule: root=User quota mailbox=Trash bytes=+104857600 messages=0 doveadm(tom(a)somedomain.org): Debug: Quota warning: bytes=8589934592 (100%) messages=0 reverse=no command=quota-warning 100 tom(a)somedomain.org doveadm(tom(a)somedomain.org): Debug: Quota warning: bytes=8504035246 (99%) messages=0 reverse=no command=quota-warning 99 tom(a)somedomain.org doveadm(tom(a)somedomain.org): Debug: Quota warning: bytes=8418135900 (98%) messages=0 reverse=no command=quota-warning 98 tom(a)somedomain.org doveadm(tom(a)somedomain.org): Debug: Quota warning: bytes=8246337208 (96%) messages=0 reverse=no command=quota-warning 96 tom(a)somedomain.org doveadm(tom(a)somedomain.org): Debug: Quota warning: bytes=8074538516 (94%) messages=0 reverse=no command=quota-warning 94 tom(a)somedomain.org doveadm(tom(a)somedomain.org): Debug: Quota warning: bytes=7902739824 (92%) messages=0 reverse=no command=quota-warning 92 tom(a)somedomain.org doveadm(tom(a)somedomain.org): Debug: Quota warning: bytes=7730941132 (90%) messages=0 reverse=no command=quota-warning 90 tom(a)somedomain.org doveadm(tom(a)somedomain.org): Debug: Quota warning: bytes=7301444403 (85%) messages=0 reverse=no command=quota-warning 85 tom(a)somedomain.org doveadm(tom(a)somedomain.org): Debug: Quota warning: bytes=6871947673 (80%) messages=0 reverse=no command=quota-warning 80 tom(a)somedomain.org doveadm(tom(a)somedomain.org): Debug: Quota warning: bytes=6012954214 (70%) messages=0 reverse=no command=quota-warning 70 tom(a)somedomain.org doveadm(tom(a)somedomain.org): Debug: Quota warning: bytes=8589934592 (100%) messages=0 reverse=yes command=quota-warning 0 tom(a)somedomain.org doveadm(tom(a)somedomain.org): Debug: Quota grace: root=User quota bytes=47185920 doveadm(tom(a)somedomain.org): Debug: Namespace inbox: type=private, prefix=, sep=/, inbox=yes, hidden=no, list=yes, subscriptions=yes location=maildir:/mailstore/somedomain.org/to/tom:INDEX=/indexes/somedomain… doveadm(tom(a)somedomain.org): Debug: maildir++: root=/mailstore/somedomain.org/to/tom, index=/indexes/somedomain.org/to/tom, indexpvt=, control=, inbox=/mailstore/somedomain.org/to/tom/.INBOX, alt= doveadm(tom(a)somedomain.org): Debug: quota: quota_over_flag check: quota_over_script unset - skipping doveadm(tom(a)somedomain.org): Debug: Mailbox INBOX/2016: Mailbox opened because: move doveadm(tom(a)somedomain.org): Debug: Mailbox INBOX: Mailbox opened because: move doveadm(tom(a)somedomain.org): Debug: Mailbox INBOX/2016: saving UID 0: Opened mail because: mail stream doveadm(tom(a)somedomain.org): Debug: Mailbox INBOX: UID 52642: Opened mail because: mail stream doveadm(tom(a)somedomain.org): Debug: Mailbox INBOX/2016: saving UID 0: Opened mail because: mail stream doveadm(tom(a)somedomain.org): Debug: Mailbox INBOX: UID 52643: Opened mail because: mail stream doveadm(tom(a)somedomain.org): Debug: Mailbox INBOX/2016: saving UID 0: Opened mail because: mail stream doveadm(tom(a)somedomain.org): Debug: Mailbox INBOX: UID 52644: Opened mail because: mail stream doveadm(tom(a)somedomain.org): Debug: Mailbox INBOX/2016: saving UID 0: Opened mail because: mail stream doveadm(tom(a)somedomain.org): Debug: Mailbox INBOX: UID 52645: Opened mail because: mail stream doveadm(tom(a)somedomain.org): Debug: Mailbox INBOX/2016: saving UID 0: Opened mail because: mail stream doveadm(tom(a)somedomain.org): Debug: Mailbox INBOX: UID 52646: Opened mail because: mail stream doveadm(tom(a)somedomain.org): Debug: Mailbox INBOX/2016: saving UID 0: Opened mail because: mail stream doveadm(tom(a)somedomain.org): Debug: Mailbox INBOX: UID 52963: Opened mail because: mail stream doveadm(tom(a)somedomain.org): Debug: Mailbox INBOX/2016: saving UID 0: Opened mail because: mail stream doveadm(tom(a)somedomain.org): Debug: Mailbox INBOX: UID 52964: Opened mail because: mail stream doveadm(tom(a)somedomain.org): Debug: Mailbox INBOX/2016: saving UID 0: Opened mail because: mail stream doveadm(tom(a)somedomain.org): Debug: Mailbox INBOX: UID 52965: Opened mail because: mail stream doveadm(tom(a)somedomain.org): Debug: Mailbox INBOX/2016: saving UID 0: Opened mail because: mail stream doveadm(tom(a)somedomain.org): Debug: Mailbox INBOX: UID 52967: Opened mail because: mail stream doveadm(tom(a)somedomain.org): Debug: Mailbox INBOX/2016: saving UID 0: Opened mail because: mail stream doveadm(tom(a)somedomain.org): Debug: Mailbox INBOX: UID 52968: Opened mail because: mail stream doveadm(tom(a)somedomain.org): Debug: Mailbox INBOX/2016: saving UID 0: Opened mail because: mail stream doveadm(tom(a)somedomain.org): Debug: Mailbox INBOX: UID 52969: Opened mail because: mail stream doveadm(tom(a)somedomain.org): Debug: Mailbox INBOX/2016: saving UID 0: Opened mail because: mail stream doveadm(tom(a)somedomain.org): Debug: Mailbox INBOX: UID 52970: Opened mail because: mail stream doveadm(tom(a)somedomain.org): Debug: Mailbox INBOX/2016: saving UID 0: Opened mail because: mail stream doveadm(tom(a)somedomain.org): Debug: Mailbox INBOX: UID 52972: Opened mail because: mail stream etc etc... obscured config : # 2.3.4.1 (f79e8e7e4): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.4 () # OS: Linux 4.19.194-rt81 x86_64 Debian 10.0 ext4 # Hostname: hardy.somedomain.org auth_cache_negative_ttl = 7 mins auth_cache_size = 20 M auth_cache_ttl = 12 mins auth_cache_verify_password_with_worker = yes auth_failure_delay = 9 secs auth_mechanisms = plain login auth_username_chars = auth_worker_max_count = 90 default_client_limit = 2500 default_process_limit = 500 default_vsz_limit = 4 G hostname = post.somedomain.org imap_capability = +SPECIAL_USE imap_fetch_failure = no-after imap_hibernate_timeout = 15 secs imap_idle_notify_interval = 4 mins imap_max_line_length = 512 k lda_mailbox_autocreate = yes lda_mailbox_autosubscribe = yes lda_original_recipient_header = X-Original-To listen = * lmtp_rcpt_check_quota = yes login_log_format_elements = user=<%u> method=%m rip=%r lip=%l mpid=%e %c %k mail_cache_min_mail_count = 15 mail_fsync = never mail_location = maildir:/mailstore/%d/%2n/%n:INDEX=/indexes/%d/%2n/%n:INBOX=/mailstore/%d/%2n/%n/.INBOX:VOLATILEDIR=/tmp/dovecot:NO-NOSELECT:UTF-8 mail_max_keyword_length = 100 mail_plugins = quota zlib listescape mail_prefetch_count = 20 mail_privileged_group = mail mail_temp_scan_interval = 0 mailbox_idle_check_interval = 55 secs mailbox_list_index_include_inbox = yes mailbox_list_index_very_dirty_syncs = yes maildir_broken_filename_sizes = yes maildir_very_dirty_syncs = yes namespace inbox { inbox = yes location = mailbox Concepts { auto = no special_use = \Drafts } mailbox "Deleted Messages" { auto = no special_use = \Trash } mailbox Drafts { auto = subscribe special_use = \Drafts } mailbox Junk { auto = no special_use = \Junk } mailbox Sent { auto = subscribe special_use = \Sent } mailbox "Sent Messages" { auto = no special_use = \Sent } mailbox Trash { auto = subscribe special_use = \Trash } prefix = separator = / type = private } passdb { args = /etc/dovecot/passwd--%d driver = passwd-file } plugin { listescape_char = } quota = maildir:User quota quota_grace = 45M quota_rule = *:storage=8G quota_rule2 = Trash:storage=+100M quota_status_overquota = 552 5.2.2 User mailbox is full.. quota_status_succes = DUNNO quota_warning = storage=100%% quota-warning 100 %u quota_warning10 = storage=70%% quota-warning 70 %u quota_warning11 = -storage=100%% quota-warning 0 %u quota_warning2 = storage=99%% quota-warning 99 %u quota_warning3 = storage=98%% quota-warning 98 %u quota_warning4 = storage=96%% quota-warning 96 %u quota_warning5 = storage=94%% quota-warning 94 %u quota_warning6 = storage=92%% quota-warning 92 %u quota_warning7 = storage=90%% quota-warning 90 %u quota_warning8 = storage=85%% quota-warning 85 %u quota_warning9 = storage=80%% quota-warning 80 %u sieve = ~/dovecot.sieve sieve_extensions = +notify +imapflags +envelope +vacation +fileinto +date +relational +vacation-seconds sieve_user_log = /dev/null sieve_vacation_min_period = 1h sieve_vacation_send_from_recipient = yes virtual_overquota_bounce = yes zlib_save = gz zlib_save_level = 3 } pop3_fast_size_lookups = yes protocols = imap lmtp pop3 service auth-worker { user = $default_internal_user } service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0660 user = postfix } } service imap-hibernate { unix_listener imap-hibernate { group = $default_internal_group mode = 0660 } } service imap-login { inet_listener imap { port = 0 } inet_listener imaps { address = 100.100.100.104 port = 993 ssl = yes } process_min_avail = 20 service_count = 0 } service imap { extra_groups = $default_internal_group process_limit = 5000 unix_listener imap-master { user = $default_internal_user } } service lmtp { unix_listener /var/spool/postfix/private/dovecot-lmtp { group = postfix mode = 0600 user = postfix } } service pop3-login { inet_listener pop3 { port = 0 } inet_listener pop3s { address = 100.100.100.99 port = 995 ssl = yes } process_min_avail = 10 service_count = 0 } service pop3 { process_limit = 1000 } service quota-warning { executable = script /etc/dovecot/quota-warning.sh unix_listener quota-warning { user = vmail } user = vmail } service submission-login { inet_listener submission { address = 127.0.0.1 port = 587 ssl = yes } process_min_avail = 5 service_count = 1 } service submission { process_limit = 150 } ssl = required ssl_cert = </etc/ssl/private/somedomain.org.crta ssl_cipher_list = ALL:!SSLv2:!SSLv3:!DH:!kRSA:!SRP:!kDHd:!DSS:!aNULL:!eNULL:!EXPORT:!DES:!3DES:!MD5:!PSK:!RC4:!ADH:!LOW@STRENGTH:!EXP:!SEED:!IDEA:!RSA:!CAMELLIA:!SHA1:!SHA256:!SHA384 ssl_client_ca_dir = /etc/ssl/certs ssl_dh = # hidden, use -P to show it ssl_key = # hidden, use -P to show it ssl_min_protocol = TLSv1.2 ssl_prefer_server_ciphers = yes submission_host = 127.0.0.1 syslog_facility = local2 userdb { args = /etc/dovecot/passwd--%d driver = passwd-file result_failure = return-fail result_internalfail = return-fail } valid_chroot_dirs = /var/spool/vmail verbose_proctitle = yes protocol lmtp { mail_fsync = optimized mail_plugins = quota zlib listescape quota sieve zlib postmaster_address = postmaster(a)somedomain.org } protocol lda { mail_fsync = optimized } protocol imap { mail_max_userip_connections = 25 mail_plugins = quota zlib listescape imap_quota zlib } protocol pop3 { mail_max_userip_connections = 6 }

2 1

doveadm backup Error: Mailbox INBOX sync
by Pierre Sablé 13 Jul '21

13 Jul '21

Hi, the command "doveadm backup -u {user@mail} maildir:/home/backup/{user@mail}/mails/" returns the following error : dsync(user@mail): Error: Mailbox INBOX sync: mailbox_delete failed: INBOX can't be deleted. ...and nothing in dovecot logs dovecot actual version 2.3.15 I did not have this pb in dovecot 2.3.2 /Should this be considered a bug report?/ -- Pierre Sablé Formateur & Administrateur Systèmes Linux - DevOps Tel : 07.63.88.76.21 psable(a)dawan.fr www.dawan.fr

1 0

[ENHANCEMENT] Doveadm HTTP API and the mail-crypt plugin
by Kevin N. 13 Jul '21

13 Jul '21

Hello everybody, I was wondering, are there any plans for the near future to include the mail-crypt plugin related functions, like changing the user key password, into the doveadm http api? It would probably be possible to implement it in a more secure way than any other external ad-hoc solution. Wouldn't it? Cheers, K.

2 2

getting rid of the passwd file unknown user messages
by Marc 12 Jul '21

12 Jul '21

I have configured a userdb file, so I can test with some accounts and override settings. But it is a bit annoying getting unkown user messages for the majority of accounts not in this userdb. Is there a way to skip this reporting? dovecot: auth: passwd-file(aaaaaaaaaaaa,X.X.X.X,<lGapvOzGS5tNPz8/>): unknown user

2 3

Mailbox lost
by Stephane Magnier 12 Jul '21

12 Jul '21

Hi, Any idea why * * *list "" * *-> displays all I want to see but *lsub "" ** -> doesn't display anything ? and AFAIK, this is what I need to get in order any Email clients see my folders ? - Correct ? how can I make visible, by "lsub" all my folders ? Thanks and regards,

4 4

doveadm altmove -r still broken in 2.3.15
by María Arrea 12 Jul '21

12 Jul '21

2 1

High Availability Dovecot / Roundcube / PostfixAdmin ?
by White, Daniel E. (GSFC-770.0)[NICS] 12 Jul '21

12 Jul '21

This is a new setup, running on RHEL 8 with the latest everything. Has anyone out there set up a high availability pair of Dovecot servers - with Roundcube and PostfixAdmin - successfully ? "Callahan's Law: Shared pain is lessened; shared joy, increased — thus do we refute entropy" (Spider Robinson)

4 3

Sieve vacation + SRS + forwarded e-mail
by Saarts, Erik 10 Jul '21

10 Jul '21

Hello! Having a problem here and am unable to solve it on my own and even dr Google is unable to help. We have domain A on cloud, from where mail gets forwarded to our local server to domain B. Forwarding is done in SPF-compliant way by using SRS (this part we have no control over). This SRS address ends up in Return-Path header, and sieve vacation replies to this address. This is all absolutely correct, but also useless, as sending mail to SRS address leads nowhere. I've tried to edit headers in sieve before passing control to vacation, but that does not work. I tried modifying Return-Path to the value of X-Original-Sender (both in user's sieve file and using scripts in "sieve_before" parameter). Mail gets delivered with changed headers, but vacation acts upon original headers. Is there a workaround? MTA is postfix (3.1.15), dovecot is version 2.3.4.1 (f79e8e7e4), Pigeonhole version 0.5.4 LMTP as local delivery agent. Erik

2 1

Nabble
by Plutocrat 10 Jul '21

10 Jul '21

Not sure if this is an issue, but Nabble seems to have stopped archiving this newsgroup around 22 Jun. http://dovecot.2317879.n4.nabble.com/ Thought I should probably tell someone P.

1 0

Dovecot silently discards duplicates?
by dovecot＠ptld.com 09 Jul '21

09 Jul '21

I setup an alias(a)example.com in postfix to point at me(a)example.com I send one email to me(a)example.com and alias(a)example.com, tried both ways of using CC and putting both addresses in the To field. I see in postfix logs that it delivers two messages to dovecot-lmtp. However i only get one copy of the email in my inbox. I assume dovecot is detecting duplicate emails going to the same location and just discarding one of them. Is there a setting to control this behavior? Can dovecot be told to deliver what it was given and not decide to discard?

1 0

dsync replication fails with No space left on device / Out of memory
by Steven Varco 08 Jul '21

08 Jul '21

Hi All Since I configured dsync replication I get strange errors in the maillog on my two mail dovecot nodes: PRIMARY: Jul 2 01:21:42 mx01.example.com dovecot: doveadm: Error: read(mx02.example.com) failed: read(size=3148) failed: Connection reset by peer (last sent=mail, last recv=mail (EOL)) The secondary is more interesting: SECONDARY Jul 2 01:21:42 mx02 dovecot: doveadm: Error: close(-1[istream-seekable.c:237]) failed: No space left on device Jul 2 01:21:43 mx02 dovecot: doveadm: Fatal: pool_system_realloc(268435456): Out of memory Jul 2 01:21:43 mx02 dovecot: doveadm: Error: Raw backtrace: /usr/lib64/dovecot/libdovecot.so.0(+0xa192e) [0x7f2e9be4c92e] -> /usr/lib64/dovecot/libdovecot.so.0(+0xa1a0e) [0x7f2e9be4ca0e] -> /usr/lib64/dovecot/libdovecot.so.0(i_error+0) [0x7f2e9bddc3d3] -> /usr/lib64/dovecot/libdo Jul 2 01:21:43 mx02 dovecot: doveadm: Fatal: master: service(doveadm): child 2876 returned error 83 (Out of memory (service doveadm { vsz_limit=256 MB }, you may need to increase it) - set CORE_OUTOFMEM=1 environment to get core dump) Jul 2 01:21:51 mx02 dovecot: dsync-local(user(a)example.com): Error: Raw backtrace: /usr/lib64/dovecot/libdovecot.so.0(+0xa192e) [0x7fd56e17e92e] -> /usr/lib64/dovecot/libdovecot.so.0(+0xa1a0e) [0x7fd56e17ea0e] -> /usr/lib64/dovecot/libdovecot.so.0(i_error+0) [0x7fd56e10e3d3] -> /us Jul 2 01:21:51 mx02 dovecot: dsync-local(user(a)example.com): Fatal: master: service(doveadm): child 2882 returned error 83 (Out of memory (service doveadm { vsz_limit=256 MB }, you may need to increase it) - set CORE_OUTOFMEM=1 environment to get core dump) The error messages state that disk space and/or memory is a problem, but disk space and memory is enough available: mx02 [~] # df -h /srv/mail/ Filesystem Size Used Avail Use% Mounted on /dev/mapper/system-mail 10G 5.7G 4.3G 58% /srv/mail mx02 [~] # free -m total used free shared buff/cache available Mem: 3789 1602 1088 199 1097 1759 Swap: 471 93 378 I also tried to increase vsz_limit from 256 MB to 512 MB, which did not help. And for the sake of completness also the connection to the doveadm port works well from both nodes: mx01-prod [~] # telnet mx02 14310 Trying 172.20.19.225... Connected to mx02. Escape character is '^]'. ^] mx02 [~] # telnet mx01 14310 Trying 172.20.19.251... Connected to mx01. Escape character is '^]'. ^] Although mail replication seems to be working properly and mails are in sync on both nodes (as what I could see), I would like to find the cause of this messages, as this does definetely don’t look normal… I’m grateful for any help, since I’m quite on a struggle now… Steven Here’s my config -------------------------------------------------------------------------------- # doveconf -n # 2.2.36 (1f10bfa63): /etc/dovecot/dovecot.conf # Pigeonhole version 0.4.24 (124e06aa) # OS: Linux 3.10.0-1160.31.1.el7.x86_64 x86_64 CentOS Linux release 7.9.2009 (Core) # Hostname: mx01.example.com auth_mechanisms = plain login auth_verbose = yes dict { sqlquota = mysql:/etc/dovecot/dict-sqlquota.conf.ext } doveadm_password = # hidden, use -P to show it doveadm_port = 14310 first_valid_uid = 1000 mail_plugins = quota notify replication managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date index ihave duplicate mime foreverypart extracttext mbox_write_locks = fcntl namespace inbox { inbox = yes location = mailbox Drafts { special_use = \Drafts } mailbox Junk { special_use = \Junk } mailbox Sent { special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Trash { special_use = \Trash } prefix = separator = / type = private } passdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } plugin { mail_replica = tcp:mx02.example.com quota = maildir:User quota quota_exceeded_message = Quota exceeded, please go to http://www.example.com/over_quota_help for instructions on how to fix this. quota_rule2 = INBOX.Trash:storage=+100M quota_status_nouser = DUNNO quota_status_overquota = 552 5.2.2 Mailbox is full / Mailbox ist voll quota_status_success = DUNNO quota_warning = storage=90%% quota-warning 90 %u quota_warning2 = -storage=90%% quota-warning below %u sieve = file:~/sieve;active=~/.dovecot.sieve } postmaster_address = postmaster(a)example.com protocols = imap pop3 lmtp sieve replication_dsync_parameters = -d -l 30 -U service aggregator { fifo_listener replication-notify-fifo { user = vmail } unix_listener replication-notify { user = vmail } } service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0660 user = postfix } unix_listener auth-userdb { user = vmail } } service dict { unix_listener dict { user = vmail } } service doveadm { inet_listener { port = 14310 ssl = no } } service managesieve-login { inet_listener sieve { port = 4190 } } service quota-status { client_limit = 1 executable = quota-status -p postfix inet_listener { port = 14340 } } service quota-warning { executable = script /usr/local/libexec/dovecot/quota-warning.sh unix_listener quota-warning { user = vmail } user = vmail } service replicator { process_min_avail = 1 unix_listener replicator-doveadm { mode = 0600 user = vmail } } ssl = required ssl_cert = </etc/ssl/acme/certs/mail.example.com.chain.crt ssl_key = # hidden, use -P to show it userdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } verbose_proctitle = yes protocol lmtp { mail_plugins = quota notify replication sieve } protocol lda { mail_plugins = quota notify replication sieve } protocol imap { mail_max_userip_connections = 20 mail_plugins = quota notify replication imap_quota } -------------------------------------------------------------------------------- mx02.example.com has exact the same config, except of: -------------------------------------------------------------------------------- plugin { mail_replica = tcp:mx01.example.com -------------------------------------------------------------------------------- — https://steven.varco.ch/ https://www.tech-island.com/

5 6

Deleting an active sieve script leaves sieve unfunctional
by Tobias Leupold 07 Jul '21

07 Jul '21

Dear devs, I noticed this using Dovecot 2.3.7.2, set up on a newly created Ubuntu 20.04 server. If I delete a sieve script via KMail's managesieve interface, and the script is active, it leaves sieve unfunctional afterwards. What's happening is this: Dovecot creates a USER.sieve script containing all active scripts, e. g.: require ["include"]; include :personal "some-script"; include :personal "some-other-script"; Now if I delete "some-script", it's actually deleted, but USER.sieve is not updated (and still contains 'include :personal "some-script";'). So next time an email is filtered, this happens: mail log: Jul 5 15:20:01 server dovecot: lda(user@domain)<123456> <xxxxxxxxxxxxxxxxxxxxxx>: sieve: Failed to compile script `/srv/sieve/user(a)domain/active-script.sieve' (view user logfile `/srv/sieve/user(a)domain/active-script.sieve.log' for more information) active-script.sieve.log: sieve: info: started log at Jul 05 14:57:54. USER: line 12: error: included personal script 'some_script' does not exist. USER: error: validation failed. So, to avoid this, one has to FIRST deactivate the respectice script, so that USER.sieve is updated and THEN delete the script. Or to manually fix USER.sieve on the server, which is surely not what's intended. So the question is now: Is this a KMail bug, a Doveceot bug, or is the server misconfigured?! Thanks for all help! Cheers, Tobias

6 13

Postfix / Dovecot Not Able to Authenticate
by techlists＠phpcoderusa.com 06 Jul '21

06 Jul '21

Hi My name is Keith Smith. I am a PHP developer and have been a freelance PHP developer since 2006. I have been working on a PHP web server in the hope of learning more about Linux hosting server administration. Over the years I have had the opportunity to create many PHP virtual hosts. I have not worked with or configured BIND, Postfix, and Dovecot before about 3 weeks ago. My home server is connected to the Internet via my home office business cable account. No blocked ports and I am able run one or more servers. I am running Ubuntu 20.04lts / Apache / MySql (or a clone) / PHP / BIND9 / Postfix / Dovecot / Let's Encrypt SSL. My server’s FQDN is : soho.keiththewebguy.com as is my reverse lookup on my IP : 98.191.108.149. The purpose is for learning. I intend to run one such configured server out of my home office running one domain or more (virtual hosts) and would like to configure Postfix/Dovecot to service one or more email addresses per virtual hosting. I have BIND working. At least enough that a simple web page can be displayed. I've installed Postfix and Dovecot and am getting an authentication issue that shows up in the logs. I do not know all that you might need. Please let me know. I admit I find Postfix and Dovecot difficult to understand. I am at the newbie stage. I've scoured the Internet looking for answers. After I configured Postfix and Dovecot I issued the commend : telnet keiththewebguy.com 25 on my web server. It returned: Trying 98.191.108.149... Connected to keiththewebguy.com. Escape character is '^]'. 220 soho.keiththewebguy.com ESMTP Postfix I issued : ehlo soho.keiththewebguy.com 250-soho.keiththewebguy.com 250-PIPELINING 250-SIZE 10240000 250-VRFY 250-ETRN 250-STARTTLS 250-AUTH PLAIN LOGIN 250-ENHANCEDSTATUSCODES 250-8BITMIME 250-DSN 250 CHUNKING I issued : quit 221 2.0.0 Bye Connection closed by foreign host. --- I assume this means things are configured correctly. I am looking at both logs: 1) /var/log/mail.err which contains no content. 2) /var/log/mail.log which is verbose. To /etc/dovecot/dovecot.conf I added the following for debugging: auth_verbose = yes auth_verbose_passwords = no auth_debug = yes auth_debug_passwords = yes mail_debug = yes verbose_ssl = yes I am trying to connect using Thunderbird. Config: IMAP port 993 / ssl/TLS / Normal Password / username : keith(a)keiththewebguy.com and password that is in /etc/dovecot/dovecot-users SMTP port 25 / STARTTLS / Normal Password / username : keith(a)keiththewebguy.com and password that is in /etc/dovecot/dovecot-users Thunderbird tests these configurations and reports them as found on the server. When I press the done button to create the email account I get a message "Unable to log into the server. Probably wrong configuration, username, or password.". The output when trying to create the Thunderbird account: /var/log/mail.log =============== Jul 5 18:58:35 soho dovecot: imap-login: Debug: SSL: where=0x10, ret=1: before SSL initialization Jul 5 18:58:35 soho dovecot: imap-login: Debug: SSL: where=0x2001, ret=1: before SSL initialization Jul 5 18:58:35 soho dovecot: imap-login: Debug: SSL: where=0x2002, ret=-1: before SSL initialization Jul 5 18:58:35 soho dovecot: imap-login: Debug: SSL: where=0x2001, ret=1: before SSL initialization Jul 5 18:58:35 soho dovecot: imap-login: Debug: SSL: where=0x2001, ret=1: SSLv3/TLS read client hello Jul 5 18:58:35 soho dovecot: imap-login: Debug: SSL: where=0x2001, ret=1: SSLv3/TLS write server hello Jul 5 18:58:35 soho dovecot: imap-login: Debug: SSL: where=0x2001, ret=1: SSLv3/TLS write certificate Jul 5 18:58:35 soho dovecot: imap-login: Debug: SSL: where=0x2001, ret=1: SSLv3/TLS write key exchange Jul 5 18:58:35 soho dovecot: imap-login: Debug: SSL: where=0x2001, ret=1: SSLv3/TLS write server done Jul 5 18:58:35 soho dovecot: imap-login: Debug: SSL: where=0x2002, ret=-1: SSLv3/TLS write server done Jul 5 18:58:35 soho dovecot: message repeated 2 times: [ imap-login: Debug: SSL: where=0x2002, ret=-1: SSLv3/TLS write server done] Jul 5 18:58:35 soho dovecot: imap-login: Debug: SSL: where=0x2001, ret=1: SSLv3/TLS write server done Jul 5 18:58:35 soho dovecot: imap-login: Debug: SSL: where=0x2001, ret=1: SSLv3/TLS read client key exchange Jul 5 18:58:35 soho dovecot: imap-login: Debug: SSL: where=0x2001, ret=1: SSLv3/TLS read change cipher spec Jul 5 18:58:35 soho dovecot: imap-login: Debug: SSL: where=0x2001, ret=1: SSLv3/TLS read finished Jul 5 18:58:35 soho dovecot: imap-login: Debug: SSL: where=0x2001, ret=1: SSLv3/TLS write session ticket Jul 5 18:58:35 soho dovecot: imap-login: Debug: SSL: where=0x2001, ret=1: SSLv3/TLS write change cipher spec Jul 5 18:58:35 soho dovecot: imap-login: Debug: SSL: where=0x2001, ret=1: SSLv3/TLS write finished Jul 5 18:58:35 soho dovecot: imap-login: Debug: SSL: where=0x20, ret=1: SSL negotiation finished successfully Jul 5 18:58:35 soho dovecot: imap-login: Debug: SSL: where=0x2002, ret=1: SSL negotiation finished successfully Jul 5 18:58:35 soho dovecot: auth: Debug: Loading modules from directory: /usr/lib/dovecot/modules/auth Jul 5 18:58:35 soho dovecot: auth: Debug: Module loaded: /usr/lib/dovecot/modules/auth/lib20_auth_var_expand_crypt.so Jul 5 18:58:35 soho dovecot: auth: Debug: Read auth token secret from /var/run/dovecot/auth-token-secret.dat Jul 5 18:58:35 soho dovecot: auth: Debug: passwd-file /etc/dovecot/dovecot-users: Read 1 users in 0 secs Jul 5 18:58:35 soho dovecot: auth: Debug: auth client connected (pid=2021) Jul 5 18:58:35 soho dovecot: auth: Debug: client in: AUTH#0111#011PLAIN#011service=imap#011secured=tls#011session=wVJ55GTGvspiv2yV#011lip=192.168.1.10#011rip=98.191.108.149#011lport=993#011rport=51902#011local_name=mail.keiththewebguy.com#011ssl_cipher=ECDHE-RSA-AES128-GCM-SHA256#011ssl_cipher_bits=128#011ssl_pfs=KxECDHE#011ssl_protocol=TLSv1.2 Jul 5 18:58:35 soho dovecot: auth: Debug: client passdb out: CONT#0111#011 Jul 5 18:58:35 soho dovecot: auth: Debug: client in: CONT#0111#011AGtlaXRoQGtlaXRodGhld2ViZ3V5LmNvbQBJY2VjcmVhbS1Db25lXjIx (previous base64 data may contain sensitive data) Jul 5 18:58:35 soho dovecot: auth: Debug: passwd-file(keith(a)keiththewebguy.com,98.191.108.149,<wVJ55GTGvspiv2yV>): Performing passdb lookup Jul 5 18:58:35 soho dovecot: auth: Debug: passwd-file(keith(a)keiththewebguy.com,98.191.108.149,<wVJ55GTGvspiv2yV>): lookup: user=keith(a)keiththewebguy.com file=/etc/dovecot/dovecot-users Jul 5 18:58:35 soho dovecot: auth: passwd-file(keith(a)keiththewebguy.com,98.191.108.149,<wVJ55GTGvspiv2yV>): unknown user Jul 5 18:58:35 soho dovecot: auth: Debug: passwd-file(keith(a)keiththewebguy.com,98.191.108.149,<wVJ55GTGvspiv2yV>): Finished passdb lookup Jul 5 18:58:35 soho dovecot: auth: Debug: auth(keith(a)keiththewebguy.com,98.191.108.149,<wVJ55GTGvspiv2yV>): Auth request finished Jul 5 18:58:37 soho dovecot: auth: Debug: client passdb out: FAIL#0111#011user=keith(a)keiththewebguy.com Jul 5 18:58:37 soho dovecot: auth: Debug: client in: AUTH#0112#011LOGIN#011service=imap#011secured=tls#011session=wVJ55GTGvspiv2yV#011lip=192.168.1.10#011rip=98.191.108.149#011lport=993#011rport=51902#011local_name=mail.keiththewebguy.com#011ssl_cipher=ECDHE-RSA-AES128-GCM-SHA256#011ssl_cipher_bits=128#011ssl_pfs=KxECDHE#011ssl_protocol=TLSv1.2 Jul 5 18:58:41 soho dovecot: auth: Debug: client passdb out: CONT#0112#011VXNlcm5hbWU6 Jul 5 18:58:41 soho dovecot: auth: Debug: client in: CONT#0112#011a2VpdGhAa2VpdGh0aGV3ZWJndXkuY29t (previous base64 data may contain sensitive data) Jul 5 18:58:41 soho dovecot: auth: Debug: client passdb out: CONT#0112#011UGFzc3dvcmQ6 Jul 5 18:58:41 soho dovecot: auth: Debug: client in: CONT#0112#011SWNlY3JlYW0tQ29uZV4yMQ== (previous base64 data may contain sensitive data) Jul 5 18:58:41 soho dovecot: auth: Debug: passwd-file(keith(a)keiththewebguy.com,98.191.108.149,<wVJ55GTGvspiv2yV>): Performing passdb lookup Jul 5 18:58:41 soho dovecot: auth: Debug: passwd-file(keith(a)keiththewebguy.com,98.191.108.149,<wVJ55GTGvspiv2yV>): lookup: user=keith(a)keiththewebguy.com file=/etc/dovecot/dovecot-users Jul 5 18:58:41 soho dovecot: auth: passwd-file(keith(a)keiththewebguy.com,98.191.108.149,<wVJ55GTGvspiv2yV>): unknown user Jul 5 18:58:41 soho dovecot: auth: Debug: passwd-file(keith(a)keiththewebguy.com,98.191.108.149,<wVJ55GTGvspiv2yV>): Finished passdb lookup Jul 5 18:58:41 soho dovecot: auth: Debug: auth(keith(a)keiththewebguy.com,98.191.108.149,<wVJ55GTGvspiv2yV>): Auth request finished Jul 5 18:58:43 soho dovecot: auth: Debug: client passdb out: FAIL#0112#011user=keith(a)keiththewebguy.com Jul 5 18:58:43 soho dovecot: auth: Debug: client in: AUTH#0113#011PLAIN#011service=imap#011secured=tls#011session=wVJ55GTGvspiv2yV#011lip=192.168.1.10#011rip=98.191.108.149#011lport=993#011rport=51902#011local_name=mail.keiththewebguy.com#011ssl_cipher=ECDHE-RSA-AES128-GCM-SHA256#011ssl_cipher_bits=128#011ssl_pfs=KxECDHE#011ssl_protocol=TLSv1.2#011resp=AGtlaXRoQGtlaXRodGhld2ViZ3V5LmNvbQBJY2VjcmVhbS1Db25lXjIx (previous base64 data may contain sensitive data) Jul 5 18:58:47 soho dovecot: auth: Debug: passwd-file(keith(a)keiththewebguy.com,98.191.108.149,<wVJ55GTGvspiv2yV>): Performing passdb lookup Jul 5 18:58:47 soho dovecot: auth: Debug: passwd-file(keith(a)keiththewebguy.com,98.191.108.149,<wVJ55GTGvspiv2yV>): lookup: user=keith(a)keiththewebguy.com file=/etc/dovecot/dovecot-users Jul 5 18:58:47 soho dovecot: auth: passwd-file(keith(a)keiththewebguy.com,98.191.108.149,<wVJ55GTGvspiv2yV>): unknown user Jul 5 18:58:47 soho dovecot: auth: Debug: passwd-file(keith(a)keiththewebguy.com,98.191.108.149,<wVJ55GTGvspiv2yV>): Finished passdb lookup Jul 5 18:58:47 soho dovecot: auth: Debug: auth(keith(a)keiththewebguy.com,98.191.108.149,<wVJ55GTGvspiv2yV>): Auth request finished Jul 5 18:58:49 soho dovecot: auth: Debug: client passdb out: FAIL#0113#011user=keith(a)keiththewebguy.com Jul 5 18:58:49 soho dovecot: imap-login: Debug: SSL alert: close notify Jul 5 18:58:49 soho dovecot: imap-login: Disconnected (auth failed, 3 attempts in 14 secs): user=<keith(a)keiththewebguy.com>, method=PLAIN, rip=98.191.108.149, lip=192.168.1.10, TLS, session=<wVJ55GTGvspiv2yV> Jul 5 18:58:49 soho dovecot: imap-login: Debug: SSL alert: close notify ================== I see the following lines: passwd-file /etc/dovecot/dovecot-users: Read 1 users in 0 secs passwd-file(keith(a)keiththewebguy.com,98.191.108.149,<wVJ55GTGvspiv2yV>): Performing passdb lookup passwd-file(keith(a)keiththewebguy.com,98.191.108.149,<wVJ55GTGvspiv2yV>): lookup: user=keith(a)keiththewebguy.com file=/etc/dovecot/dovecot-users file(keith(a)keiththewebguy.com,98.191.108.149,<wVJ55GTGvspiv2yV>): unknown user passwd-file(keith(a)keiththewebguy.com,98.191.108.149,<wVJ55GTGvspiv2yV>): Finished passdb lookup auth(keith(a)keiththewebguy.com,98.191.108.149,<wVJ55GTGvspiv2yV>): Auth request finished client passdb out: FAIL#0111#011user=keith(a)keiththewebguy.com - - - - dovecot -n : # 2.3.7.2 (3c910f64b): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.7.2 () # OS: Linux 5.4.0-77-generic x86_64 Ubuntu 20.04.2 LTS ext4 # Hostname: soho.keiththewebguy.com auth_debug = yes auth_debug_passwords = yes auth_mechanisms = plain login auth_verbose = yes mail_debug = yes mail_location = maildir:/var/mail/vhosts/%d/%n mail_privileged_group = mail namespace inbox { inbox = yes location = mailbox Drafts { special_use = \Drafts } mailbox Junk { special_use = \Junk } mailbox Sent { special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Trash { special_use = \Trash } prefix = } passdb { args = scheme=PLAIN username_format=%u /etc/dovecot/dovecot-users driver = passwd-file } protocols = " imap lmtp pop3" service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0666 user = postfix } } service imap-login { inet_listener imaps { port = 993 ssl = yes } } service lmtp { unix_listener /var/spool/postfix/private/dovecot-lmtp { group = postfix mode = 0600 user = postfix } } ssl = required ssl_cert = </etc/letsencrypt/live/keiththewebguy.com/fullchain.pem ssl_client_ca_dir = /etc/ssl/certs ssl_dh = # hidden, use -P to show it ssl_key = # hidden, use -P to show it userdb { args = uid=vmail gid=vmail home=/var/mail/vhosts/%d/%n driver = static } verbose_ssl = yes - - - Any thoughts are most welcome!! Thanks in advance!!

2 5

master - master syncronization: *-temp-1-temp-1-temp-2-* recursion
by Heiko Schlittermann 05 Jul '21

05 Jul '21

Hi, I'm using dovecot 2.3.4.1 (f79e8e7e4) (Debian Build) and doing master/master replication. Recently we added a huuge .Archive* folder structure to the items being replicated. And now, suddenly we see new folders with a naming like *-temp-1-temp-1-temp-2-* appearing. This finally lead to infinite recursion until the replicator crashed. I've a theory, but please see below (**) for influence from outside of dovecot: SiteA starts replication of a huge .Archive folder, which doesn't exist on siteB yet A B .Archive ----> .Archive-temp-1 Because it takes ages to sync, the replicator on siteB now sees the new .Archive-temp-1 folder and starts replicating this back to siteA .Archive-temp-1-temp-1 <----- .Archive-temp-1 If now the replicator on siteA hits that new folder, it starts replicating it to site B .Archive-temp-1-temp-1 ----> .Archive-temp-1-temp-1-temp-2 … and so on. Sometimes the digit is "2", or even "3". I didn't check the Dovecot source yet, if the Replicator fails to skip the temporary folders it gets "injected" from the other side. (**) Possible external influence: On siteA a cronjob once per day moves the .Archive* folders to another filesystem and replaces the .Archive* directory with a symlink. This script "touches" the dovecot-uidlist.lock prior to its action (but doesn't check if there is already a lock). Could this mailbox move *behind* the back of the replicator be a reason for the odd behaviour? Additional info: On *both* nodes the config looks like this: doveadm_password = <password> service doveadm { inet_listener { port = 9090 ssl = yes } } replication_max_conns = 16 plugin { mail_replica = tcps:<other site>:9090 } service replicator { process_min_avail = 1 unix_listener replicator-doveadm { mode = 0666 user = dovecot } } service aggregator { fifo_listener replication-notify-fifo { mode = 0666 user = dovecot } unix_listener replication-notify { mode = 0666 user = dovecot } }

1 0

Duplicate users with multiple userdb iteration
by Slavko 05 Jul '21

05 Jul '21

Hi, recently i decided to use quota_over_flag with passwd_file userdb. The main idea is to prevent dovecot (or vmail) user to have write access to file with passwords. To do it, i setup separate userdb as this (SQL userdb is SQLite based, thus the same problem with write): passdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } userdb { args = username_format=%u /etc/dovecot/over_quota default_fields = quota_over_flag=1 driver = passwd-file result_internalfail = continue-fail result_success = continue-fail } userdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } For testing i add one user into over_quota file: slavko(a)slavino.eu::::::: With this setting the doveadm user with user in over_quota seems to work: doveadm user slavko(a)slavino.eu field value uid 20000 gid 20000 home /srv/vmail/slavino.eu/slavko mail maildir:~/Maildir quota_over_flag 1 quota_rule *:storage=0M quota2_rule *:storage=0M But the user iteration shows duplicate users: doveadm user '*' slavko(a)slavino.eu slavko(a)slavino.eu ... As we discussed on IRC, it is how iteration works, as it emit users as soon as it meet it, but this doesn't correspond with "multiple userdb are merged" in docs (for iteration). I am surprised by this mainly because the particular userdb has set result_success to "continue-fail" and thus have to set user not found as with any user, which is not in this db. But it seems, that iteration ignores this result. I wrote this as we discussed via IRC, i am not subscribed, thus please CC me. regards -- Slavko http://slavino.sk

1 0

Re: Re: lost mailbox
by Stephane Magnier 05 Jul '21

05 Jul '21

Hi , Thanks Erwan, Yes I did it.. what worries me is, that that instruction lsub "" * seems not to work.. I mean I am not allowed to see it b lsub "" * b NO [NOPERM] No permission to read subscriptions (0.001 + 0.000 secs). So not sure that this is the fault of Thunderbird :-) Thanks for your help

2 1

Pb with Dovecot and visble folders
by Stephane Magnier 04 Jul '21

04 Jul '21

Hi, I've got a problem with my Dovecot installation.. Up to now, that was working fine.but today [root@mbox admin]# telnet localhost 143 Trying ::1... telnet: connect to address ::1: Connection refused Trying 127.0.0.1... Connected to localhost. Escape character is '^]'. * OK [CAPABILITY IMAP4rev1 SASL-IR LOGIN-REFERRALS ID ENABLE IDLE LITERAL+ STARTTLS AUTH=PLAIN] Dovecot ready. a login azt000 xxxxxx a OK [CAPABILITY IMAP4rev1 SASL-IR LOGIN-REFERRALS ID ENABLE IDLE SORT SORT=DISPLAY THREAD=REFERENCES THREAD=REFS THREAD=ORDEREDSUBJECT MULTIAPPEND URL-PARTIAL CATENATE UNSELECT CHILDREN NAMESPACE UIDPLUS LIST-EXTENDED I18NLEVEL=1 CONDSTORE QRESYNC ESEARCH ESORT SEARCHRES WITHIN CONTEXT=SEARCH LIST-STATUS BINARY MOVE SNIPPET=FUZZY PREVIEW=FUZZY LITERAL+ NOTIFY SPECIAL-USE QUOTA] Logged in b list "" * * LIST (\NoInferiors \UnMarked) "/" ssss * LIST (\NoInferiors \UnMarked) "/" 2021-TEST * LIST (\NoInferiors \UnMarked) "/" 2015 * LIST (\NoInferiors \UnMarked) "/" 2020-IT * LIST (\NoInferiors \UnMarked) "/" 2018-PERSO * LIST (\NoInferiors \UnMarked) "/" 2017 * LIST (\NoInferiors \UnMarked) "/" 2020-MARKETING * LIST (\NoInferiors \UnMarked) "/" 2019-AZT * LIST (\NoInferiors \UnMarked) "/" 2019-ADMIN * LIST (\NoInferiors \UnMarked) "/" "2020- PERSO" * LIST (\NoInferiors \UnMarked) "/" sss * LIST (\NoInferiors \UnMarked) "/" 2019-COMPTA * LIST (\NoInferiors \UnMarked) "/" 2019-PERSO * LIST (\NoInferiors \UnMarked) "/" 2017-ADMIN * LIST (\NoInferiors \UnMarked) "/" 2016 * LIST (\NoInferiors \UnMarked) "/" 2020-compta * LIST (\NoInferiors \Marked \Trash) "/" Trash * LIST (\NoInferiors \UnMarked) "/" Archives * LIST (\NoInferiors \UnMarked \Sent) "/" Sent * LIST (\NoInferiors \Marked \Junk) "/" Junk * LIST (\NoInferiors \UnMarked \Drafts) "/" Drafts * LIST (\NoInferiors \UnMarked \Sent) "/" "Sent Messages" * LIST (\NoInferiors \UnMarked) "/" INBOX/2021-AZT * LIST (\NoInferiors \UnMarked) "/" INBOX/2021-WebMEETING * LIST (\NoInferiors \UnMarked) "/" INBOX/2021-zezez * LIST (\NoInferiors \UnMarked) "/" INBOX/2021-PERSO * LIST (\NoInferiors \UnMarked) "/" INBOX/2021-MARKETING * LIST (\NoInferiors \UnMarked) "/" INBOX/2021-COMPTA * LIST (\NoInferiors \UnMarked) "/" INBOX/2021-ADMIN * LIST (\NoInferiors \UnMarked) "/" INBOX/2021-ATV * LIST (\NoInferiors \UnMarked) "/" INBOX/2021-test * LIST (\HasChildren) "/" INBOX b OK List completed (0.016 + 0.000 + 0.015 secs). *c lsub "" ** c NO [NOPERM] No permission to read subscriptions (0.001 + 0.000 secs). If I understand correctly, lsub should see what is visible by the Email client ? How can I let all the folders visible ? [root@mbox dovecot]# cat dovecot-new.conf # 2.3.8 (9df20d2db): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.8 (b7b03ba2) # OS: Linux 4.18.0-305.3.1.el8.x86_64 x86_64 CentOS Linux release 8.4.2105 nfs4 # Hostname: mbox1.aztgrp.net auth_debug_passwords = yes auth_username_format = %n disable_plaintext_auth = no login_trusted_networks = 177.18.0.0/16 127.0.0.1 ::1 mail_access_groups = mail mail_fsync = always mail_location = mbox:/var/spool2/mail/%u:INBOX=/var/spool/mail/%u:INDEX=/var/indexes/%u:CONTROL=/var/spool/mail-control mail_plugins = " quota" mail_privileged_group = mail managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date ihave mbox_very_dirty_syncs = yes mbox_write_locks = fcntl namespace inbox { inbox = yes location = mailbox Drafts { auto = subscribe special_use = \Drafts } mailbox Junk { auto = subscribe special_use = \Junk } mailbox Sent { auto = subscribe special_use = \Sent } mailbox "Sent Messages" { auto = subscribe special_use = \Sent } mailbox Trash { auto = no special_use = \Trash } mailbox virtual/All { auto = no special_use = \All } prefix = } passdb { driver = pam } plugin { quota_grace = 10%% quota_max_mail_size = 100M quota_rule = *:storage=10000M quota_rule2 = Trash:Storage=+100M quota_status_nouser = DUNNO quota_status_overquota = 552 5.2.2 Mailbox is full quota_status_success = DUNNO quota_warning = storage=95%% quota-warning 95 %u quota_warning2 = storage=80%% quota-warning 80 %u sieve = file:~/sieve;active=~/.dovecot.sieve } pop3_uidl_format = %v-%u service auth { unix_listener auth-master { mode = 0666 } } service dict { unix_listener dict { mode = 0600 user = mail } } service imap-login { inet_listener imap { address = * port = 143 } inet_listener imaps { address = * port = 993 ssl = yes } } service lmtp { inet_listener lmtp { address = ::1, 127.0.0.1 port = 24 } } service pop3-login { inet_listener pop3 { address = * port = 110 } inet_listener pop3s { address = * port = 995 ssl = yes } } service quota-warning { executable = script /usr/local/bin/quota-warning.sh unix_listener quota-warning { user = mail } user = dovecot } ssl = required ssl_ca = </etc/mail/ssl/ssl1/STAR_xxxxp_net.ca-bundle ssl_cert = </etc/mail/ssl/ssl1/STAR_xxxp_net.crt ssl_key = # hidden, use -P to show it userdb { driver = passwd } verbose_proctitle = yes protocol lmtp { mail_plugins = autocreate quota acl fts fts_solr zlib mail_log notify sieve } protocol lda { mail_plugins = " quota sieve quota" } protocol imap { mail_max_userip_connections = 80 mail_plugins = " quota quota imap_quota" ssl_cert = </etc/mail/ssl/ssl1/STAR_xxxp_net.crt ssl_key = # hidden, use -P to show it } protocol pop3 { mail_max_userip_connections = 10 mail_plugins = " quota" } protocol submission { mail_max_userip_connections = 10 mail_plugins = " quota" } My dovecot config Thanks and regards,

1 0

Bypass Trash Folder Sometimes.
by dovecot＠ptld.com 04 Jul '21

04 Jul '21

Is there a way, or a config setting, that would allow you to for-reals delete an email from the inbox instead of sending it to the Trash folder? Not always, the default behavior should still send deleted emails to the trash folder, but on a per case bases be able to just delete an email without it going to the trash folder. Same like how the windows desktop works. If you Delete a file on your desktop it goes to the recycle bin. However if you do Shift + Delete the file gets deleted without going to the recycle bin.

3 3

How to use xapian with non-text attachments
by André Rodier 03 Jul '21

03 Jul '21

Hello, I am developing a hosting platform on Debian Bullseye, with Dovecot amongst other tools. I am trying to use the xapian full test search plugin, but I can see the attachments are skipped: This is what I have in the logs when running the indexing in verbose mode: ----------------------------------------------------------------------- doveadm(camille): Info: FTS Xapian: fts_backend_xapian_check_access doveadm(camille): Info: FTS Xapian: Memory stats : Used = 56 MB, Free = 66 MB doveadm(camille): Info: FTS Xapian: fts_backend_xapian_index_hdr doveadm(camille): Info: FTS Xapian: fts_backend_xapian_query doveadm(camille): Info: FTS Xapian: Query= uid:"44" doveadm(camille): Info: FTS Xapian: Ngram(S) -> 63 items (total 0 KB) doveadm(camille): Info: FTS Xapian: fts_backend_xapian_update_unset_build_key doveadm(camille): Info: FTS Xapian: fts_backend_xapian_update_set_build_key doveadm(camille): Info: FTS Xapian: New part (Header=Message- Id,Type=(null),Disposition=(null)) doveadm(camille): Info: FTS Xapian: fts_backend_xapian_update_build_more doveadm(camille): Info: FTS Xapian: fts_backend_xapian_check_access doveadm(camille): Info: FTS Xapian: Memory stats : Used = 56 MB, Free = 66 MB doveadm(camille): Info: FTS Xapian: fts_backend_xapian_index_hdr doveadm(camille): Info: FTS Xapian: fts_backend_xapian_query doveadm(camille): Info: FTS Xapian: Query= uid:"44" doveadm(camille): Info: FTS Xapian: Ngram(XMID) -> 4 items (total 0 KB) doveadm(camille): Info: FTS Xapian: fts_backend_xapian_update_unset_build_key doveadm(camille): Info: FTS Xapian: fts_backend_xapian_update_set_build_key doveadm(camille): Info: FTS Xapian: New part (Header=X- Mailer,Type=(null),Disposition=(null)) doveadm(camille): Info: FTS Xapian: Unknown header (indexing) 'xmailer' doveadm(camille): Info: FTS Xapian: fts_backend_xapian_update_set_build_key doveadm(camille): Info: FTS Xapian: New part (Header=MIME- Version,Type=(null),Disposition=(null)) doveadm(camille): Info: FTS Xapian: Unknown header (indexing) 'mimeversion' doveadm(camille): Info: FTS Xapian: fts_backend_xapian_update_set_build_key doveadm(camille): Info: FTS Xapian: New part (Header=Content- Type,Type=(null),Disposition=(null)) doveadm(camille): Info: FTS Xapian: Unknown header (indexing) 'contenttype' doveadm(camille): Info: FTS Xapian: fts_backend_xapian_update_set_build_key doveadm(camille): Info: FTS Xapian: New part (Header=Authentication- Results,Type=(null),Disposition=(null)) doveadm(camille): Info: FTS Xapian: Unknown header (indexing) 'authenticationresults' doveadm(camille): Info: FTS Xapian: fts_backend_xapian_update_set_build_key doveadm(camille): Info: FTS Xapian: New part (Header=X-AV- Checked,Type=(null),Disposition=(null)) doveadm(camille): Info: FTS Xapian: Unknown header (indexing) 'xavchecked' doveadm(camille): Info: FTS Xapian: fts_backend_xapian_update_set_build_key doveadm(camille): Info: FTS Xapian: New part (Header=Content- Type,Type=(null),Disposition=(null)) doveadm(camille): Info: FTS Xapian: Unknown header (indexing) 'contenttype' doveadm(camille): Info: FTS Xapian: fts_backend_xapian_update_set_build_key doveadm(camille): Info: FTS Xapian: New part (Header=(null),Type=text/plain,Disposition=(null)) doveadm(camille): Info: FTS Xapian: fts_backend_xapian_update_build_more doveadm(camille): Info: FTS Xapian: fts_backend_xapian_update_unset_build_key doveadm(camille): Info: FTS Xapian: fts_backend_xapian_update_set_build_key doveadm(camille): Info: FTS Xapian: New part (Header=Content- Type,Type=(null),Disposition=(null)) doveadm(camille): Info: FTS Xapian: Unknown header (indexing) 'contenttype' doveadm(camille): Info: FTS Xapian: fts_backend_xapian_update_set_build_key doveadm(camille): Info: FTS Xapian: New part (Header=Content- Description,Type=(null),Disposition=(null)) doveadm(camille): Info: FTS Xapian: Unknown header (indexing) 'contentdescription' doveadm(camille): Info: FTS Xapian: fts_backend_xapian_update_set_build_key doveadm(camille): Info: FTS Xapian: New part (Header=Content- Disposition,Type=(null),Disposition=(null)) doveadm(camille): Info: FTS Xapian: Unknown header (indexing) 'contentdisposition' doveadm(camille): Info: FTS Xapian: fts_backend_xapian_update_set_build_key doveadm(camille): Info: FTS Xapian: New part (Header=Content-Transfer- Encoding,Type=(null),Disposition=(null)) doveadm(camille): Info: FTS Xapian: Unknown header (indexing) 'contenttransferencoding' doveadm(camille): Info: FTS Xapian: fts_backend_xapian_update_set_build_key doveadm(camille): Info: FTS Xapian: New part (Header=(null),Type=text/csv,Disposition=attachment; filename="file.csv") doveadm(camille): Info: FTS Xapian: Skipping part of type 'text/csv' and disposition 'attachment; filename="file.csv"' doveadm(camille): Info: FTS Xapian: fts_backend_xapian_update_set_mailbox doveadm(camille): Info: FTS Xapian: Unset box 'INBOX' (c0d4e304584e5460dae30000075d7e67) doveadm(camille): Info: FTS Xapian: fts_backend_xapian_oldbox doveadm(camille): Info: FTS Xapian: Done indexing 'INBOX' (c0d4e304584e5460dae30000075d7e67) (13 msgs in 261 ms, rate: 49.8) doveadm(camille): Info: FTS Xapian: fts_backend_xapian_release (unset_box) doveadm(camille): Info: FTS Xapian: Committed 'unset_box' in 17 ms doveadm(camille): Info: FTS Xapian: Box is empty doveadm(camille): Info: FTS Xapian: fts_backend_xapian_update_deinit (/home/users/camille/mails/indexes/xapian-indexes) doveadm(camille): Info: FTS Xapian: fts_backend_xapian_release (update_deinit) doveadm(camille): Info: FTS Xapian: Committed 'update_deinit' in 0 ms doveadm(camille): Info: FTS Xapian: Deinit /home/users/camille/mails/indexes/xapian-indexes) ----------------------------------------------------------------------- Especially thos line: doveadm(camille): Info: FTS Xapian: Skipping part of type 'text/csv' and disposition 'attachment; filename="file.csv"' I have seen this as a bug on fts-xapian: https://github.com/grosjo/fts-xapian/issues/68 Which then references a PR on Dovecot core itself: https://github.com/dovecot/core/pull/155 Any idea on how to use xapian with non-text attachments ? Thanks a lot for your help! André

2 2

sieve match with contain asterisk
by Hardy Flor 03 Jul '21

03 Jul '21

Hello, I want to find a keyword in the subject between two "*". How do I have to mask the "*" correctly? I tried: if header :matches "subject" "\*xyz\**" if header :matches "subject" "\\*xyz\\**" Hardy

2 3

lost mailbox
by Stephane Magnier 02 Jul '21

02 Jul '21

Hi, I used dovect with the following setup : mbox:/var/spool2/mail/%u:INBOX=/var/spool/mail/%u If I have a look via cmd line [root@mbxx1 ~]# telnet localhost 143 Trying ::1... telnet: connect to address ::1: Connection refused Trying 127.0.0.1... Connected to localhost. Escape character is '^]'. * OK [CAPABILITY IMAP4rev1 SASL-IR LOGIN-REFERRALS ID ENABLE IDLE LITERAL+ STARTTLS AUTH=PLAIN] Dovecot ready. a login azt000 lassiemag76 a OK [CAPABILITY IMAP4rev1 SASL-IR LOGIN-REFERRALS ID ENABLE IDLE SORT SORT=DISPLAY THREAD=REFERENCES THREAD=REFS THREAD=ORDEREDSUBJECT MULTIAPPEND URL-PARTIAL CATENATE UNSELECT CHILDREN NAMESPACE UIDPLUS LIST-EXTENDED I18NLEVEL=1 CONDSTORE QRESYNC ESEARCH ESORT SEARCHRES WITHIN CONTEXT=SEARCH LIST-STATUS BINARY MOVE SNIPPET=FUZZY PREVIEW=FUZZY LITERAL+ NOTIFY SPECIAL-USE QUOTA] Logged in b list "" ** * LIST (\NoInferiors) "/" 2015 * LIST (\NoInferiors) "/" 2020-IT * LIST (\NoInferiors) "/" 2018-PERSO * LIST (\NoInferiors) "/" 2017 * LIST (\NoInferiors) "/" 2020-MARKETING * LIST (\NoInferiors) "/" 2019-AZT * LIST (\NoInferiors) "/" 2019-ADMIN * LIST (\NoInferiors) "/" "2020- PERSO" * LIST (\NoInferiors) "/" sss * LIST (\NoInferiors) "/" 2019-COMPTA * LIST (\NoInferiors) "/" 2019-PERSO * LIST (\NoInferiors) "/" 2017-ADMIN * LIST (\NoInferiors) "/" 2016 * LIST (\NoInferiors \UnMarked) "/" 2020-compta * LIST (\NoInferiors \UnMarked \Trash) "/" Trash * LIST (\NoInferiors \UnMarked) "/" Archives * LIST (\NoInferiors \Sent) "/" Sent * LIST (\NoInferiors \Marked \Junk) "/" Junk * LIST (\NoInferiors \UnMarked \Drafts) "/" Drafts * LIST (\NoInferiors \UnMarked \Sent) "/" "Sent Messages" * LIST (\NoInferiors) "/" INBOX/2021-AZT * LIST (\NoInferiors) "/" INBOX/2021-WebMEETING * LIST (\NoInferiors) "/" INBOX/2021-zezez * LIST (\NoInferiors) "/" INBOX/2021-PERSO * LIST (\NoInferiors) "/" INBOX/2021-MARKETING * LIST (\NoInferiors \UnMarked) "/" INBOX/2021-COMPTA * LIST (\NoInferiors \UnMarked) "/" INBOX/2021-ADMIN * LIST (\NoInferiors \UnMarked) "/" INBOX/2021-ATV * LIST (\NoInferiors \UnMarked) "/" INBOX/2021-test * LIST (\HasChildren) "/" INBOX b OK List completed (0.009 + 0.000 + 0.008 secs). If I've opened my thunderbird.. I have just the INBOX and nothing else ???????????????????????? and the folder : 2021-ADMIN and 2021-ATV and that's it I've tried to do : /doveadm force-resync -u user1 : /nothing happened Any idea in order to syncrhonized a folder with .... thunderbird ?

2 1

How can I prevent sieve filter from being applied to some mail users?
by yuryb 02 Jul '21

02 Jul '21

We have an emarket(a)example.com mailbox that receives orders from customers. Postfix redirects such emails to the email addresses of our sales managers, as well as to the special address parser(a)example.com, which is used by some analytical software. For this, a file named "Virtual" has been created in the Postfix folder with the following contents:emarket@example.com manager1@example.com,manager2@example.com,manager3@example.com,parser@example.comIn addition, Dovecot places all such emails in the Orders folder of each sales manager. For this, a Sieve filter rule has been created: require ["fileinto", "envelope"]; if envelope: is "to" "emarket(a)example.com" { fileinto "Orders"; stop; } But the problem is that the analytics software that uses the parser(a)example.com mailbox is subscribed only to the default Inbox folder. And it doesn't know how to work with the Orders folder. So I need to somehow prevent the filter from being applied to the parser(a)example.com mailbox. How can I do this using Dovecot or Sieve?

1 0

Bug: empty prefix value in userdb lookup defaults to "yes"?
by Dan Malm 02 Jul '21

02 Jul '21

Hi, I'm trying to migrate some users into our system from another one that also run dovecot but with different prefix and separator settings than we do. I've setup userdb to return these values for a test user to match the other systems separator/prefix setup: { "home": "/customers/b/5/3/cdeadbeef/mail/m0123456789abcdef/", "namespace/inbox/separator": "/", "uid": 10000001, "namespace/inbox/prefix": "", "gid": 10000001 } But the empty value for prefix seems to get converted to some default value of "yes" as when I log in with that user dovecot throws this error: Error: namespace configuration error: list=yes requires prefix=yes to end with separator / Dovecot version: 2.3.13 OS: Ubuntu 20.04.2 -- BR/Mvh. Dan Malm, Systems Engineer, One.com

2 3

SSHA512 Salting in SQL Query
by dovecot＠ptld.com 02 Jul '21

02 Jul '21

I don't understand what im doing wrong. Password = test Salt = salt MariaDB> select to_base64(concat(sha2('testsalt', 512), 'salt')); NmM4MzhlOTM0ZTNmZWVmYWU2Y2ZhNTNhZjExMzc1ZDQ5NTRmODVjNmY1ZWQ4ODhjMDJjZDc4MDZhNzE2OTZkMWNiNDQ5ZjJiZTc4ZTllNmVhMzAxYTk1YzgxZjI4YWQ4NzY2ZjNhZTU4MmY5YmVhYWMzM2M3ZGMyYjdiYTkxODdzYWx0 [root@host /]# doveadm pw -p test -t {SSHA512.b64}NmM4MzhlOTM0ZTNmZWVmYWU2Y2ZhNTNhZjExMzc1ZDQ5NTRmODVjNmY1ZWQ4ODhjMDJjZDc4MDZhNzE2OTZkMWNiNDQ5ZjJiZTc4ZTllNmVhMzAxYTk1YzgxZjI4YWQ4NzY2ZjNhZTU4MmY5YmVhYWMzM2M3ZGMyYjdiYTkxODdzYWx0 Fatal: reverse password verification check failed: Password mismatch Can someone point me in the right direction? Thanks.

2 1

Pigeonhole bug: corrupted redirected emails
by Peter Williams 01 Jul '21

01 Jul '21

Hello, (Please CC me on any replies since I'm not subscribed to this mailing list.) I'm writing to report a bug that I just ran into, involving Sieve/Pigeonhole message redirections. I recently added a rule involving redirections and the redirected messages were getting corrupted. I traced the issue down to the fact that an Mbox-style "From " header line was getting intermixed with the message headers -- note the entry between the two "Received:" headers in this example, which shows the text being delivered to the MTA on stdin: X-Sieve: Pigeonhole Sieve 0.4.24 (124e06aa) X-Sieve-Redirected-From: peter Delivered-To: peter Received: from dovecot by newton.cx with LMTP id xxx for <peter>; Thu, 01 Jul 2021 04:32:50 +0000 From peter(a)newton.cx Thu Jul 01 04:32:50 2021 Received: from xxx by newton.cx with esmtpsa xxx (Exim 4.94.2) (envelope-from <peter(a)newton.cx>) id xxxx for peter(a)newton.cx; Thu, 01 Jul 2021 04:32:50 +0000 Message-ID: <xxx> Subject: qqtestqq This was happening with trivial test messages, and trivial Sieve rules, but I can provide specifics if they would be helpful. Versions: CentOS 7.9.2009; Dovecot 2.2.36; Pigeonhole 0.4.24; Exim 4.92.2. Below I've added the output of `dovecot -n`. My `sendmail_path` setting was empty before, but as a workaround I've set it to a wrapper script that strips out everything before the `From `, "solving" the problem. Thanks so much for building Dovecot, I've been using it with great success for more than a decade! Best, Peter ========================================================= # 2.2.36 (1f10bfa63): /etc/dovecot/dovecot.conf # Pigeonhole version 0.4.24 (124e06aa) # OS: Linux 4.14.210-rh241-20201203010913.xenU.x86_64 x86_64 CentOS Linux release 7.9.2009 (Core) ext3 # Hostname: newton.cx auth_username_format = %Ln mail_location = mdbox:/var/spool/mail/%n mail_plugins = zlib managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto reject envelope encoded- character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date index ihave duplicate mime foreverypart extracttext mbox_write_locks = fcntl namespace inbox { hidden = no inbox = yes location = mailbox Drafts { special_use = \Drafts } mailbox Junk { special_use = \Junk } mailbox Sent { special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Trash { special_use = \Trash } prefix = separator = . type = private } passdb { driver = pam } plugin { recipient_delimiter = + sieve = ~/.dovecot.sieve sieve_before = /etc/dovecot/dspam.sieve sieve_dir = /var/lib/sieve-users/%u sieve_global_dir = /etc/dovecot/sieve-global zlib_save = gz zlib_save_level = 7 } protocols = imap pop3 lmtp sieve sendmail_path = /usr/sbin/dovecot-sieve-sendmail.sh service imap-login { inet_listener imap { port = 143 } inet_listener imaps { port = 993 ssl = yes } } service managesieve-login { inet_listener sieve { address = 127.0.0.1 port = 4190 } } service pop3-login { inet_listener pop3 { port = 0 } inet_listener pop3s { port = 995 ssl = yes } } ssl_cert = </etc/letsencrypt/live/newton.cx/fullchain.pem ssl_key = # hidden, use -P to show it userdb { driver = passwd } protocol lmtp { mail_plugins = zlib sieve } protocol lda { mail_plugins = zlib sieve } protocol imap { mail_max_userip_connections = 20 } protocol pop3 { pop3_uidl_format = %08Xu%08Xv }

1 0

Dovecot LMTP Process Hung
by Miguel Ângelo Santos Pereira 01 Jul '21

01 Jul '21

Hey there guys, Here's what I found in the logs: Jul 1 08:10:27 tango dovecot: imap-login: Warning: Event 0x564fff5fcb20 leaked (parent=(nil)): client-common.c:217 Jul 1 08:10:27 tango dovecot: master: Warning: Sent SIGTERM to 1 auth processes Jul 1 08:10:27 tango dovecot: master: Warning: Processes aren't dying after reload, sent SIGTERM to 12 processes. Jul 1 08:10:27 tango dovecot: pop3-login: Warning: Event 0x5567deff4a00 leaked (parent=(nil)): client-common.c:217 Jul 1 08:10:27 tango dovecot: pop3-login: Warning: Event 0x5562c9058d40 leaked (parent=(nil)): client-common.c:217 Jul 1 08:10:27 tango dovecot: imap-login: Warning: Event 0x5571f845a200 leaked (parent=(nil)): client-common.c:217 Jul 1 08:10:27 tango dovecot: imap-login: Warning: Event 0x5571f84593d0 leaked (parent=(nil)): client-common.c:217 Jul 1 08:10:27 tango dovecot: imap-login: Warning: Event 0x5571f841bf60 leaked (parent=(nil)): client-common.c:217 Jul 1 08:10:27 tango dovecot: imap-login: Warning: Event 0x5571f83f48d0 leaked (parent=(nil)): client-common.c:217 Jul 1 08:10:27 tango dovecot: imap-login: Warning: Event 0x5571f83f4060 leaked (parent=(nil)): client-common.c:217 Jul 1 08:10:27 tango dovecot: imap-login: Warning: Event 0x564fff5fcb20 leaked (parent=(nil)): client-common.c:217 Jul 1 08:10:27 tango dovecot: imap-login: Warning: Event 0x564fff5e0c50 leaked (parent=(nil)): client-common.c:217 Jul 1 08:10:27 tango dovecot: imap-login: Warning: Event 0x564fff5c1c00 leaked (parent=(nil)): client-common.c:217 Jul 1 08:10:27 tango dovecot: imap-login: Warning: Event 0x564fff59f330 leaked (parent=(nil)): client-common.c:217 Jul 1 08:10:27 tango dovecot: imap-login: Warning: Event 0x564fff4db1f0 leaked (parent=(nil)): client-common.c:217 Jul 1 08:09:59 tango dovecot: master: Warning: Sent SIGTERM to 1 stats processes Jul 1 08:09:59 tango dovecot: master: Warning: Sent SIGTERM to 1 pop3-login processes Jul 1 08:09:59 tango dovecot: master: Warning: Sent SIGTERM to 5 imap processes Jul 1 08:09:59 tango dovecot: master: Warning: Sent SIGTERM to 1 imap-login processes Jul 1 08:09:59 tango dovecot: master: Warning: Sent SIGTERM to 1 config processes Jul 1 08:09:59 tango dovecot: master: Warning: Sent SIGTERM to 1 auth processes Jul 1 08:09:59 tango dovecot: master: Warning: Processes aren't dying after reload, sent SIGTERM to 10 processes. Jul 1 08:09:59 tango dovecot: stats: Warning: Killed with signal 15 (by pid=28266 uid=0 code=kill) Jul 1 08:09:59 tango dovecot: imap: Warning: Killed with signal 15 (by pid=28266 uid=0 code=kill) Jul 1 08:09:59 tango dovecot: imap: Warning: Killed with signal 15 (by pid=28266 uid=0 code=kill) Jul 1 08:09:59 tango dovecot: imap: Warning: Killed with signal 15 (by pid=28266 uid=0 code=kill) Jul 1 08:09:59 tango dovecot: imap: Warning: Killed with signal 15 (by pid=28266 uid=0 code=kill) -- We noticed this as the server wouldn't stop overloading, reaching 150+ load, we had to reboot it. It's not the first time we see this, and kill -9 PID wouldn't do anything to the processes, at all. Any idea guys? We're stuck here. I've tried to increase the RAM allocation for dovecot, hope it helps. -- *Com os meus melhores cumprimentos,* *Best Regards,* *Miguel Ângelo Santos Pereira*

1 1

Dovecot sync broke after upgrade to OpenBSD 6.9
by William Orr 01 Jul '21

01 Jul '21

Hey, I have two mailservers running OpenBSD 6.9, and I use bidirectional syncing of my maildirs through doveadm. After the upgrade, I noticed that the sync process was failing. OpenBSD 6.8 shipped with Dovecot 2.3.13, 6.9 ships with 2.3.14. Here's the output of the dovecot --build-options: kefka|~|03:01:50|89$ dovecot --build-options Build options: ioloop=kqueue notify=kqueue openssl io_block_size=8192 SQL driver plugins: mysql postgresql sqlite Passdb: bsdauth checkpassword ldap passwd passwd-file sql Userdb: checkpassword ldap(plugin) passwd prefetch passwd-file sql I did not compile this manually, this is from packages. More info about configure options passed are available here, in the Makefile from ports https://cvsweb.openbsd.org/cgi-bin/cvsweb/ports/mail/dovecot/Makefile?rev=1… Here's a sample run of the sync: kefka|~|02:57:05|0$ doas doveadm sync -u worr(a)worrbase.com remote:sabin.worrbase.com doveadm(VERSION dsync 3 5): Error: User doesn't exist dsync-local(worr)<FNQIMvI9omB4VwEADTvxNg>: Error: read(sabin.worrbase.com) failed: EOF (version not received) dsync-local(worr)<FNQIMvI9omB4VwEADTvxNg>: Error: Remote command returned error 67: /usr/bin/ssh -i /root/.ssh/id_ed25519.dsync sabin.worrbase.com /usr/local/bin/dsync-in-wrapper.sh kefka|~|02:57:08|75$ cat /usr/local/bin/dsync-in-wrapper.sh #!/bin/ksh read username /usr/local/bin/doveadm dsync-server -u "$username" I ktraced the process, and noticed that in the communication with the remote mail server, that a bunch of doveadm plugins fail to load. It's worth noting that these are plugins that are dlopen(3)ed in response to certain commands sent over the wire, so they don't show up in ldd(1) output. kefka|~|03:00:08|0$ doas kdump | grep symbol "doveadm:/usr/local/lib/dovecot/doveadm/lib10_doveadm_acl_plugin.so: undefined symbol 'acl_user_module' "doveadm:/usr/local/lib/dovecot/doveadm/lib10_doveadm_acl_plugin.so: undefined symbol 'acl_mailbox_get_aclobj' "doveadm:/usr/local/lib/dovecot/doveadm/lib10_doveadm_acl_plugin.so: undefined symbol 'acl_mailbox_list_get_backend' "doveadm:/usr/local/lib/dovecot/doveadm/lib10_doveadm_acl_plugin.so: undefined symbol 'acl_object_list_init' "doveadm:/usr/local/lib/dovecot/doveadm/lib10_doveadm_acl_plugin.so: undefined symbol 'acl_object_list_next' "doveadm:/usr/local/lib/dovecot/doveadm/lib10_doveadm_acl_plugin.so: undefined symbol 'acl_backend_rights_match_me' "doveadm:/usr/local/lib/dovecot/doveadm/lib10_doveadm_acl_plugin.so: undefined symbol 'acl_rights_get_id' "doveadm:/usr/local/lib/dovecot/doveadm/lib10_doveadm_acl_plugin.so: undefined symbol 'acl_object_list_deinit' "doveadm:/usr/local/lib/dovecot/doveadm/lib10_doveadm_acl_plugin.so: undefined symbol 'acl_object_get_my_rights' "doveadm:/usr/local/lib/dovecot/doveadm/lib10_doveadm_acl_plugin.so: undefined symbol 'acl_rights_update_import' "doveadm:/usr/local/lib/dovecot/doveadm/lib10_doveadm_acl_plugin.so: undefined symbol 'acl_mailbox_update_acl' "doveadm:/usr/local/lib/dovecot/doveadm/lib10_doveadm_acl_plugin.so: undefined symbol 'acl_lookup_dict_rebuild' "doveadm:/usr/local/lib/dovecot/doveadm/lib10_doveadm_acl_plugin.so: undefined symbol 'acl_backend_nonowner_lookups_iter_init' "doveadm:/usr/local/lib/dovecot/doveadm/lib10_doveadm_acl_plugin.so: undefined symbol 'acl_backend_nonowner_lookups_iter_next' "doveadm:/usr/local/lib/dovecot/doveadm/lib10_doveadm_acl_plugin.so: undefined symbol 'acl_backend_nonowner_lookups_iter_deinit' "doveadm:/usr/local/lib/dovecot/doveadm/lib10_doveadm_acl_plugin.so: undefined symbol 'acl_backend_nonowner_lookups_rebuild' "doveadm:/usr/local/lib/dovecot/doveadm/lib10_doveadm_acl_plugin.so: undefined symbol 'acl_lookup_dict_is_enabled' "doveadm:/usr/local/lib/dovecot/doveadm/lib10_doveadm_acl_plugin.so: undefined symbol 'acl_lookup_dict_iterate_visible_init' "doveadm:/usr/local/lib/dovecot/doveadm/lib10_doveadm_acl_plugin.so: undefined symbol 'acl_lookup_dict_iterate_visible_next' "doveadm:/usr/local/lib/dovecot/doveadm/lib10_doveadm_acl_plugin.so: undefined symbol 'acl_lookup_dict_iterate_visible_deinit' "doveadm:/usr/local/lib/dovecot/doveadm/lib10_doveadm_quota_plugin.so: undefined symbol 'quota_user_module' "doveadm:/usr/local/lib/dovecot/doveadm/lib10_doveadm_quota_plugin.so: undefined symbol 'quota_root_get_resources' "doveadm:/usr/local/lib/dovecot/doveadm/lib10_doveadm_quota_plugin.so: undefined symbol 'quota_get_resource' "doveadm:/usr/local/lib/dovecot/doveadm/lib20_doveadm_fts_plugin.so: undefined symbol 'fts_list_backend' "doveadm:/usr/local/lib/dovecot/doveadm/lib20_doveadm_fts_plugin.so: undefined symbol 'fts_backend_lookup' "doveadm:/usr/local/lib/dovecot/doveadm/lib20_doveadm_fts_plugin.so: undefined symbol 'fts_backend_lookup_done' "doveadm:/usr/local/lib/dovecot/doveadm/lib20_doveadm_fts_plugin.so: undefined symbol 'fts_search_args_expand' "doveadm:/usr/local/lib/dovecot/doveadm/lib20_doveadm_fts_plugin.so: undefined symbol 'fts_language_find' "doveadm:/usr/local/lib/dovecot/doveadm/lib20_doveadm_fts_plugin.so: undefined symbol 'fts_user_get_language_list' "doveadm:/usr/local/lib/dovecot/doveadm/lib20_doveadm_fts_plugin.so: undefined symbol 'fts_language_detect' "doveadm:/usr/local/lib/dovecot/doveadm/lib20_doveadm_fts_plugin.so: undefined symbol 'fts_language_list_get_first' "doveadm:/usr/local/lib/dovecot/doveadm/lib20_doveadm_fts_plugin.so: undefined symbol 'fts_user_language_find' "doveadm:/usr/local/lib/dovecot/doveadm/lib20_doveadm_fts_plugin.so: undefined symbol 'fts_tokenizer_reset' "doveadm:/usr/local/lib/dovecot/doveadm/lib20_doveadm_fts_plugin.so: undefined symbol 'fts_tokenizer_final' "doveadm:/usr/local/lib/dovecot/doveadm/lib20_doveadm_fts_plugin.so: undefined symbol 'fts_tokenizer_next' "doveadm:/usr/local/lib/dovecot/doveadm/lib20_doveadm_fts_plugin.so: undefined symbol 'fts_filter_filter' "doveadm:/usr/local/lib/dovecot/doveadm/lib20_doveadm_fts_plugin.so: undefined symbol 'fts_backend_optimize' "doveadm:/usr/local/lib/dovecot/doveadm/lib20_doveadm_fts_plugin.so: undefined symbol 'fts_backend_rescan' "doveadm:/usr/local/lib/dovecot/doveadm/libdoveadm_mail_crypt_plugin.so: undefined symbol 'mail_crypt_user_get_public_key' "doveadm:/usr/local/lib/dovecot/doveadm/libdoveadm_mail_crypt_plugin.so: undefined symbol 'mail_crypt_user_generate_keypair' "doveadm:/usr/local/lib/dovecot/doveadm/libdoveadm_mail_crypt_plugin.so: undefined symbol 'mail_crypt_box_get_public_key' "doveadm:/usr/local/lib/dovecot/doveadm/libdoveadm_mail_crypt_plugin.so: undefined symbol 'mail_crypt_box_generate_keypair' "doveadm:/usr/local/lib/dovecot/doveadm/libdoveadm_mail_crypt_plugin.so: undefined symbol 'mail_crypt_box_get_pvt_digests' "doveadm:/usr/local/lib/dovecot/doveadm/libdoveadm_mail_crypt_plugin.so: undefined symbol 'mail_crypt_acl_secure_sharing_enabled'" "doveadm:/usr/local/lib/dovecot/doveadm/libdoveadm_mail_crypt_plugin.so: undefined symbol 'mail_crypt_box_share_private_keys' "doveadm:/usr/local/lib/dovecot/doveadm/libdoveadm_mail_crypt_plugin.so: undefined symbol 'mail_crypt_box_set_shared_key' "doveadm:/usr/local/lib/dovecot/doveadm/libdoveadm_mail_crypt_plugin.so: undefined symbol 'mail_crypt_get_private_key' I checked on both machines, and these symbols are all undefined in the associated libraries. I do notice though, that these symbols seem to be present in similar dovecot, non-doveadm plugins: kefka|~|03:04:56|130$ nm -A /usr/local/lib/dovecot/doveadm/lib10_doveadm_acl_plugin.so | grep acl_user_module /usr/local/lib/dovecot/doveadm/lib10_doveadm_acl_plugin.so: U acl_user_module kefka|~|03:05:14|0$ nm -A /usr/local/lib/dovecot/lib01_acl_plugin.so | grep acl_user_module /usr/local/lib/dovecot/lib01_acl_plugin.so:0001b008 D acl_user_module However, the doveadm plugins don't link against them? kefka|~|03:04:24|1$ ldd /usr/local/lib/dovecot/doveadm/lib10_doveadm_acl_plugin.so /usr/local/lib/dovecot/doveadm/lib10_doveadm_acl_plugin.so: Start End Type Open Ref GrpRef Name 000001d89e043000 000001d89e04d000 dlib 1 0 0 /usr/local/lib/dovecot/doveadm/lib10_doveadm_acl_plugin.so Is anyone else seeing issues like this? Is there perhaps a misconfiguration on my end? Here's the full output of dovecot -n # 2.3.14 (cee3cbc0d): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.14 (1b5c82b2) # OS: OpenBSD 6.9 amd64 # Hostname: kefka.worrbase.com auth_username_format = %n default_vsz_limit = 512 M doveadm_password = # hidden, use -P to show it dsync_remote_cmd = /usr/bin/ssh -i /root/.ssh/id_ed25519.dsync %{host} /usr/local/bin/dsync-in-wrapper.sh first_valid_uid = 1000 imap_client_workarounds = delay-newmail tb-extra-mailbox-sep tb-lsub-flags mail_location = maildir:~/Maildir mail_plugins = " notify replication" managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date index ihave duplicate mime foreverypart extracttext mbox_write_locks = fcntl mmap_disable = yes namespace inbox { inbox = yes location = mailbox Drafts { special_use = \Drafts } mailbox Sent { special_use = \Sent } mailbox Spam { special_use = \Junk } mailbox Trash { special_use = \Trash } prefix = separator = / } passdb { driver = bsdauth } plugin { mail_replica = remoteprefix:root@sabin.worrbase.com sieve = ~/.dovecot.sieve sieve_dir = ~/.sieve sieve_user_log = ~/.dovecot.sieve.log } pop3_client_workarounds = outlook-no-nuls oe-ns-eoh postmaster_address = postmaster(a)worrbase.com protocols = imap lmtp service aggregator { fifo_listener replication-notify-fifo { mode = 0666 } unix_listener replication-notify { mode = 0666 } } service imap-login { inet_listener imap { port = 143 } inet_listener imaps { port = 993 ssl = yes } } service lmtp { inet_listener lmtp { address = localhost port = 2525 } } service managesieve-login { inet_listener sieve { port = 4190 } inet_listener sieve_deprecated { port = 2000 } } service pop3-login { inet_listener pop3 { port = 0 } inet_listener pop3s { port = 0 } } service replicator { process_min_avail = 1 unix_listener replicator-doveadm { mode = 0666 } } ssl = required ssl_cert = </etc/mail/certs/mail.worrbase.com.crt ssl_cipher_list = ALL:HIGH:!TLSv1:!SSLv3:!SSLv2:!MEDIUM:!LOW:!EXP:!RC4:!MD5:!aNULL:@STRENGTH ssl_client_ca_file = /etc/ssl/cert.pem ssl_dh = # hidden, use -P to show it ssl_key = # hidden, use -P to show it ssl_min_protocol = TLSv1.1 userdb { driver = passwd } protocol lmtp { mail_plugins = " notify replication sieve" } protocol lda { mail_plugins = " notify replication sieve" } protocol imap { mail_max_userip_connections = 20 mail_plugins = " notify replication" } Let me know if I need to provide more info. Thanks so much for the help!

3 3

Pigeonhole - Auto create default per user script
by dovecot＠ptld.com 01 Jul '21

01 Jul '21

Is there a way to have a per-user default sieve script get auto created if it doesn't exist? Or created on first time use like when the directory set by plugin{sieve=file:~/} gets created? Not global scripts.

2 1

Pigeonhole sieve_user_log
by dovecot＠ptld.com 01 Jul '21

01 Jul '21

https://doc.dovecot.org/configuration_manual/sieve/configuration/ Pigeonhole creates logs separate from main dovecot logs. I see sieve_user_log allows you to change log location and it says if you don't set it logs are still made by default. I can not find anything about log rotation of these pigeonhole logs or if there is a way to disable this logging. Do i need to worry about this log growing out of control? Is there a way to disable it? Does it prune/purge itself? Any practical reason to keep these logs?

2 1

Feature/patch request
by Bucher, Dr. Damian 30 Jun '21

30 Jun '21

Hi, we ran into a problem, while using filesystem snapshots on a GPFS-filesystem. With this we want to give the users the opportunity to restore Mailboxes from this snapshots in case they deleted mail by accident. For each snapshot we create a namespace via a postlogin skript (with INDEX=MEMORY to avoid writing index files to a ro filesystem). The snapshot are of course read only. When accessing the mailboxes in the namespaces, dovecot generates an error (ro filesystem): Error: Mailbox #backup20/Mail/deleted-messages: open() failed with mbox: Read-only file system We tracked that down to a problem in src/lib-storage/index/mbox/mbox-file.c (yes, we are still using mbox ;) ) fd = open(mailbox_get_path(&mbox->box), mbox_is_backend_readonly(mbox) ? O_RDONLY : O_RDWR); if (fd == -1 && errno == EACCES && !mbox->backend_readonly) { mbox->backend_readonly = TRUE; fd = open(mailbox_get_path(&mbox->box), O_RDONLY); } Here the mailbox is opened and it is checked wether the file is ro or rw. Since the snapshot contains the original file permissions, the file is of course rw, but the filesystem is ro. Unfortunately the code only checks for file permissions (errno == EACCES), which doesn’t catch our error condition (FS ro). We think that exchanging this to (errno == EACCESS || errno == EROFS) would catch the file system ro error correctly and set the readonly flag correctly and open the mailbox ro. (this probably hast to be done for other mailbox formats in the corresponding files too) What do you think? Is there a chance to implement that in an upcoming release? Best regards Damian — Postmaster@WWU WWU IT Westfälische Wilhelms-Universität (WWU) Münster Röntgenstr. 7-13, 48149 Münster mailto:postmaster@uni-muenster.de

2 2

oauth2
by Andrea Gabellini 30 Jun '21

30 Jun '21

Hello, Dovecot 2.3.15 installed from repository on CentOS 7.9 I would like to try the oauth2 mechanism to autenticate my users. I have installed a working demo of KeyCloak and I have a working installation of Dovecot 2.3.15 with LDAP backend and plain authentication. My Thunderbird client always says "that the server doesn't manage the authentication method", but with a "openssl s_client -connect" command I get: * OK [CAPABILITY IMAP4rev1 SASL-IR LOGIN-REFERRALS ID ENABLE IDLE LITERAL+ AUTH=PLAIN AUTH=OAUTHBEARER AUTH=XOAUTH2] IMAP ready. Putting Dovecot in debug I can't see any error or warning on oauth2 authentication. I'm following the offical guide: auth_mechanisms = plain oauthbearer xoauth2 passdb { driver = oauth2 mechanisms = xoauth2 oauthbearer args = /etc/dovecot/dovecot-oauth2.conf.ext } /etc/dovecot/dovecot-oauth2.conf.ext: tokeninfo_url = https://www.googleapis.com/oauth2/v3/tokeninfo?access_token= introspection_url = https://www.googleapis.com/oauth2/v2/userinfo #force_introspection = yes username_attribute = email tls_ca_cert_file = /etc/ssl/certs/ca-certificates.crt I'm using an explicit wrong configuration to thrown some errors and verify that Dovecot is really using the OAUTH2 mechanism, but I don't get any errors... What I'm doing wrong? Thanks, Andrea -- __________________________ Okay, okay, I'll take it back ... UNfuck you ! __________________________ TIM San Marino S.p.A. Andrea Gabellini Engineering R&D TIM San Marino S.p.A. - https://www.telecomitalia.sm Via Ventotto Luglio, 212 - Piano -2 47893 - Borgo Maggiore - Republic of San Marino Tel: (+378) 0549 886237 Fax: (+378) 0549 886188 -- Informativa Privacy Questa email ha per destinatari dei contatti presenti negli archivi di TIM San Marino S.p.A.. Tutte le informazioni vengono trattate e tutelate nel rispetto della normativa vigente sulla protezione dei dati personali (Reg. EU 2016/679). Per richiedere informazioni e/o variazioni e/o la cancellazione dei vostri dati presenti nei nostri archivi potete inviare una email a privacy(a)telecomitalia.sm. Avviso di Riservatezza Il contenuto di questa e-mail e degli eventuali allegati e' strettamente confidenziale e destinato alla/e persona/e a cui e' indirizzato. Se avete ricevuto per errore questa e-mail, vi preghiamo di segnalarcelo immediatamente e di cancellarla dal vostro computer. E' fatto divieto di copiare e divulgare il contenuto di questa e-mail. Ogni utilizzo abusivo delle informazioni qui contenute da parte di persone terze o comunque non indicate nella presente e-mail potra' essere perseguito ai sensi di legge.

2 7

Panic indexer-worker on Dovecot 2.3.15
by Alessio Cecchi 30 Jun '21

30 Jun '21

Hi, after the upgrade to dovecot 2.3.15 the Panic: indexer-worker error is still present. I don't know if is related to searching in a Virtual folder (look for my previous email on list with subject "Panic on indexer-worker and Dovecot stop to search on Solr" for more details). Here the relevant configuration of FTS plugin: plugin { fts = solr fts_autoindex = no fts_autoindex_exclude = \Junk fts_autoindex_exclude2 = \Drafts fts_decoder = decode2text fts_enforced = body fts_index_timeout = 5s fts_solr = url=http://10.0.0.32:8983/solr/dovecot/ [...] I'm running Dovecot with FTS Solr 7.7, here the log error and the bt full: Jun 29 13:06:26 Panic: indexer-worker(user1(a)company.net) session=<SLTLmOXFFIy5Ydlu:6BC4HLH+2mBHQwAAxbYlJw>: file http-clien t-request.c: line 1240 (http_client_request_send_more): assertion failed: (req->payload_input != NULL) Jun 29 13:06:26 Error: indexer-worker(user1(a)company.net) session=<SLTLmOXFFIy5Ydlu:6BC4HLH+2mBHQwAAxbYlJw>: Raw backtrace: /usr/lib64/dovecot/libdovecot.so.0(backtrace_append+0x42) [0x7f7212b36862] -> /usr/lib64/dovecot/libdovecot.so.0(backtrace_get+0x1e) [0x7f7212b3696e] -> /usr/lib64/dovecot/libdovecot.so.0(+0xf50fe) [0x7f7212b440fe] -> /usr/lib64/dovecot/libdovecot.so.0(+0xf51a1) [ 0x7f7212b441a1] -> /usr/lib64/dovecot/libdovecot.so.0(i_fatal+0) [0x7f7212a9460c] -> /usr/lib64/dovecot/libdovecot.so.0(http_client_ request_send_more+0x3dd) [0x7f7212add54d] -> /usr/lib64/dovecot/libdovecot.so.0(http_client_connection_output+0xf1) [0x7f7212ae1ca1] -> /usr/lib64/dovecot/libdovecot.so.0(+0x11e870) [0x7f7212b6d870] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_call_io+0x65) [0x7f 7212b5c425] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0x12b) [0x7f7212b5ddab] -> /usr/lib64/dovecot/libdove cot.so.0(io_loop_handler_run+0x59) [0x7f7212b5c529] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_run+0x38) [0x7f7212b5c768] -> /usr /lib64/dovecot/libdovecot.so.0(http_client_wait+0xcd) [0x7f7212aeadbd] -> /usr/lib64/dovecot/lib21_fts_solr_plugin.so(solr_connectio n_select+0xe5) [0x7f7210a79265] -> /usr/lib64/dovecot/lib21_fts_solr_plugin.so(+0x4684) [0x7f7210a75684] -> /usr/lib64/dovecot/lib20 _fts_plugin.so(fts_backend_get_last_uid+0x6e) [0x7f7211e1944e] -> /usr/lib64/dovecot/lib20_fts_plugin.so(+0xf9d2) [0x7f7211e1f9d2] - > /usr/lib64/dovecot/lib20_fts_plugin.so(+0x10f56) [0x7f7211e20f56] -> /usr/lib64/dovecot/lib20_virtual_plugin.so(+0x94da) [0x7f7211 a014da] -> /usr/lib64/dovecot/lib20_fts_plugin.so(+0x10ba6) [0x7f7211e20ba6] -> /usr/lib64/dovecot/libdovecot-storage.so.0(mail_prec ache+0x2e) [0x7f7212e48fae] -> dovecot/indexer-worker [user1(a)company.net Virtual/All](+0x2bb1) [0x55559e522bb1] -> /usr/lib 64/dovecot/libdovecot.so.0(io_loop_call_io+0x65) [0x7f7212b5c425] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_handler_run_internal +0x12b) [0x7f7212b5ddab] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_handler_run+0x59) [0x7f7212b5c529] -> /usr/lib64/dovecot/libd ovecot.so.0(io_loop_run+0x38) [0x7f7212b5c768] -> /usr/lib64/dovecot/libdovecot.so.0(master_service_run+0x13) [0x7f7212ac63c3] -> do vecot/indexer-worker [user1(a)company.net Virtual/All](main+0xd7) [0x55559e522437] -> /lib64/libc.so.6(__libc_start_main+0xf5 ) [0x7f72126a3555] -> dovecot/indexer-worker [user1(a)company.net Virtual/All](+0x24fa) [0x55559e5224fa] Jun 29 13:06:26 Fatal: indexer-worker(user1(a)company.net) session=<SLTLmOXFFIy5Ydlu:6BC4HLH+2mBHQwAAxbYlJw>: master: service(indexer-worker): child 17223 killed with signal 6 (core dumped) # gdb /usr/libexec/dovecot/indexer-worker /var/core/core.indexer-worker.17223 GNU gdb (GDB) Red Hat Enterprise Linux 7.6.1-120.el7 Copyright (C) 2013 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-redhat-linux-gnu". For bug reporting instructions, please see: <http://www.gnu.org/software/gdb/bugs/>... Reading symbols from /usr/libexec/dovecot/indexer-worker...Reading symbols from /usr/lib/debug/usr/libexec/dovecot/indexer-worker.debug...done. done. [New LWP 17223] [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib64/libthread_db.so.1". Core was generated by `dovecot/indexer-worker'. Program terminated with signal 6, Aborted. #0 0x00007f72126b7387 in raise () from /lib64/libc.so.6 Missing separate debuginfos, use: debuginfo-install bzip2-libs-1.0.6-13.el7.x86_64 expat-2.1.0-12.el7.x86_64 glibc-2.17-324.el7_9.x86_64 libgcc-4.8.5-44.el7.x86_64 libzstd-1.5.0-1.el7.x86_64 xz-libs-5.2.2-1.el7.x86_64 zlib-1.2.7-19.el7_9.x86_64 (gdb) bt full #0 0x00007f72126b7387 in raise () from /lib64/libc.so.6 No symbol table info available. #1 0x00007f72126b8a78 in abort () from /lib64/libc.so.6 No symbol table info available. #2 0x00007f7212b440b7 in default_fatal_finish (status=0, type=<optimized out>) at failures.c:459 backtrace = 0x55559eb75970 "/usr/lib64/dovecot/libdovecot.so.0(backtrace_append+0x42) [0x7f7212b36862] -> /usr/lib64/dovecot/libdovecot.so.0(backtrace_get+0x1e) [0x7f7212b3696e] -> /usr/lib64/dovecot/libdovecot.so.0(+0xf50fe) [0"... recursed = 0 #3 fatal_handler_real (ctx=<optimized out>, format=<optimized out>, args=<optimized out>) at failures.c:471 status = 0 #4 0x00007f7212b441a1 in i_internal_fatal_handler (ctx=<optimized out>, format=<optimized out>, args=<optimized out>) at failures.c:866 No locals. #5 0x00007f7212a9460c in i_panic (format=format@entry=0x7f7212b85cf8 "file %s: line %d (%s): assertion failed: (%s)") at failures.c:523 ctx = {type = LOG_TYPE_PANIC, exit_status = 0, timestamp = 0x0, timestamp_usecs = 0, log_prefix = 0x0, log_prefix_type_pos = 0} args = {{gp_offset = 40, fp_offset = 48, overflow_arg_area = 0x7ffe7b6e7150, reg_save_area = 0x7ffe7b6e7090}} #6 0x00007f7212add54d in http_client_request_send_more (req=req@entry=0x55559eca9db8, pipelined=pipelined@entry=false) at http-client-request.c:1240 conn = 0x55559ec8b750 cctx = 0x55559ebb63a8 output = 0x55559ecafa70 res = <optimized out> error = <optimized out> offset = <optimized out> __func__ = "http_client_request_send_more" #7 0x00007f7212ae1ca1 in http_client_connection_continue_request (conn=0x55559ec8b750) at http-client-connection.c:1342 tmp_conn = 0x55559ec8b750 count = 1 ret = <optimized out> reqs = <optimized out> req = 0x55559eca9db8 pipelined = false #8 http_client_connection_output (conn=0x55559ec8b750) at http-client-connection.c:1374 output = <optimized out> ret = <optimized out> #9 0x00007f7212b6d870 in stream_send_io (fstream=0x55559ec8cb20) at ostream-file.c:526 ostream = 0x55559ec8cbc0 am = 0x55559ec8cb20 use_cork = true ret = <optimized out> ---Type <return> to continue, or q <return> to quit--- #10 0x00007f7212b5c425 in io_loop_call_io (io=0x55559ec925f0) at ioloop.c:715 ioloop = 0x55559ecaf4d0 t_id = 6 __func__ = "io_loop_call_io" #11 0x00007f7212b5ddab in io_loop_handler_run_internal (ioloop=ioloop@entry=0x55559ecaf4d0) at ioloop-epoll.c:222 ctx = 0x55559ecab870 events = <optimized out> list = 0x55559ec8c8e0 io = <optimized out> tv = {tv_sec = 0, tv_usec = 0} events_count = <optimized out> msecs = <optimized out> ret = 1 i = 0 call = <optimized out> __func__ = "io_loop_handler_run_internal" #12 0x00007f7212b5c529 in io_loop_handler_run (ioloop=ioloop@entry=0x55559ecaf4d0) at ioloop.c:767 __func__ = "io_loop_handler_run" #13 0x00007f7212b5c768 in io_loop_run (ioloop=0x55559ecaf4d0) at ioloop.c:740 __func__ = "io_loop_run" #14 0x00007f7212aeadbd in http_client_wait () at http-client.c:339 prev_ioloop = 0x55559eb7b050 client_ioloop = 0x55559ecaf4d0 prev_client_ioloop = 0x55559eb7b050 __func__ = "http_client_wait" #15 0x00007f7210a79265 in solr_connection_select (conn=0x55559eb8b150, query=<optimized out>, pool=<optimized out>, box_results_r=0x7ffe7b6e7400) at solr-connection.c:211 lctx = {result_pool = 0x55559ec03910, payload = 0x0, io = 0x0, request_status = 0, parser = 0x0, results = 0x0} http_req = 0x55559ecb3b48 url = <optimized out> #16 0x00007f7210a75684 in fts_backend_solr_get_last_uid (_backend=0x55559eb8b090, box=0x55559ebe59a8, last_uid_r=0x7ffe7b6e74a4) at fts-backend-solr.c:238 hdr = {last_indexed_uid = 0, settings_checksum = 0, unused = 0} #17 0x00007f7211e1944e in fts_backend_get_last_uid (backend=<optimized out>, box=box@entry=0x55559ebe59a8, last_uid_r=last_uid_r@entry=0x7ffe7b6e74a4) at fts-api.c:106 hdr = {last_indexed_uid = 2, settings_checksum = 0, unused = 317606002} #18 0x00007f7211e1f9d2 in fts_mailbox_get_last_cached_seq (box=box@entry=0x55559ebe59a8, seq_r=seq_r@entry=0x7ffe7b6e74f4) at fts-storage.c:85 flist = <optimized out> seq1 = 21845 seq2 = 2663132384 last_uid = 21845 ---Type <return> to continue, or q <return> to quit--- #19 0x00007f7211e20f56 in fts_mail_precache_init (_mail=<optimized out>, _mail=<optimized out>) at fts-storage.c:478 ft = 0x55559ec8c820 flist = 0x55559ebca0a0 last_seq = 21845 #20 fts_mail_index (_mail=0x55559ecaed08) at fts-storage.c:501 ft = 0x55559ec8c820 flist = 0x55559ebca0a0 pmail = 0x55559ecaed08 #21 fts_mail_precache (_mail=0x55559ecaed08) at fts-storage.c:562 _data_stack_cur_id = 5 mail = 0x55559ecaed08 fmail = <optimized out> ft = 0x55559ec8c820 ret = 0 __func__ = "fts_mail_precache" #22 0x00007f7211a014da in virtual_mail_precache (mail=<optimized out>) at virtual-mail.c:243 vmail = <optimized out> backend_mail = 0x55559ecaed08 p = <optimized out> #23 0x00007f7211e20ba6 in fts_mail_precache (_mail=0x55559ec027f8) at fts-storage.c:555 mail = 0x55559ec027f8 fmail = 0x55559ec02f70 ft = 0x55559ebff760 ret = 0 __func__ = "fts_mail_precache" #24 0x00007f7212e48fae in mail_precache (mail=0x55559ec027f8) at mail.c:455 _data_stack_cur_id = 4 p = 0x55559ec027f8 ret = <optimized out> #25 0x000055559e522bb1 in index_mailbox_precache (conn=<optimized out>, box=0x55559eb9c498) at master-connection.c:119 counter = 1 max = 93 percentage_sent = 0 storage = <optimized out> status = {messages = 93, recent = 0, unseen = 0, uidvalidity = 1624964785, uidnext = 94, first_unseen_seq = 0, first_recent_uid = 94, last_cached_seq = 0, highest_modseq = 0, highest_pvt_modseq = 0, keywords = 0x0, permanent_flags = 0, flags = 0, permanent_keywords = false, allow_new_keywords = false, nonpermanent_modseqs = false, no_modseq_tracking = false, have_guids = true, have_save_guids = true, have_only_guid128 = false} uids = <optimized out> username = 0x55559eba0e18 "user1(a)company.net" first_uid = 1 percentage_str = "\261\376\332`" ---Type <return> to continue, or q <return> to quit--- percentage = <optimized out> error = MAIL_ERROR_NONE trans = 0x55559ebf1b00 ctx = 0x55559ebf3640 last_uid = 2 ret = 0 index_event = 0x55559ebf3250 box_vname = 0x55559eb9c830 "Virtual/All" errstr = <optimized out> search_args = 0x0 mail = 0x55559ec027f8 metadata = {guid = '\000' <repeats 15 times>, virtual_size = 0, physical_size = 0, first_save_date = 0, cache_fields = 0x0, precache_fields = (MAIL_FETCH_STREAM_HEADER | MAIL_FETCH_STREAM_BODY | MAIL_FETCH_RECEIVED_DATE | MAIL_FETCH_SAVE_DATE | MAIL_FETCH_PHYSICAL_SIZE | MAIL_FETCH_VIRTUAL_SIZE | MAIL_FETCH_UIDL_BACKEND | MAIL_FETCH_GUID | MAIL_FETCH_POP3_ORDER), backend_ns_prefix = 0x0, backend_ns_type = (unknown: 0)} seq = <optimized out> #26 index_mailbox (user=<optimized out>, user=<optimized out>, what=<optimized out>, max_recent_msgs=<optimized out>, mailbox=<optimized out>, conn=0x55559ebd8a80) at master-connection.c:238 box = 0x55559eb9c498 status = {messages = 2662839088, recent = 21845, unseen = 1, uidvalidity = 0, uidnext = 2662837936, first_unseen_seq = 21845, first_recent_uid = 313289502, last_cached_seq = 32626, highest_modseq = 140730969257744, highest_pvt_modseq = 93826223419056, keywords = 0x55559eb7aeb0, permanent_flags = 313289927, flags = 32626, permanent_keywords = false, allow_new_keywords = false, nonpermanent_modseqs = false, no_modseq_tracking = false, have_guids = true, have_save_guids = false, have_only_guid128 = false} errstr = <optimized out> ret = 0 ns = <optimized out> path = 0x55559eb74a50 "/home/vmail/domains/2/company.net/0/user1/Maildir/virtual/All" error = 93 sync_flags = <optimized out> #27 master_connection_input_line (line=<optimized out>, conn=0x55559ebd8a80) at master-connection.c:280 str = <optimized out> max_recent_msgs = 0 ret = <optimized out> args = <optimized out> input = {event_parent = 0x0, module = 0x55559e52343f "mail", service = 0x55559e523430 "indexer-worker", username = 0x55559eb72038 "user1(a)company.net", session_id = 0x0, session_id_prefix = 0x55559eb7205f "SLTLmOXFFIy5Ydlu", session_create_time = 0, local_ip = {family = 0, u = {ip6 = { __in6_u = {__u6_addr8 = '\000' <repeats 15 times>, __u6_addr16 = {0, 0, 0, 0, 0, 0, 0, 0}, __u6_addr32 = {0, 0, 0, 0}}}, ip4 = {s_addr = 0}}}, remote_ip = {family = 0, u = {ip6 = {__in6_u = { __u6_addr8 = '\000' <repeats 15 times>, __u6_addr16 = {0, 0, 0, 0, 0, 0, 0, 0}, __u6_addr32 = {0, 0, 0, 0}}}, ---Type <return> to continue, or q <return> to quit--- ip4 = {s_addr = 0}}}, local_port = 0, remote_port = 0, userdb_fields = 0x0, forward_fields = 0x0, flags_override_add = (unknown: 0), flags_override_remove = (unknown: 0), no_userdb_lookup = false, debug = false, conn_secured = false, conn_ssl_secured = false} service_user = 0x55559ebcb318 user = 0x55559eba0cf8 error = 0x0 #28 master_connection_input (conn=0x55559ebd8a80) at master-connection.c:320 _data_stack_cur_id = 3 line = <optimized out> #29 0x00007f7212b5c425 in io_loop_call_io (io=0x55559ec54760) at ioloop.c:715 ioloop = 0x55559eb7b050 t_id = 2 __func__ = "io_loop_call_io" #30 0x00007f7212b5ddab in io_loop_handler_run_internal (ioloop=ioloop@entry=0x55559eb7b050) at ioloop-epoll.c:222 ctx = 0x55559eb7bc40 events = <optimized out> list = 0x55559eb86770 io = <optimized out> tv = {tv_sec = 2147483, tv_usec = 0} events_count = <optimized out> msecs = <optimized out> ret = 1 i = 0 call = <optimized out> __func__ = "io_loop_handler_run_internal" #31 0x00007f7212b5c529 in io_loop_handler_run (ioloop=ioloop@entry=0x55559eb7b050) at ioloop.c:767 __func__ = "io_loop_handler_run" #32 0x00007f7212b5c768 in io_loop_run (ioloop=0x55559eb7b050) at ioloop.c:740 __func__ = "io_loop_run" #33 0x00007f7212ac63c3 in master_service_run (service=0x55559eb7aeb0, callback=callback@entry=0x55559e5225f0 <client_connected>) at master-service.c:862 No locals. #34 0x000055559e522437 in main (argc=1, argv=0x55559eb7ab90) at indexer-worker.c:76 storage_service_flags = (MAIL_STORAGE_SERVICE_FLAG_USERDB_LOOKUP | MAIL_STORAGE_SERVICE_FLAG_TEMP_PRIV_DROP | MAIL_STORAGE_SERVICE_FLAG_NO_IDLE_TIMEOUT) c = <optimized out> (gdb) quit Hope can be fixed. Thanks -- Alessio Cecchi Postmaster @ http://www.qboxmail.it https://www.linkedin.com/in/alessice

1 0

Dovecot 2.3.15 compilation fails
by Andreas M. Kirchwitz 29 Jun '21

29 Jun '21

Hello Dovecot users and developers! Up to Dovecot 2.3.14.1 manual compilation of Dovecot sources was fine, I have an old 32-bit Linux server with GCC 4.4.7 where I compile almost all things manually. Works fine, never had problems with GCC versions. env LDFLAGS="-Wl,--no-as-needed" ./configure --prefix=/usr/local/dovecot --with-ssl=openssl --with-ssldir=/usr/local/dovecot/etc/dovecot/certs make Unfortunately, Dovecot 2.3.15 fails to compile at test-smtp-params.c (works with a recent GCC 11.1.1 on my desktop, but servers usually come with older stuff). I know a little bit of programming but that's above my head what goes wrong here and how I could fix it to continue (so I don't know if that's the only problem or if there will be more). See below (at the end) for the exact error message. I assume this compilation issue was not an intentional change/requirement between 2.3.14(.1) and 2.3.15, it just happened. I don't think that the problem is in "test-smtp-params.c" itself but some declarations somewhere else are missing, but I'm no expert here. There were too many changes in the src/lib-smtp source tree to understand what may have caused this (or maybe it's even somewhere else). Any help is highly appreciated. I'd be happy to help and try out any ideas or patches. I'd like to see that Dovecot can be compiled on as many platforms as possible, as long as there are no fundamental requirements making this impossible. Thanks a lot in advance and keep up the good work, Andreas [last lines of compilation process when error happens] gcc -DHAVE_CONFIG_H -I. -I../.. -I../../src/lib -I../../src/lib-test -I../../src/lib-settings -I../../src/lib-master -I../../src/lib-sasl -I../../src/lib-ssl-iostream -I../../src/lib-dns -I../../src/lib-program-client -I../../src/lib-mail -DTEST_BIN_DIR=\"/usr/local/src/dovecot-2.3.15/src/lib-smtp/test-bin\" -std=gnu99 -g -O2 -fstack-protector -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -mfunction-return=keep -mindirect-branch=keep -Wall -W -Wmissing-prototypes -Wmissing-declarations -Wpointer-arith -Wchar-subscripts -Wformat=2 -Wbad-function-cast -fno-builtin-strftime -Wstrict-aliasing=2 -I/usr/local/OpenSSL-1.1.1/include -MT test-smtp-params.o -MD -MP -MF .deps/test-smtp-params.Tpo -c -o test-smtp-params.o test-smtp-params.c test-smtp-params.c:29: error: unknown field ‘data’ specified in initializer test-smtp-params.c:29: warning: missing braces around initializer test-smtp-params.c:29: warning: (near initialization for ‘test_params_buffer1.<anonymous>’) test-smtp-params.c:30: warning: missing initializer test-smtp-params.c:30: warning: (near initialization for ‘test_params_buffer1.<anonymous>.<anonymous>.used’) test-smtp-params.c:30: error: unknown field ‘used’ specified in initializer test-smtp-params.c:31: warning: excess elements in struct initializer test-smtp-params.c:31: warning: (near initialization for ‘test_params_buffer1’) test-smtp-params.c:33: error: unknown field ‘data’ specified in initializer test-smtp-params.c:33: warning: missing braces around initializer test-smtp-params.c:33: warning: (near initialization for ‘test_params_buffer2.<anonymous>’) test-smtp-params.c:34: warning: missing initializer test-smtp-params.c:34: warning: (near initialization for ‘test_params_buffer2.<anonymous>.<anonymous>.used’) test-smtp-params.c:34: error: unknown field ‘used’ specified in initializer test-smtp-params.c:35: warning: excess elements in struct initializer test-smtp-params.c:35: warning: (near initialization for ‘test_params_buffer2’) make[3]: *** [test-smtp-params.o] Error 1 make[3]: Leaving directory `/usr/local/src/dovecot-2.3.15/src/lib-smtp' make[2]: *** [all-recursive] Error 1 make[2]: Leaving directory `/usr/local/src/dovecot-2.3.15/src' make[1]: *** [all-recursive] Error 1 make[1]: Leaving directory `/usr/local/src/dovecot-2.3.15' make: *** [all] Error 2

7 6

acl_ignore_namespace & dovecot-acl-list files
by Vincent Brillault 29 Jun '21

29 Jun '21

Hi! After updating to 2.3.15, I was hoping to be able to get rid of some of the work-around I had in place when configuring shared folders in cluster mode in 2.3.14. Unfortunately it seems that I still need one. Running on CentOS7 with both a 'virtual' and 'shared' namespace, whenever I update the global vfile, I'm getting the following warning: ``` Error: open(/etc/dovecot/virtual/.temp.....8536.f1a78823779ee98d) failed: Read-only file system Error: dovecot-acl-list creation failed: safe_mkstemp(/etc/dovecot/virtual/.temp.....8536.) failed: Read-only file system Error: unlink(/etc/dovecot/virtual/dovecot-acl-list) failed: Read-only file system (in acl-backend-vfile-acllist.c:339) ``` I found it weird, as I'm using acl_ignore_namespace to ignore the virtual filesystem, but still dovecot seems to be trying to create a dovecot-acl-list file there. After digging into it and generating a backtrace where that error message is triggered, I believe I've trace it down to `acl_lookup_dict_rebuild`, which doesn't filter out "ignored" namespaces. The attached patch seems to solve the problem for me, but I must admit I didn't test it in depth so I'm not sure if I'm breaking something else... Let me know if I'm missing something, Thanks, Vincent PS: Some details: - Relevant configuration (let me know if I'm missing something): ``` mail_plugins = acl zlib virtual fts fts_solr namespace Virtual { prefix = Virtual/ separator = / hidden = yes list = no subscriptions = no location = virtual:/etc/dovecot/virtual:INDEX=~/virtual } namespace shared { type = shared prefix = shared/%%u/ list = children subscriptions = no location = imapc:~/shared/%%u } plugin { # ACLs acl = vfile:/etc/dovecot/dovecot-acl acl_ignore_namespace = Virtual/ acl_ignore_namespace2 = shared/* acl_shared_dict = proxy::acl } ``` - Backtrace generated manually (adding `backtrace_get(&backtrace)` & printing the result under the `dovecot-acl-list creation failed` error): ``` Raw backtrace: /usr/lib64/dovecot/libdovecot.so.0(backtrace_append+0x42) [0x7ff99d364862] -> /usr/lib64/dovecot/libdovecot.so.0(backtrace_get+0x1e) [0x7ff99d36496e] -> /usr/lib64/dovecot/lib01_acl_plugin.so(+0xb071) [0x7ff99ca9f071] -> /usr/lib64/dovecot/lib01_acl_plugin.so(acl_backend_vfile_acllist_rebuild+0x1d) [0x7ff99ca9f3ed] -> /usr/lib64/dovecot/lib01_acl_plugin.so(acl_backend_vfile_acllist_refresh+0x250) [0x7ff99ca9f6b0] -> /usr/lib64/dovecot/lib01_acl_plugin.so(acl_backend_vfile_nonowner_iter_init+0x9) [0x7ff99ca9f849] -> /usr/lib64/dovecot/lib01_acl_plugin.so(acl_lookup_dict_rebuild+0x13e) [0x7ff99caa179e] -> /usr/lib64/dovecot/lib01_acl_plugin.so(+0xb245) [0x7ff99ca9f245] -> /usr/lib64/dovecot/lib01_acl_plugin.so(acl_backend_vfile_acllist_rebuild+0x1d) [0x7ff99ca9f3ed] -> /usr/lib64/dovecot/lib01_acl_plugin.so(+0xa9ad) [0x7ff99ca9e9ad] -> /usr/lib64/dovecot/lib01_acl_plugin.so(+0x6e4c) [0x7ff99ca9ae4c] -> /usr/lib64/dovecot/lib01_acl_plugin.so(acl_object_get_my_rights+0x75) [0x7ff99ca9af35] -> /usr/lib64/dovecot/lib01_acl_plugin.so(+0xe44e) [0x7ff99caa244e] -> /usr/lib64/dovecot/libdovecot-storage.so.0(mailbox_exists+0x6e) [0x7ff99d6845fe] -> /usr/lib64/dovecot/libdovecot-storage.so.0(mailbox_list_mailbox+0x226) [0x7ff99d694ff6] -> /usr/lib64/dovecot/libdovecot-storage.so.0(mailbox_list_iter_init_namespaces+0x282) [0x7ff99d6eecf2] -> dovecot/imap [vbrillau XXXXX LIST](cmd_list_full+0x55b) [0x563f9bb004bb] -> dovecot/imap [vbrillau XXXXX LIST](command_exec+0x64) [0x563f9bb0ab04] -> dovecot/imap [vbrillau XXXXX LIST](+0x1d9e2) [0x563f9bb089e2] -> dovecot/imap [vbrillau XXXXX LIST](+0x1da71) [0x563f9bb08a71] -> dovecot/imap [vbrillau XXXXX LIST](client_handle_input+0x205) [0x563f9bb08ef5] -> dovecot/imap [vbrillau XXXXX LIST](client_input+0x79) [0x563f9bb094d9] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_call_io+0x65) [0x7ff99d38a425] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0x12b) [0x7ff99d38bdab] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_handler_run+0x59) [0x7ff99d38a529] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_run+0x38) [0x7ff99d38a768] -> /usr/lib64/dovecot/libdovecot.so.0(master_service_run+0x13) [0x7ff99d2f43c3] -> dovecot/imap [vbrillau XXXXX LIST](main+0x342) [0x563f9bafa2f2] -> /lib64/libc.so.6(__libc_start_main+0xf5) [0x7ff99ced1555] -> dovecot/imap [vbrillau XXXXX LIST](+0xf4f5) [0x563f9bafa4f5] ```

2 1

SSL23_GET_CLIENT_HELLO:unknown protocol
by Voytek Eymont 29 Jun '21

29 Jun '21

I have a user failing to get mail , using TBird client is this due to his TBird email client backlevel TLS support ? I'm trying to find out his TBird version, might be an older TBird # dovecot --version 2.3.15 (0503334ab1) # egrep "ssl_protocols|ssl_min_protocol" /etc/dovecot/conf.d/10-ssl.conf #ssl_min_protocol = TLSv1.2 Jun 29 14:23:27 pop3-login: Info: Disconnected: Connection closed: SSL_accept() failed: error:140760FC:SSL routines:SSL23_GET_CLIENT_HELLO:unknown protocol (no auth attempts in 1 secs): user=<>, rip= 111.222.333.555, lip=ser.ver.ip.add, TLS handshaking: SSL_accept() failed: error:140760FC:SSL routines:SSL23_GET_CLIENT_HELLO:unknown protocol, session=<kZ6p99/FW9iTMgHi> Jun 29 14:23:54 pop3-login: Info: Disconnected: Connection closed: SSL_accept() failed: error:140760FC:SSL routines:SSL23_GET_CLIENT_HELLO:unknown protocol (no auth attempts in 1 secs): user=<>, rip= 111.222.333.555, lip=ser.ver.ip.add, TLS handshaking: SSL_accept() failed: error:140760FC:SSL routines:SSL23_GET_CLIENT_HELLO:unknown protocol, session=<Gq5G+d/Fu1STMgHi>

2 2

Increase FTS timeouts for slow(er) machines
by Bojan Čekrlić 29 Jun '21

29 Jun '21

Hello list, I have a question which doesn’t seem to be answered by the documentation. I’m running Dovecot on a Raspberry PI-like computer. I’ve enabled full-text search (FTS) and installed Solr and Tika. Now, Dovecot will timeout Tika after 60 seconds and some emails will not get indexed as there’s simply not enough processing power on the device to work so fast. I don’t mind the slowness, so the question here is — how do I increase this timeout? Looking at the commits it seems that this option is hardcoded in the code and cannot be increased via configuration change? Thanks, B

2 2

good options for Multiple users on a common email account
by Pat G 28 Jun '21

28 Jun '21

Hi, i ve a mail server to manage with some email accounts but with multiples users (+50) using a common email. it indicates sometimes that it can't connect cause too many connections. what are the good options to allow a lot of users for a specific account ? i modifyied these options : auth_worker_max_count = 60 mail_max_userip_connections = 60 is it sufficient ? dovecot -n : auth_worker_max_count = 60 mail_location = maildir:/home/%u/Maildir namespace inbox { inbox = yes location = mailbox Drafts { special_use = \Drafts } mailbox Junk { special_use = \Junk } mailbox Sent { special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Trash { special_use = \Trash } prefix = } passdb { driver = pam } protocols = " imap" service imap-login { inet_listener imaps { port = 993 ssl = yes } } ssl_cert = </etc/ssl/certs/dovecot.pem ssl_key = # hidden, use -P to show it userdb { driver = passwd } protocol imap { mail_max_userip_connections = 60 } Regards, -- patg

3 3

Unable to run dovecot.2.3.15
by Joe Wong 28 Jun '21

28 Jun '21

Hello, I am trying to setup a new server on Centos 7 running 2.3.15, I compile the source with ./configure --with-pam , make then make install. I have another server using 2.3.8 so I copy my config files from there to /usr/local/etc/dovecot. I am using systemctl enable dovecot then systemctl start dovecot , however it failed to start. There is error found in /var/log/messages: Jun 28 09:14:37 new-ns1 systemd: Started Dovecot IMAP/POP3 email server. Jun 28 09:14:37 new-ns1 dovecot: Error: unlink(/usr/var/run/dovecot/login/login) failed: Read-only file system (in master-settings.c:739) Jun 28 09:14:37 new-ns1 dovecot: Error: unlink(/usr/var/run/dovecot/login/pop3) failed: Read-only file system (in master-settings.c:739) Jun 28 09:14:37 new-ns1 dovecot: Error: unlink(/usr/var/run/dovecot/login/imap) failed: Read-only file system (in master-settings.c:739) Jun 28 09:14:37 new-ns1 dovecot: Error: unlink(/usr/var/run/dovecot/login/dns-client) failed: Read-only file system (in master-settings.c:739) Jun 28 09:14:37 new-ns1 dovecot: Error: unlink(/usr/var/run/dovecot/login/ipc-proxy) failed: Read-only file system (in master-settings.c:739) Jun 28 09:14:37 new-ns1 dovecot: Error: unlink(/usr/var/run/dovecot/token-login/tokenlogin) failed: Read-only file system (in master-settings.c:739) Jun 28 09:14:37 new-ns1 dovecot: Error: unlink(/usr/var/run/dovecot/token-login/imap-urlauth) failed: Read-only file system (in master-settings.c:739) Jun 28 09:14:37 new-ns1 dovecot: Error: service(stats): unlink(/usr/var/run/dovecot/stats-reader) failed: Read-only file system Jun 28 09:14:37 new-ns1 dovecot: Error: service(stats): unlink(/usr/var/run/dovecot/stats-writer) failed: Read-only file system Jun 28 09:14:37 new-ns1 dovecot: Error: service(replicator): unlink(/usr/var/run/dovecot/replicator) failed: Read-only file system Jun 28 09:14:37 new-ns1 dovecot: Error: service(aggregator): unlink(/usr/var/run/dovecot/replication-notify) failed: Read-only file system Jun 28 09:14:37 new-ns1 dovecot: Error: service(aggregator): unlink(/usr/var/run/dovecot/replication-notify-fifo) failed: Read-only file system Jun 28 09:14:37 new-ns1 dovecot: Error: service(pop3): unlink(/usr/var/run/dovecot/login/pop3) failed: Read-only file system Jun 28 09:14:37 new-ns1 dovecot: Error: service(old-stats): unlink(/usr/var/run/dovecot/old-stats) failed: Read-only file system Jun 28 09:14:37 new-ns1 dovecot: Error: service(old-stats): unlink(/usr/var/run/dovecot/old-stats-mail) failed: Read-only file system Jun 28 09:14:37 new-ns1 dovecot: Error: service(old-stats): unlink(/usr/var/run/dovecot/old-stats-user) failed: Read-only file system Jun 28 09:14:37 new-ns1 dovecot: Error: service(log): unlink(/usr/var/run/dovecot/log-errors) failed: Read-only file system Jun 28 09:14:37 new-ns1 dovecot: Error: service(lmtp): unlink(/usr/var/run/dovecot/lmtp) failed: Read-only file system Jun 28 09:14:37 new-ns1 dovecot: Error: service(ipc): unlink(/usr/var/run/dovecot/ipc) failed: Read-only file system Jun 28 09:14:37 new-ns1 dovecot: Error: service(ipc): unlink(/usr/var/run/dovecot/login/ipc-proxy) failed: Read-only file system Jun 28 09:14:37 new-ns1 dovecot: Error: service(indexer-worker): unlink(/usr/var/run/dovecot/indexer-worker) failed: Read-only file system Jun 28 09:14:37 new-ns1 dovecot: Error: service(indexer): unlink(/usr/var/run/dovecot/indexer) failed: Read-only file system Jun 28 09:14:37 new-ns1 dovecot: Error: service(imap): unlink(/usr/var/run/dovecot/login/imap) failed: Read-only file system Jun 28 09:14:37 new-ns1 dovecot: Error: service(imap): unlink(/usr/var/run/dovecot/imap-master) failed: Read-only file system Jun 28 09:14:37 new-ns1 dovecot: Error: service(imap-urlauth-worker): unlink(/usr/var/run/dovecot/imap-urlauth-worker) failed: Read-only file system Jun 28 09:14:37 new-ns1 dovecot: Error: service(imap-urlauth): unlink(/usr/var/run/dovecot/token-login/imap-urlauth) failed: Read-only file system Jun 28 09:14:37 new-ns1 dovecot: Error: service(imap-urlauth-login): unlink(/usr/var/run/dovecot/imap-urlauth) failed: Read-only file system Jun 28 09:14:37 new-ns1 dovecot: Error: service(imap-hibernate): unlink(/usr/var/run/dovecot/imap-hibernate) failed: Read-only file system Jun 28 09:14:37 new-ns1 dovecot: Error: service(doveadm): unlink(/usr/var/run/dovecot/doveadm-server) failed: Read-only file system Jun 28 09:14:37 new-ns1 dovecot: Error: service(dns-client): unlink(/usr/var/run/dovecot/dns-client) failed: Read-only file system Jun 28 09:14:37 new-ns1 dovecot: Error: service(dns-client): unlink(/usr/var/run/dovecot/login/dns-client) failed: Read-only file system Jun 28 09:14:37 new-ns1 dovecot: Error: service(director): unlink(/usr/var/run/dovecot/director-admin) failed: Read-only file system Jun 28 09:14:37 new-ns1 dovecot: Error: service(director): unlink(/usr/var/run/dovecot/director-userdb) failed: Read-only file system Jun 28 09:14:37 new-ns1 dovecot: Error: service(dict): unlink(/usr/var/run/dovecot/dict) failed: Read-only file system Jun 28 09:14:37 new-ns1 dovecot: Error: service(dict-async): unlink(/usr/var/run/dovecot/dict-async) failed: Read-only file system Jun 28 09:14:37 new-ns1 dovecot: Error: service(config): unlink(/usr/var/run/dovecot/config) failed: Read-only file system Jun 28 09:14:37 new-ns1 dovecot: Error: service(auth): unlink(/usr/var/run/dovecot/login/login) failed: Read-only file system Jun 28 09:14:37 new-ns1 dovecot: Error: service(auth): unlink(/usr/var/run/dovecot/token-login/tokenlogin) failed: Read-only file system Jun 28 09:14:37 new-ns1 dovecot: Error: service(auth): unlink(/usr/var/run/dovecot/auth-login) failed: Read-only file system Jun 28 09:14:37 new-ns1 dovecot: Error: service(auth): unlink(/usr/var/run/dovecot/auth-client) failed: Read-only file system Jun 28 09:14:37 new-ns1 dovecot: Error: service(auth): unlink(/usr/var/run/dovecot/auth-userdb) failed: Read-only file system Jun 28 09:14:37 new-ns1 dovecot: Error: service(auth): unlink(/usr/var/run/dovecot/auth-master) failed: Read-only file system Jun 28 09:14:37 new-ns1 dovecot: Error: service(auth-worker): unlink(/usr/var/run/dovecot/auth-worker) failed: Read-only file system Jun 28 09:14:37 new-ns1 dovecot: Error: service(anvil): unlink(/usr/var/run/dovecot/anvil) failed: Read-only file system Jun 28 09:14:37 new-ns1 dovecot: Error: service(anvil): unlink(/usr/var/run/dovecot/anvil-auth-penalty) failed: Read-only file system Jun 28 09:14:37 new-ns1 dovecot: Fatal: Failed to start listeners Jun 28 09:14:37 new-ns1 systemd: dovecot.service: main process exited, code=exited, status=89/n/a Jun 28 09:14:37 new-ns1 systemd: Unit dovecot.service entered failed state. Jun 28 09:14:37 new-ns1 systemd: dovecot.service failed. What did I miss here ?

4 5

Dovecot mailing list and DKIM
by Kevin N. 28 Jun '21

28 Jun '21

Hello everybody, Going through my mail logs I noticed that a couple of messages from the Dovecot mailing list failed DKIM validation. For example, this one has failed: https://markmail.org/message/te7tycmpiutw4kia 'opendkim-testkey' shows that the key is OK. The messages in the example comes from yahoo.com, however other messages from yahoo.com, ones that are not sent through the mailing list, are properly validated. The failure is not specific to yahoo.com since a couple of other messages from other domains, sent though the mailing list, also failed DKIM validation. However, the vast majority of the messages from the list properly pass DKIM validation. From what I have read, mailing lists in general do not play very well with DKIM or SPF and the Dovecot mailing list also had some issues with this in the past. With the Dovecot mailing list, I am a bit curious about why the vast majority of the messages from the list pass DKIM validation while a couple of them fail. Does the Dovecot mailing list software alter the message in a way that causes the failure? Or is there something else going on? Any thoughts? Cheers.

4 9

ZLIB/ZSTD Compressed MBOX in Maildir++ layout
by Pedro Ribeiro 28 Jun '21

28 Jun '21

Hello everyone! Our archive namespace is kept in MBOX format with Maildir++ layout due to: * Need to have the email from all users/folders self contained (our base namespace uses MDBOX with single instance storage of attachments) * MBOX/FS layout isn't supported because some folders have messages and subfolders. I'm trying to compress that namespace using zstd/gzip following the informations from Dovecot documentation about the zlib plugin but when the (MBOX/Maildir++) compress and become with .zst/.zstd/.gz suffix (both tested) the system can't read the mailboxes and incorrectly reports the suffix (.zstd/.gz) as a subfolder name (following the Maildir++ file structure). Is there any way to make the MBOX/Maildir++ compatible with the zlib compression? Using Dovecot 2.3.14 on Debian10 Regards. -- Best regards, =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Pedro Ribeiro Politécnico de Lisboa, Serviços da Presidência Departamento de Sistemas de Informação e Comunicações Phone: +351 210 464 700 (general) / VoIP: 80100 Helpdesk: helpdesk(a)net.ipl.pt / https://www.net.ipl.pt =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

2 5

Problem with Lua notification script since 2.3.15 update
by Ralf Becker 28 Jun '21

28 Jun '21

If the Lua-notifications are enabled, Dovecot imap dies immediately at authentication: Jun 28 09:17:29 imap-login: Info: Login: user=<ralf>, method=PLAIN, rip=172.18.0.12, lip=172.18.0.16, mpid=16, TLS, session=<dDhm9c/FYtqsEgAM> Jun 28 09:17:29 imap(ralf)<16><dDhm9c/FYtqsEgAM>: Panic: file dlua-script.c: line 224 (dlua_script_init): assertion failed: (lua_gettop(script->L) == 0) Jun 28 09:17:29 imap(ralf)<16><dDhm9c/FYtqsEgAM>: Error: Raw backtrace: /usr/lib/dovecot/libdovecot.so.0(backtrace_append+0x41) [0x7f9f537ca5c1] -> /usr/lib/dovecot/libdovecot.so.0(backtrace_get+0x22) [0x7f9f537ca6e2] -> /usr/lib/dovecot/libdovecot.so.0(+0x1070bb) [0x7f9f537d70bb] -> /usr/lib/dovecot/libdovecot.so.0(+0x107157) [0x7f9f537d7157] -> /usr/lib/dovecot/libdovecot.so.0(+0x5bb2b) [0x7f9f5372bb2b] -> /usr/lib/dovecot/libdovecot-lua.so.0(+0x5354) [0x7f9f53311354] -> /usr/lib/dovecot/modules/lib22_push_notification_lua_plugin.so(+0x3842) [0x7f9f532c6842] -> /usr/lib/dovecot/modules/lib20_push_notification_plugin.so(push_notification_driver_init+0x19c) [0x7f9f532d062c] -> /usr/lib/dovecot/modules/lib20_push_notification_plugin.so(+0x846f) [0x7f9f532d246f] -> /usr/lib/dovecot/modules/lib20_push_notification_plugin.so(+0x8b6a) [0x7f9f532d2b6a] -> /usr/lib/dovecot/libdovecot-storage.so.0(hook_mail_user_created+0x211) [0x7f9f539084e1] -> /usr/lib/dovecot/libdovecot-storage.so.0(mail_user_init+0x20b) [0x7f9f5390e80b] -> /usr/lib/dovecot/libdovecot-storage.so.0(mail_storage_service_next_with_session_suffix+0x587) [0x7f9f5390bd57] -> /usr/lib/dovecot/libdovecot-storage.so.0(mail_storage_service_lookup_next+0x53) [0x7f9f5390c4c3] -> dovecot/imap(client_create_from_input+0x180) [0x5626eb18fe40] -> dovecot/imap(+0x3112a) [0x5626eb19012a] -> /usr/lib/dovecot/libdovecot.so.0(+0x8d60e) [0x7f9f5375d60e] -> /usr/lib/dovecot/libdovecot.so.0(+0x8d97b) [0x7f9f5375d97b] -> /usr/lib/dovecot/libdovecot.so.0(+0x8e8be) [0x7f9f5375e8be] -> /usr/lib/dovecot/libdovecot.so.0(connection_input_default+0x15e) [0x7f9f537cef5e] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_call_io+0x6d) [0x7f9f537ed3ed] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0x145) [0x7f9f537eea15] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run+0x54) [0x7f9f537ed494] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_run+0x40) [0x7f9f537ed600] -> /usr/lib/dovecot/libdovecot.so.0(master_service_run+0x17) [0x7f9f537609e7] -> dovecot/imap(main+0x469) [0x5626eb172c19] -> /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf3) [0x7f9f535020b3] -> dovecot/imap(_start+0x2e) [0x5626eb172cae] Jun 28 09:17:29 imap(ralf)<16><dDhm9c/FYtqsEgAM>: Fatal: master: service(imap): child 16 killed with signal 6 (core dumps disabled - https://dovecot.org/bugreport.html#coredumps) I use the following Dovecot configuration: # Store METADATA information in a file dovecot-metadata in user's home mail_attribute_dict = file:%h/dovecot-metadata # enable metadata protocol imap { imap_metadata = yes } # add necessary plugins for Lua push notifications mail_plugins = $mail_plugins mail_lua notify push_notification push_notification_lua # Lua notification script and URL of EGroupware push server plugin { push_notification_driver = lua:file=/etc/dovecot/dovecot-push.lua push_lua_url = https://Bearer:secret@boulder.egroupware.org/egroupware/push } The Lua script is available under https://github.com/EGroupware/swoolepush/blob/master/doc/dovecot-push.lua The whole Dovecot configurations is available under https://github.com/EGroupware/build.opensuse.org/tree/master/server:eGroupW… Dovecot runs in a Ubuntu 20.04 based container and seems to use the correct liblua5.3: root@750978e5c0ee:/# dpkg -l|grep -i lua ii dovecot-lua 2:2.3.15-1+ubuntu20.04 amd64 secure POP3/IMAP server - LUA support ii liblua5.3-0:amd64 5.3.3-1.1ubuntu2 amd64 Shared library for the Lua interpreter version 5.3 ii lua-json 1.3.4-2 all JSON decoder/encoder for Lua ii lua-lpeg:amd64 1.0.2-1 amd64 LPeg library for the Lua language ii lua-socket:amd64 3.0~rc1+git+ac3201d-4 amd64 TCP/UDP socket library for the Lua language Everything was running fine with 2.3.13, have not tried with 2.3.14 yet. Any ideas? Ralf -- Ralf Becker EGroupware GmbH [www.egroupware.org] Handelsregister HRB Kaiserslautern 3587 Geschäftsführer Birgit und Ralf Becker Leibnizstr. 17, 67663 Kaiserslautern, Germany Telefon +49 631 31657-0

3 4

[BUG] doveadm / mail-crypt: Error when setting new password for a user key
by Kevin N. 28 Jun '21

28 Jun '21

Dovecot version: 2.3.14 When setting a new password for a user key you have the option to prompt the user for the old and the new password, instead of providing them as parameters (using -N and -O instead of -n and -o). However, running: doveadm mailbox cryptokey password -u user@domain -N -O produces an error instead of prompting the user for the old and the new password. The error is: password: option requires an argument -- 'O' You can work around this by providing a dummy input for -O which seems to be properly ignored in the end, but it would be nice to not throw any errors since -O should not expect an argument. Regards.

2 5

Support client_id variable expansion
by Eirik Rye 28 Jun '21

28 Jun '21

Hello, We are using imap_id_log='*' (and imap_id_retain=yes) to log user client information to the dovecot logs, and this information is aggregated to give us extra debugging information for customer support. However, as some clients send the ID information pre-login and others send it post-login, the aggregation logic is needlessly complex as we need to correlate the session IDs of the pre-login ID messages in order to determine the correct user. Hoping to simplify this, I wanted to log the client_id variable on logout, in imap_logout_format: imap_logout_format = in=%i out=%o deleted=%{deleted} expunged=%{expunged} trashed=%{trashed} hdr_count=%{fetch_hdr_count} hdr_bytes=%{fetch_hdr_bytes} body_count=%{fetch_body_count} body_bytes=%{fetch_body_bytes} client_id="%{client_id}" However, this only results in the following log being printed: client_id="UNSUPPORTED_VARIABLE_client_id" While examining the source code (login-common/client-common.c), it seems like this could be trivially supported by adding `client_id` to the `login_var_expand_empty_tab` struct, and adding the relevant code to populate this variable to `get_var_expand_table(struct client *client)`. I am willing to write a pull request for this, unless I am missing some obvious reason why expansion of the client's `client_id` field is not supported in the first place? - Eirik

2 1

Re: [Dovecot-news] Dovecot v2.3.15 released
by Daniel J. Luke 28 Jun '21

28 Jun '21

On Jun 21, 2021, at 7:20 AM, Timo Sirainen <timo(a)sirainen.com> wrote: > Here's a new release with some security fixes and quite a lot of other changes as well. > > * Removed support for Lua 5.2. Use version 5.1 or 5.3 instead. Looks like it doesn't want to build w/o lua now. On my MacOS system configure says: checking whether we will be linking in Lua... no ... but after fixing the implicit i_gettimeofday declaration, build fails with: /bin/sh ../../libtool --tag=CC --mode=link gcc -std=gnu99 -g -O2 -fstack-protector-strong -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -Wall -W -Wmissing-prototypes -Wmissing-declarations -Wpointer-arith -Wchar-subscripts -Wformat=2 -Wbad-function-cast -Wno-duplicate-decl-specifier -Wstrict-aliasing=2 -I/opt/local/include -no-undefined -L/opt/local/lib -o libdict_lua.la libtool: link: ar cru .libs/libdict_lua.a ar: no archive members specified (this doesn't happen with 2.3.14.1) -- Daniel J. Luke

5 7

Backing up per user keys for mailcrypt
by Ben Burk 28 Jun '21

28 Jun '21

I am wondering how I can back up keys for mail users in their password-protected form, without exporting them from `doveadm mailbox cryptokey export`, which requires a password. The goal here is to perform routine backups to keep keys current. Relevant config is as follows: mail_attribute_dict = file:%h/Maildir/dovecot-attributes mail_plugins = $mail_plugins mail_crypt plugin { mail_crypt_curve = secp521r1 mail_crypt_save_version = 2 mail_crypt_require_encrypted_user_key = yes } Am i correct in assuming I should back up the dovecot-attributes file? Are there any ancillary files that need to be backed up as well, such as indexes, to properly read and handle this file? I have viewed the file and it appears there are several keys at play for a single mail user. Do different folders in a users imap space have different encryption keys? Are all of these keys populated in this dovecot-attributes file? Is there any established procedure for restoring keys? Is it as simple as placing the dovecot-attributes file, if that is infact what needs to be backed up beforehand to perform a restore. -- Ben Burk BURK.TECH System Administrator

2 1

Python module for HTTP API
by Michael Ströder 28 Jun '21

28 Jun '21

HI! Can anybody recommend a high-level Python module for accessing doveadm's HTTP API? [1] Ciao, Michael. [1] https://doc.dovecot.org/admin_manual/doveadm_http_api/

3 4

Quota Config With Prefetch Creating Alias Directories
by dovecot＠ptld.com 27 Jun '21

27 Jun '21

Using Dovecot 2.3.8 with Postfix & MySQL on Centos. I have a sql table with account info, email addresses, password, quotas, etc I have another sql table for aliases containing which alias points to what email address. For imap access im using passdb password_query with prefetch. I setup quotas using count and configured postfix to check quotas with check_policy_service before accepting email. Discovered that it wont lookup quotas using prefetch. Added a second userdb so quota request can use user_query instead of the imap password_query prefetch version. userdb { driver = sql args = /etc/dovecot/mysql_quota.include skip = found result_success = return-ok result_failure = return-ok } This worked for existing email addresses in the accounts table. But any email sent to an alias was rejected because user not found. Not by postfix, postfix can see its an alias, but when postfix does check_policy_service dovecot issued the rejection because its not finding the alias in the accounts table per the userdb user_query. I added "result_failure = return-ok" to the userdb so if user_query doesn't find the address postfix is asking to accept mail for, it will fall back on quota default values. Then dovecot isn't forcing the mail to be rejected and postfix knows if its a valid user or alias. This seems to solve the issue, dovecot will return per user quotas or if not found then the global quota and let postfix decided whats a valid address to accept or reject. But now there is a side effect. Every time you ask dovecot for a quota, and if its a first time use of a newly created account dovecot creates the index directories and index files on disk. Because im using result_failure=return-ok which tells dovecot the user was found to prevent aliases from being rejected, dovecot is also creating directories and indexes for those aliases postfix is sending over check_policy_service. First question: Is this the best way to configure dovecot using quota verification for postfix to work will aliases? Second question: How can i prevent directories and indexes being created for non found user (aliases) accounts? Thank you.

2 3

Dovecot v2.3.14.1 released
by Timo Sirainen 24 Jun '21

24 Jun '21

Hi, This is an "important fixes only" release in case you don't want to upgrade to v2.3.15. There is no matching Pigeonhole release - use the same v2.3.14 instead. https://dovecot.org/releases/2.3/dovecot-2.3.14.1.tar.gz <https://dovecot.org/releases/2.3/dovecot-2.3.14.1.tar.gz> https://dovecot.org/releases/2.3/dovecot-2.3.14.1.tar.gz.sig <https://dovecot.org/releases/2.3/dovecot-2.3.14.1.tar.gz.sig> Binary packages in https://repo.dovecot.org/ <https://repo.dovecot.org/> Docker images in https://hub.docker.com/r/dovecot/dovecot <https://hub.docker.com/r/dovecot/dovecot> * CVE-2021-29157: Dovecot does not correctly escape kid and azp fields in JWT tokens. This may be used to supply attacker controlled keys to validate tokens, if attacker has local access. * CVE-2021-33515: On-path attacker could have injected plaintext commands before STARTTLS negotiation that would be executed after STARTTLS finished with the client. - lib-index: Corrupted mime.parts in dovecot.index.cache may have resulted in Panic: file imap-bodystructure.c: line 206 (part_write_body): assertion failed: (text == ((part->flags & MESSAGE_PART_FLAG_TEXT) != 0)) - imap: SETMETADATA could not be used to unset metadata values. Instead NIL was handled as a "NIL" string. v2.3.14 regression.

3 4

Dovecot v2.3.15 released
by Timo Sirainen 23 Jun '21

23 Jun '21

Hi, Here's a new release with some security fixes and quite a lot of other changes as well. https://dovecot.org/releases/2.3/dovecot-2.3.15.tar.gz <https://dovecot.org/releases/2.3/dovecot-2.3.15.tar.gz> https://dovecot.org/releases/2.3/dovecot-2.3.15.tar.gz.sig <https://dovecot.org/releases/2.3/dovecot-2.3.15.tar.gz.sig> Binary packages in https://repo.dovecot.org/ <https://repo.dovecot.org/> Docker images in https://hub.docker.com/r/dovecot/dovecot <https://hub.docker.com/r/dovecot/dovecot> * CVE-2021-29157: Dovecot does not correctly escape kid and azp fields in JWT tokens. This may be used to supply attacker controlled keys to validate tokens, if attacker has local access. * CVE-2021-33515: On-path attacker could have injected plaintext commands before STARTTLS negotiation that would be executed after STARTTLS finished with the client. * Disconnection log messages are now more standardized across services. They also always now start with "Disconnected" prefix. * Dovecot now depends on libsystemd for systemd integration. * Removed support for Lua 5.2. Use version 5.1 or 5.3 instead. * config: Some settings are now marked as "hidden". It's discouraged to change these settings. They will no longer be visible in doveconf output, except if they have been changed or if doveconf -s parameter is used. See https://doc.dovecot.org/settings/advanced/ for details. * imap-compress: Compression level is now algorithm specific. See https://doc.dovecot.org/settings/plugin/compress-plugin/ * indexer-worker: Convert "Indexed" info logs to an event named "indexer_worker_indexing_finished". See https://doc.dovecot.org/admin_manual/list_of_events/#indexer-worker-indexin… + Add TSLv1.3 support to min_protocols. + Allow configuring ssl_cipher_suites. (for TLSv1.3+) + acl: Add acl_ignore_namespace setting which allows to entirely ignore ACLs for the listed namespaces. + imap: Support official RFC8970 preview/snippet syntax. Old methods of retrieving preview information via IMAP commands ("SNIPPET and PREVIEW with explicit algorithm selection") have been deprecated. + imapc: Support INDEXPVT for imapc storage to enable private message flags for cluster wide shared mailboxes. + lib-storage: Add new events: mail_opened, mail_expunge_requested, mail_expunged, mail_cache_lookup_finished. See https://doc.dovecot.org/admin_manual/list_of_events/#mail + zlib, imap-compression, fs-compress: Support compression levels that the algorithm supports. Before, we would allow hardcoded value between 1 to 9 and would default to 6. Now we allow using per-algorithm value range and default to whatever default the algorithm specifies. - *-login: Commands pipelined together with and just after the authenticate command cause these commands to be executed twice. This applies to all protocols that involve user login, which currently comprises of imap, pop3, submisision and managesieve. - *-login: Processes are supposed to disconnect the oldest non-logged in connection when process_limit was reached. This didn't actually happen with the default "high-security mode" (with service_count=1) where each connection is handled by a separate process. - *-login: When login process reaches client/process limits, oldest client connections are disconnected. If one of these was still doing anvil lookup, this caused a crash. This could happen only if the login process limits were very low or if the server was overloaded. - Fixed building with link time optimizations (-flto). - auth: Userdb iteration with passwd driver does not always return all users with some nss drivers. - dsync: Shared INBOX not synced when "mail_shared_explicit_inbox" was disabled. If a user has a shared mailbox which is another user's INBOX, dsync didn't include the mailbox in syncing unless explicit naming is enabled with "mail_shared_explicit_inbox" set to "yes". - dsync: Shared namespaces were not synced with "-n" flag. - dsync: Syncing shared INBOX failed if mail_attribute_dict was not set. If a user has a shared mailbox that is another user's INBOX, dsync failed to export the mailbox if mail attributes are disabled. - fts-solr, fts-tika: Using both Solr FTS and Tika may have caused HTTP requests to assert-crash: Panic: file http-client-request.c: line 1232 (http_client_request_send_more): assertion failed: (req->payload_input != NULL) - fts-tika: 5xx errors returned by Tika server as indexing failures. However, Tika can return 5xx for some attachments every time. So the 5xx error should be retried once, but treated as success if it happens on the retry as well. v2.3 regression. - fts-tika: v2.3.11 regression: Indexing messages with fts-tika may have resulted in Panic: file message-parser.c: line 802 (message_parser_deinit_from_parts): assertion failed: (ctx->nested_parts_count == 0 || i_stream_have_bytes_left(ctx->input)) - imap: SETMETADATA could not be used to unset metadata values. Instead NIL was handled as a "NIL" string. v2.3.14 regression. - imap: IMAP BINARY FETCH crashes at least on empty base64 body: Panic: file index-mail-binary.c: line 358 (blocks_count_lines): assertion failed: (block_count == 0 || block_idx+1 == block_count) - imap: If IMAP client using the NOTIFY command was disconnected while sending FETCH notifications to the client, imap could crash with Panic: Trying to close mailbox INBOX with open transactions. - imap: Using IMAP COMPRESS extension can cause IMAP connection to hang when IMAP commands are >8 kB long. - imapc: If remote server sent BYE but didn't immediately disconnect, it could cause infinite busy-loop. - lib-index: Corrupted cache record size in dovecot.index.cache file could have caused a crash (segfault) when accessing it. - lib-oauth2: JWT token time validation now works correctly with 32-bit systems. - lib-ssl-iostream: Checking hostnames against an SSL certificate was case-sensitive. - lib-storage: Corrupted mime.parts in dovecot.index.cache may have resulted in Panic: file imap-bodystructure.c: line 206 (part_write_body): assertion failed: (text == ((part->flags & MESSAGE_PART_FLAG_TEXT) != 0)) - lib-storage: Index rebuilding (e.g. via doveadm force-resync) didn't preserve the "hdr-pop3-uidl" header. Because of this, the next pop3 session could have accessed all of the emails' metadata to read their POP3 UIDL (opening dbox files). - listescape: When using the listescape plugin and a shared namespace the plugin didn't work properly anymore resulting in errors like: "Invalid mailbox name: Name must not have '/' character." - lmtp: Connection crashes if connection gets disconnected due to multiple bad commands and the last bad command is BDAT. - lmtp: The Dovecot-specific LMTP parameter XRCPTFORWARD was blindly forwarded by LMTP proxy without checking that the backend has support. This caused a command parameter error from the backend if it was running an older Dovecot release. This could only occur in more complex setups where the message was proxied twice; when the proxy generated the XRCPTFORWARD parameter itself the problem did not occur, so this only happened when it was forwarded. - lmtp: The LMTP proxy crashes with a panic when the remote server replies with an error while the mail is still being forwarded through a DATA/BDAT command. - lmtp: Username may have been missing from lmtp log line prefixes when it was performing autoexpunging. - master: Dovecot would incorrectly fail with haproxy 2.0.14 service checks. - master: Systemd service: Dovecot announces readiness for accepting connections earlier than it should. The following environment variables are now imported automatically and can be omitted from import_environment setting: NOTIFY_SOCKET LISTEN_FDS LISTEN_PID. - master: service { process_min_avail } was launching processes too slowly when master was forking a lot of processes. - util: Make the health-check.sh example script POSIX shell compatible.

4 4

Quota warning script is never sent when reverse=yes
by Jesús Ángel del Pozo Domínguez 23 Jun '21

23 Jun '21

Hi there, I set up Dovecot to call a quota warning script: plugin { quota_warning = storage=100%% quota-warning 100 %u quota_warning2 = storage=95%% quota-warning 95 %u quota_warning3 = storage=80%% quota-warning 80 %u quota_warning4 = -storage=100%% quota-warning below %u } The script is called whenever the quota exceeds the corresponding amount (80%, 95% and 100%). However, on deleting messages to free space, the script is not being called even though the quota drops below 100%. I have manually tested the script, and it works: $ /usr/local/bin/quota-warning.sh below user(a)foo.bar Could you please give me any hint to fix this. I would like to call the quota-warning script so that I can clear the over_quota_flag field in the database. Regards,

1 0

ssl_min_protocol v2.3.15
by Theo Pannen 23 Jun '21

23 Jun '21

Hello, it seems that the default value for ssl_min_protocol has changed from TLSv1 to TLSv1.2, right? After upgrading to v2.3.15 and with ssl_min_protocol commented out, the server no longer offers TLSv1 and TLSv1.1. This is a good idea, but should be documented. Theo

2 1

CVE-2021-33515: SMTP Submission service STARTTLS injection
by Timo Sirainen 22 Jun '21

22 Jun '21

Open-Xchange Security Advisory 2021-06-21 Product: Dovecot Vendor: OX Software GmbH Internal reference: DOV-4583 (Bug ID) Vulnerability type: CWE-74: Failure to Sanitize Data into a Different Plane ('Injection') Vulnerable version: 2.3.0-2.3.14 Vulnerable component: submission Report confidence: Confirmed Solution status: Fixed by Vendor Fixed version: 2.3.14.1 Vendor notification: 2021-05-21 Solution date: 2021-05-22 Public disclosure: 2021-06-21 CVE reference: CVE-2021-33515 CVSS: 4.2 (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N) Researcher credit: Fabian Ising and Damian Poddebniak of Münster University of Applied Sciences Vulnerability Details: On-path attacker could inject plaintext commands before STARTTLS negotiation that would be executed after STARTTLS finished with the client. Only the SMTP submission service is affected. Risk: Attacker can potentially steal user credentials and mails. The attacker needs to have sending permissions on the submission server (a valid username and password). Workaround: None. Solution: Operators should update to 2.3.14.1 or later version.

3 3

Dovecot deliver and imap process hangs
by Rok Saksida 22 Jun '21

22 Jun '21

Hello. Dovecot version: 2.2.36 OS: CentOS Linux release 7.9.2009 (Core) Kernel: 3.10.0-1160.11.1.el7.x86_64 I have two dovecot servers in replication master/master. Sometimes happens that deliver or imap process hangs and causing high CPU usage. In log's I only see locking failures but not initial cause why this happened. For mail storage I use ZFS pool with compression enabled. I made some digging and find this option: mmap_disable = yes. I will try this setting today evening. But I wondering if you have any idea why this happening and how to start solving this problems? Is there any additional setting like mmap_disable that can help solved this issues? -- BR

1 0

Upgrade path
by Andrea Gabellini 22 Jun '21

22 Jun '21

Hello, I have a configuration with two proxy/director and two backend with replication. All at version 2.3.10.1. What is the suggested upgrade path to 2.3.15? I think to switch traffic to only one proxy and one backend and upgrade the two servers that remain without traffic. Then I switch the traffic to these upgraded servers and proceed with the upgrade of the others two. Is this correct? Or is best to upgrade first the two proxy/director and next the two backend? Thanks, Andrea -- __________________________ Business is like riding a bicycle. Either you keep moving or you fall down. __________________________ TIM San Marino S.p.A. Andrea Gabellini Engineering R&D TIM San Marino S.p.A. - https://www.telecomitalia.sm Via Ventotto Luglio, 212 - Piano -2 47893 - Borgo Maggiore - Republic of San Marino Tel: (+378) 0549 886237 Fax: (+378) 0549 886188 -- Informativa Privacy Questa email ha per destinatari dei contatti presenti negli archivi di TIM San Marino S.p.A.. Tutte le informazioni vengono trattate e tutelate nel rispetto della normativa vigente sulla protezione dei dati personali (Reg. EU 2016/679). Per richiedere informazioni e/o variazioni e/o la cancellazione dei vostri dati presenti nei nostri archivi potete inviare una email a privacy(a)telecomitalia.sm. Avviso di Riservatezza Il contenuto di questa e-mail e degli eventuali allegati e' strettamente confidenziale e destinato alla/e persona/e a cui e' indirizzato. Se avete ricevuto per errore questa e-mail, vi preghiamo di segnalarcelo immediatamente e di cancellarla dal vostro computer. E' fatto divieto di copiare e divulgare il contenuto di questa e-mail. Ogni utilizzo abusivo delle informazioni qui contenute da parte di persone terze o comunque non indicate nella presente e-mail potra' essere perseguito ai sensi di legge.

1 0

CVE-2021-29157: oauth2 JWT local validation path traversal
by Timo Sirainen 21 Jun '21

21 Jun '21

Open-Xchange Security Advisory 2021-06-21 Product: Dovecot Vendor: OX Software GmbH Internal reference: DOV-4476 (Bug ID) Vulnerability type: CWE-24: Path Traversal: '../filedir' Vulnerable version: 2.3.11-2.3.14 Vulnerable component: imap, pop3, submission, managesieve Report confidence: Confirmed Solution status: Fixed by Vendor Fixed version: 2.3.14.1 Vendor notification: 2021-03-22 Solution date: 2021-04-14 Public disclosure: 2021-06-21 CVE reference: CVE-2021-29157 CVSS: 6.7 (CVSS3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N) Researcher credit: Kirin of Tencent Security Xuanwu Lab Vulnerability Details: Dovecot does not correctly escape kid and azp fields in JWT tokens. This may be used to supply attacker controlled keys to validate tokens in some configurations. This requires attacker to be able to write files to local disk. Risk: Local attacker can login as any user and access their emails. Workaround: Disable local JWT validation in oauth2, or use a different dict driver than fs:posix. Solution: Operators should update to 2.3.14.1 or later version.

1 0

CVE-2020-28200: Sieve excessive resource usage
by Timo Sirainen 21 Jun '21

21 Jun '21

Open-Xchange Security Advisory 2021-06-21 Product: Dovecot Vendor: OX Software GmbH Internal reference: DOV-4159 (Bug ID) Vulnerability type: CWE-400 Vulnerable version: 1.2.0-2.3.14 Vulnerable component: lmtp, lda Report confidence: Confirmed Solution status: Fixed by Vendor Fixed version: 2.3.15 Vendor notification: 2020-09-23 Solution date: 2020-12-07 Public disclosure: 2021-06-21 CVE reference: CVE-2020-28200 CVSS: 4.3 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L) Researcher credit: Innokentii Sennovskii from BI.ZONE Vulnerability Details: Sieve interpreter is not protected against abusive scripts that claim excessive resource usage. Especially scripts using massive amounts of regexps. Risk: Attacker can DoS the mail delivery system by using excessive amount of CPU and/or reaching the lmtp/lda process limits. Workaround: Disabling the regex sieve extension avoids the worst problems. lmtp_user_concurrency_limit may also be helpful. Solution: Operators should update to 2.3.15 or later version.

1 0

Pigeonhole v0.5.15 released
by Timo Sirainen 21 Jun '21

21 Jun '21

Hi, Pigeonhole release for Dovecot v2.3.15. One thing we noticed a bit before release is that if you're using imap_sieve_filter plugin, the IMAP FILTER command may trigger the new excessive resource usage check since it can be processing many messages rapidly. You may want to prevent this with protocol imap { sieve_max_cpu_time=0 } https://pigeonhole.dovecot.org/releases/2.3/dovecot-2.3-pigeonhole-0.5.15.t… <https://pigeonhole.dovecot.org/releases/2.3/dovecot-2.3-pigeonhole-0.5.15.t…> https://pigeonhole.dovecot.org/releases/2.3/dovecot-2.3-pigeonhole-0.5.15.t… <https://pigeonhole.dovecot.org/releases/2.3/dovecot-2.3-pigeonhole-0.5.15.t…> Binary packages in https://repo.dovecot.org/ <https://repo.dovecot.org/> Docker images in https://hub.docker.com/r/dovecot/dovecot <https://hub.docker.com/r/dovecot/dovecot> * CVE-2020-28200: Sieve interpreter is not protected against abusive scripts that claim excessive resource usage. Fixed by limiting the user CPU time per single script execution and cumulatively over several script runs within a configurable timeout period. Sufficiently large CPU time usage is summed in the Sieve script binary and execution is blocked when the sum exceeds the limit within that time. The block is lifted when the script is updated after the resource usage times out. * Disconnection log messages are now more standardized across services. They also always now start with "Disconnected" prefix. - managesieve: Commands pipelined together with and just after the authenticate command cause these commands to be executed twice.

1 0

error: "The certificate is empty"
by A. Schulze 18 Jun '21

18 Jun '21

Hello, on a farm of multiple identical dovecot servers I start seeing this error on usual POP3S access on one of many servers: pop3-login: Error: Failed to initialize SSL server context: Can't load SSL certificate (ssl_cert setting): The certificate is empty: I'm running 2.3.14 compiled against openssl-1.1.1k on Debian Buster Looks like it's this code: https://github.com/dovecot/core/blob/a5209c83c3a82386c94d466eec5fea394973e8… called from here: https://github.com/dovecot/core/blob/a5209c83c3a82386c94d466eec5fea394973e8… To me it /looks/ like a resource problem. The farm handle a million pop3 sessions per hour while only 50k (5%) are using TLS. The farm is up and running since ~2 weeks. When started, the automatic deployment *did* check that pop3s was working well. Also today on all farmservers the certificate file is valid, contain expected content. the server is currently offline but not restarted to allow further investigation. the setup is quite normal just checked over all Farmservers: - doveconf | grep ssl | sha256sum - sha256sum $( doveconf | grep 'ssl_cert = <' | awk -F\< '{ print $2 }' ) the output is identical. Any idea is appreciated ... Andreas

1 0

Maildir to Mdbox and folder structure after the conversion
by Marco Usai 18 Jun '21

18 Jun '21

Using the dsync command I've converted a Dovecot mail folder from Maildir to Mdbox format. (see https://dovecot.org/pipermail/dovecot/2021-June/122304.html) The folder resulting from the conversion (see https://pastebin.com/6U4CDTQi ), however, has a completely different directory structure from the one used by the destination server where it will be transferred (see https://pastebin.com/nMEvqmqp ) What do I have to do to make the folder obtained after the conversion have a directory structure identical to the one used by the destination server ? Thank You.

3 4

Empty response with userFile from doveadm HTTP API
by lab＠403.sk 18 Jun '21

18 Jun '21

Hi, I must be doing something terribly wrong, but I am not able to get a non empty response from doveadm HTTP API when using userFile parameter. E. g. in getQuota or search command. Single user or wildcard working as expected. ./doveadm_cli.py --apikey $key --apiurl http://localhost:8180/doveadm/v1 (doveadm) quotaGet userFile=/tmp/f [] Results: 0 cat /tmp/f box1(a)domain.tld box2(a)domain.tld Result with plain cURL is exactly the same. curl -X POST http://localhost:8180/doveadm/v1 -H "Content-Type: application/json" -H "Authorization: X-Dovecot-API xxx" -d '[["quotaGet",{"userFile":"/tmp/f"},"tag1"]]' [["doveadmResponse",[],"tag1"]] Doveadm binary has no problem of reading that file. In a debug log I can see request finishes after "Handling LIST request" and does not jump to "Handling USER request" as in doveadm (binary) case. Am I missing something? dovecot: doveadm(::1): Executing command quota get dovecot: doveadm: Debug: auth-master: userdb list: Started listing users (user_mask=*) dovecot: doveadm: Debug: auth-master: conn unix:/var/run/dovecot/auth-userdb: Connecting dovecot: doveadm: Debug: auth-master: conn unix:/var/run/dovecot/auth-userdb (pid=13811,uid=0): Client connected (fd=8) dovecot: doveadm(::1): Debug: auth-master: userdb list: Finished listing users dovecot: doveadm(::1): Debug: auth-master: conn unix:/var/run/dovecot/auth-userdb (pid=13811,uid=0): Disconnected: Connection closed (fd=8) dovecot: auth: Debug: master in: LIST#0111#011user=* dovecot: doveadm(::1): doveadm: ::1 - - "POST /doveadm/v1 HTTP/1.1" 200 77 "http://localhost:8180/doveadm/v1" "python-requests/2.6.0 CPython/2.7.5" dovecot: auth-worker(13875): Debug: Loading modules from directory: /usr/lib64/dovecot/auth dovecot: auth-worker(13875): Debug: Module loaded: /usr/lib64/dovecot/auth/lib20_auth_var_expand_crypt.so dovecot: auth-worker(13875): Debug: Module loaded: /usr/lib64/dovecot/auth/libdriver_mysql.so dovecot: auth-worker(13875): Debug: Module loaded: /usr/lib64/dovecot/auth/libdriver_sqlite.so dovecot: auth-worker(13875): Debug: conn unix:auth-worker (pid=13839,uid=97): Server accepted connection (fd=15) dovecot: auth-worker(13875): Debug: conn unix:auth-worker (pid=13839,uid=97): Sending version handshake dovecot: auth-worker(13875): Debug: conn unix:auth-worker (pid=13839,uid=97): auth-worker<1>: Handling LIST request dovecot: auth-worker(13875): Debug: conn unix:auth-worker (pid=13839,uid=97): auth-worker<1>: sql(*): Performing userdb lookup dovecot: auth-worker(13875): Debug: conn unix:auth-worker (pid=13839,uid=97): auth-worker<1>: sql(*): SELECT email AS user FROM mailbox WHERE active=1 dovecot: auth-worker(13875): Debug: conn unix:auth-worker (pid=13839,uid=97): auth-worker<1>: sql(*): Finished userdb lookup dovecot: auth-worker(13875): Debug: conn unix:auth-worker (pid=13839,uid=97): auth-worker<1>: Finished doveconf -n # 2.3.14 (cee3cbc0d): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.14 (1b5c82b2) # OS: Linux 3.10.0-862.2.3.el7.x86_64 x86_64 CentOS Linux release 7.5.1804 (Core) # Hostname: xxx auth_debug = yes auth_mechanisms = plain login cram-md5 auth_verbose = yes default_client_limit = 6000 default_process_limit = 512 disable_plaintext_auth = no doveadm_api_key = # hidden, use -P to show it mail_debug = yes mail_home = /h/v/%d/%n mail_location = maildir:~/Maildir mail_plugins = quota managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date index ihave duplicate mime foreverypart extracttext mbox_write_locks = fcntl namespace inbox { inbox = yes list = yes location = mailbox "Deleted Items" { special_use = \Trash } mailbox Drafts { special_use = \Drafts } mailbox Junk { special_use = \Junk } mailbox Sent { special_use = \Sent } mailbox "Sent Items" { special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Spam { special_use = \Junk } mailbox Trash { special_use = \Trash } prefix = type = private } passdb { args = /etc/dovecot/local-sql.conf driver = sql } plugin { quota = maildir quota_grace = 10M quota_rule2 = Kos:storage=+100M quota_rule3 = Trash:storage=+100M quota_rule4 = Deleted Messages:storage=+100M quota_status_nouser = DUNNO quota_status_overquota = 552 5.2.2 Mailbox is full quota_status_success = DUNNO sieve = file:~/sieve;active=~/.dovecot.sieve } service auth-worker { idle_kill = 30 secs } service auth { unix_listener /var/spool/postfix/private/auth { group = mail mode = 0660 user = postfix } unix_listener auth-userdb { mode = 0600 user = vmail } } service doveadm { client_limit = 1 inet_listener http { address = localhost port = 8180 } process_min_avail = 1 unix_listener doveadm-server { mode = 0600 user = vmail } user = vmail } service imap-login { process_limit = 4096 process_min_avail = 10 service_count = 1 } service imap { process_limit = 4096 } service lmtp { process_min_avail = 5 unix_listener /var/spool/postfix/private/dovecot-lmtp { group = postfix mode = 0600 user = postfix } user = vmail } service pop3-login { client_limit = 2048 } service quota-status { client_limit = 1 executable = quota-status -p postfix process_min_avail = 5 unix_listener /var/spool/postfix/private/dovecot-quota-status { group = postfix mode = 0600 user = postfix } user = vmail } ssl_ca = </etc/pki/tls/cert.pem ssl_cert = </etc/pki/o/default.pem ssl_cipher_list = HIGH:!aNULL:!SSLv2:!ADH:!EXP:!eNULL:!RC4:!MEDIUM:!LOW ssl_dh = # hidden, use -P to show it ssl_key = # hidden, use -P to show it ssl_prefer_server_ciphers = yes userdb { driver = prefetch } userdb { args = /etc/dovecot/local-sql.conf driver = sql } verbose_proctitle = yes protocol lmtp { mail_plugins = quota sieve } protocol imap { mail_max_userip_connections = 50 mail_plugins = quota imap_quota } Kind regards, Libor

1 0

Question Regarding The 'poolp' Guide On How To Deploy A Mail Server's Last Portion Regarding Dovecot With 'sieve' Scripts
by Samuel Banya 18 Jun '21

18 Jun '21

Hello everyone, I've been following the "poolp" guide on how to deploy an email server on OpenBSD: - https://poolp.org/posts/2019-09-14/setting-up-a-mail-server-with-opensmtpd-… I'm currently at the very end of the guide in which he is using sieve with Dovecot to do some final filtering. The unfortunate thing is that when I run these two commands in the '/usr/local/lib/dovecot/sieve' directory: sievec report-ham.sieve sievec report-spam.sieve I'm getting the following error: # sievec report-ham.sieve report-ham: line 1: error: require command: unknown Sieve capability `vnd.dovecot.pipe'. report-ham: line 1: error: require command: unknown Sieve capability `imapsieve'. report-ham: line 15: error: unknown command 'pipe' (only reported once at first occurrence). report-ham: error: validation failed. sievec(root): Fatal: failed to compile sieve script 'report-ham.sieve' # sievec report-spam.sieve report-spam: line 1: error: require command: unknown Sieve capability `vnd.dovecot.pipe'. report-spam: line 1: error: require command: unknown Sieve capability `imapsieve'. report-spam: line 7: error: unknown command 'pipe' (only reported once at first occurrence). report-spam: error: validation failed. sievec(root): Fatal: failed to compile sieve script 'report-spam.sieve' What's interesting is that this same post has the same exact error, and I tried his workaround which did NOT work unfortunately: - http://dovecot.2317879.n4.nabble.com/sieve-compile-error-td70414.html This is what was present BEFORE my changes in ' plugin { sieve_plugins = sieve_imapsieve sieve_extprograms sieve_global_extensions = +vnd.dovecot.pipe +vnd.dovecot.environment imapsieve_mailbox1_name = Junk imapsieve_mailbox1_causes = COPY APPEND imapsieve_mailbox1_before = file:/usr/local/lib/dovecot/sieve/report-spam.sieve imapsieve_mailbox2_name = * imapsieve_mailbox2_from = Junk imapsieve_mailbox2_causes = COPY imapsieve_mailbox2_before = file:/usr/local/lib/dovecot/sieve/report-ham.sieve imapsieve_mailbox3_name = Inbox imapsieve_mailbox3_causes = APPEND imapsieve_mailbox3_before = file:/usr/local/lib/dovecot/sieve/report-ham.sieve sieve_pipe_bin_dir = /usr/local/lib/dovecot/sieve } This is what was present AFTER my changes in '/etc/dovecot/conf.d/90-plugin.conf' (aka I followed this post's workaround http://dovecot.2317879.n4.nabble.com/sieve-compile-error-td70414.html) plugin { sieve_plugins = sieve_imapsieve sieve_extprograms sieve_global_extensions = +vnd.dovecot.environment +vnd.dovecot.debug +vnd.dovecot.pipe imapsieve_mailbox1_name = Junk imapsieve_mailbox1_causes = COPY APPEND imapsieve_mailbox1_before = file:/usr/local/lib/dovecot/sieve/report-spam.sieve imapsieve_mailbox2_name = * imapsieve_mailbox2_from = Junk imapsieve_mailbox2_causes = COPY imapsieve_mailbox2_before = file:/usr/local/lib/dovecot/sieve/report-ham.sieve imapsieve_mailbox3_name = Inbox imapsieve_mailbox3_causes = APPEND imapsieve_mailbox3_before = file:/usr/local/lib/dovecot/sieve/report-ham.sieve sieve_pipe_bin_dir = /usr/local/lib/dovecot/sieve } Any ideas on what I can do? Please let me know if this is better suited for the OpenSMTPD mailing list instead though.

1 0

Multiple non-plaintext mechanisms using multiple passdbs.
by Jesús Ángel del Pozo Domínguez 17 Jun '21

17 Jun '21

Hi there, Although I have set up TLS in my Dovecot installation, I would like to also set up some non-plaintext authentication mechanism, specifically CRAM-MD5 and SCRAM-SHA-1. As I read in the documents, "The problem with non-plaintext auth mechanisms is that the password must be stored either in plaintext, or using a mechanism-specific scheme that’s incompatible with all other non-plaintext mechanisms". I will not be storing the user's passwords in plaintext, so I will have to use different mechanism-specific hash schemes. I was wondering whether it would be possible to have several auth databases, one for each non-plaintext mechanism. Well, in reality, I will have just one database with multiple hashes: SHA512-CRYPT, CRAM-MD5 and SCRAM-SHA-1 but then I am going to set up three different passdb instances in dovecot, each one with its own SQL configuration. For example: passdb { driver = sql args = /etc/dovecot/dovecot-sql-plain.conf.ext } passdb { driver = sql args = /etc/dovecot/dovecot-sql-cram-md5.conf.ext } passdb { driver = sql args = /etc/dovecot/dovecot-sql-scram-sha-1.conf.ext } Most users would use TLS and PLAIN as authentication mechanism so the last two password databases will not be used at all. However, those users using CRAM-MD5 or SCRAM-SHA-1 would try the other databases. My users table would be somewhat like this: CREATE TABLE users ( username VARCHAR(128) NOT NULL, domain VARCHAR(128) NOT NULL, password VARCHAR(77) NOT NULL, password_cram_md5 VARCHAR(74) NOT NULL, password_scram_sha_1 VARCHAR(100) NOT NULL, home VARCHAR(255) NOT NULL, uid INTEGER NOT NULL, gid INTEGER NOT NULL, active CHAR(1) DEFAULT 'Y' NOT NULL ); username: foo(a)bar.com domain: bar.com password: {SHA512-CRYPT}$6$Mih5.y90z...CqxX2LxfMJMqoC42NvBK1 password_cram_md5: {CRAM-MD5}a457...2a74f63442e7473e9576cf2e password_scram_sha_1: {SCRAM-SHA-1}4096,4...9AYjadouwXqiqc3UM= Obviously, the SQL query in each dovecot-sql-....ext file would be different. For instance: /etc/dovecot/dovecot-sql-plain.conf.ext default_pass_scheme = SHA512-CRYPT password_query = \ SELECT username, domain, password, home AS userdb_home, uid AS userdb_uid FROM users WHERE username = '%n' AND domain = '%d' /etc/dovecot/dovecot-sql-cram-md5.conf.ext default_pass_scheme = CRAM-MD5 password_query = \ SELECT username, domain, password_cram_md5 AS password, home AS userdb_home, uid AS userdb_uid FROM users WHERE username = '%n' AND domain = '%d' /etc/dovecot/dovecot-sql-scram-sha-1.conf.ext default_pass_scheme = SCRAM-SHA-1 password_query = \ SELECT username, domain, password_scram_sha_1 AS password, home AS userdb_home, uid AS userdb_uid FROM users WHERE username = '%n' AND domain = '%d' Could you please tell me whether this set up would work? Do you believe is worth the complexity or maybe I had better keep it more simple and use just PLAIN auth with TLS? Cheers, Jesús Ángel

1 0

Mapping usernames used for authentication to UNIX usernames
by Frank Volf 17 Jun '21

17 Jun '21

Hi, I'm looking for some advice or pointers how to best solve a small problem that I have. I have no doubt that this can be done in dovecot, but I'm struggling to find the easiest way to implement it. First of all, what I have: I have a relative small dovecot setup for a dozen domains, and about 50 users in total. All users use IMAP to retrieve mail, and SMTP submission protocol to submit email. Because of the small size, every user has its own UNIX account, authentication is done using PAM and mail is stored in a Maildir folder in their home directory. Works perfectly! There is one minor inconvenience. When a new mail client is configured, users (often guided by the auto config generator of the mail client) tend to use their email address as the username to authenticate instead of their UNIX account name, which fails of course. Would it be possible to configure something that will map an email address to the UNIX account name and use the account name for authentication and obtaining the related information (uid, gid, home dir)? I do have two concerns: 1) I do not want to break existing mail configurations, so authentication with the UNIX username should still be possible. 2) I cannot do a simple reg. exp for the translation because every email domain has e.g. an info(a)domain.com mailbox, and I do not want them all to go to UNIX user "info". As said, I would appreciate any advice on how this can be configured the easiest. Thanks in advance. Kind regards, Frank

4 3

Re: N-way replication, multiple masters
by Henry 17 Jun '21

17 Jun '21

1 GB data per day is very little volume ,I think dovecot replication, rsync also suitable. Hi Mail replication – honestly, I don’t have any hard metrics for that. I’m anticipating its less than 1 GB per day. Link speed – being AWS inter AZ its 100Mbps-1GBps. I’m conscious if I go inter region the strategy may need to change. Thanks Raymond Raymond Sellars (<raymond.sellars(a)orionhealth.com>) 在 2021年6月17日星期四上午11:30:23 [GMT+8] 寫道： #yiv6469694122 #yiv6469694122 -- _filtered {} _filtered {} _filtered {} _filtered {} _filtered {}#yiv6469694122 #yiv6469694122 p.yiv6469694122MsoNormal, #yiv6469694122 li.yiv6469694122MsoNormal, #yiv6469694122 div.yiv6469694122MsoNormal {margin:0cm;font-size:11.0pt;font-family:sans-serif;}#yiv6469694122 a:link, #yiv6469694122 span.yiv6469694122MsoHyperlink {color:blue;text-decoration:underline;}#yiv6469694122 span.yiv6469694122EmailStyle19 {font-family:sans-serif;color:#1F497D;font-weight:normal;font-style:normal;}#yiv6469694122 .yiv6469694122MsoChpDefault {font-size:10.0pt;} _filtered {}#yiv6469694122 div.yiv6469694122WordSection1 {}#yiv6469694122 Hi Mail replication – honestly, I don’t have any hard metrics for that. I’m anticipating its less than 1 GB per day. Link speed – being AWS inter AZ its 100Mbps-1GBps. I’m conscious if I go inter region the strategy may need to change. Thanks Raymond From: Henry <hl1723(a)yahoo.com.hk> Sent: Thursday, 17 June 2021 3:20 PM To: Raymond Sellars <raymond.sellars(a)orionhealth.com> Subject: Re: N-way replication, multiple masters How many data for mail replication ? and the link speed? Raymond Sellars (<raymond.sellars(a)orionhealth.com>) 在 2021年6月17日星期四上午11:10:23 [GMT+8] 寫道：

1 0

N-way replication, multiple masters
by Raymond Sellars 17 Jun '21

17 Jun '21

Hi Looking for some guidance on how to setup a dovecot cluster with more than 2 servers. Ideally as multiple masters so I don't have the complexity of back recovery/synchronisation in failover situations. And I can utilised upstream load balancers (director or other) to automatically move between available nodes. Current pattern is: High availability at one site (AWS availability zone) with two active servers behind dovecot directors and an AWS network load balancer in front of the directors. A third dovecot server as a disaster recovery instance (another availability zone or region), with ideally real time and bidirectional replication. Behind a different network and NLB access path. Dovecot --version = 2.3.14 Centos 7 Previously for the HA pair we utilised NFS but the AWS EFS equivalent doesn't perform ( very high latency and NFS meta data caching required). And then for DR we utilised the dovecot replication. 2 way so I have automated recovery and could do active active testing/verification as required with no down time. This help verify recovery pathways. https://doc.dovecot.org/configuration_manual/replication/# - reading the documentation is seems clear that replication only supports a PAIR of masters. Any ideas on how I can add in a 3rd replication node? Two pairs? I'm happy to utilise a star pattern. HA 1 <-> HA2, HA 1 <-> DR. Not possible? Can I run more than one replicator? Or should I utilise doveadm sync via cron jobs and 2-way sync. Any thoughts, suggestions most welcome. How are others achieving > 2 clusters for dovecot servers supporting the same domain? Most of this is for availability rather than purely performance scaling. Thanks Raymond

1 0

working locally not externally, how to check what failed?
by Voytek Eymont 17 Jun '21

17 Jun '21

this morning I noticed not getting any email on remote to server mail client, though, in webmail/squirellmail on mail host there were new emails restarting with doveadm stop/dovecot 'fixed it' what could've gone wrong, what to look for in the logs ? thanks for any pointers long running dovecot/postfix/mysql setup dovecot --version 2.3.14 (cee3cbc0d)

1 0

Piping to doveadm pw
by Kevin N. 16 Jun '21

16 Jun '21

Hello everybody, I am using 'doveadm pw' from inside a bash script to generate the salted hash for a user provided password. I call it like: doveadm pw -s SHA256-CRYPT -u $user -p $password Is there any possible way to use piping (so it won't show up in ps for example) to pass the username and password to 'doveadm pw' instead of using arguments? Dovecot version: 2.3.14 Many thanks, Kevin

3 4

LMTP with hardlinks ?
by Vladislav Kurz 16 Jun '21

16 Jun '21

Hello, I'm looking for deduplication of mails via hardlinks during delivery. I.e. a mail that is sent to multiple recipients (to, cc, bcc) should be stored only once. I did some search and found only some non-complete information. dovecot-lda has a "-p path" option that does the delivery using symlinks if possible (i.e. same uid/gid and same filesystem). This is working by hand, but could not find any hints how to use this with postfix. Found only suggestion of a wrapper, that was probably never implemented - in this thread: https://dovecot.org/pipermail/dovecot/2008-June/031158.html In this message: https://dovecot.org/list/dovecot/2013-February/088540.html there is statement that: LMTP always delivers the mail to the first user. Then it tries to copy the first mail to the second user, because in some setups this can be done using hard links. I was not able to get this in my setup, and I'd like to know if this statement is really true. I have all mail in /var/vmail, all owned by vmail user, but still mail delivered to multiple users is duplicated. If this is really supposed to make hardlinks (which would be great), is there any way to debug it? E.g. see if the hardlink was attempted but failed for some reason, or if the message was delivered in the same LMTP session ? -- Best Regards Vladislav Kurz

1 1

lda to lmtp
by Laura Steynes 14 Jun '21

14 Jun '21

Hi, Although dovecot-lda serves us fine, we only average 8k messages an hour, peaking at 11k, over 4 machines (mostly for redundancy, we've run this fine on just 1 machine, but sometimes clamav makes things get upset, so we added some more especially since we are growing rapidly, we decided to see if lmtp would be of benefit, so far, we cant tell any difference, I guess it is only 120-130 messages a minute, maybe if we were doing 200 a minute we might see gain? The question is with lda we used postfix settings destination_recipient_limit=1, we have not added this with lmtp,is this needed?

6 9

sieve not updating headers?
by Daniel J. Luke 13 Jun '21

13 Jun '21

Hello, I've recently converted from using procmail as an lda to using lmtp+sieve (and it's overall great). My setup is currently doing post-queue spamassassin to pickup user rules (and to be substantially similar to how it worked before). It mostly works, but I get some mail forwarded from another host that also runs spamassassin, so the mail comes with X-Spam headers already set. I can see that my sieve_before script successfully sends the message off to spamc/spamd - however the message ends up in my mailbox with only the pre-existing X-Spam headers (I had expected them to be replaced or to see duplicates). I thought I'd try to just strip them from incoming mail so I used deleteheader, I got a trace saying it matches and deletes the headers, then sends the mail off to spamc/spamd - but the message that ends up in my mailbox has the headers that were presumably deleted. My before.sieve looks like this: require ["vnd.dovecot.filter","editheader"]; # rule:[spamfilter] if size :under 10485760 { deleteheader :matches "X-Spam-Flag" "*"; deleteheader :matches "X-Spam-Status" "*"; deleteheader :matches "X-Spam-Level" "*"; deleteheader :matches "X-Spam-Checker-Version" "*"; filter "spamc" ["-s","10485760","-U","/var/run/spamd.sock"]; } Trace file says: ## Started executing script 'before' 6: size :under test 6: comparing message size 4197 6: with lower limit 10485760 6: jump if result is false 6: not jumping 11: deleteheader command 11: deleting matching occurrences of header `X-Spam-Flag' 11: header `X-Spam-Flag' not found 12: deleteheader command 12: deleting matching occurrences of header `X-Spam-Status' 12: starting `:matches' match with `i;ascii-casemap' comparator: 12: matching value `No, score=-0.2 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,DKIM_.. .' 12: with key `*' => 1 12: deleting header with value `No, score=-0.2 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALI D_AU,DKIM_VALID_EF,FREEMAIL_FROM,HTML_MESSAGE, RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS autolearn=ham au tolearn_force=no version=3.4.2' 12: finishing match with result: matched 13: deleteheader command 13: deleting matching occurrences of header `X-Spam-Level' 13: header `X-Spam-Level' not found 14: deleteheader command 14: deleting matching occurrences of header `X-Spam-Checker-Version' 14: starting `:matches' match with `i;ascii-casemap' comparator: 14: matching value `SpamAssassin 3.4.2 (2018-09-13) on braeburn.macports.org' 14: with key `*' => 1 14: deleting header with value `SpamAssassin 3.4.2 (2018-09-13) on braeburn.macports.org' 14: finishing match with result: matched 16: filter action 16: execute program `spamc' 16: executed program successfully 16: changed message ## Finished executing script 'before' It then falls through my personal sieve filter and hits the implicit keep at the end and ends up in my inbox - with the original headers. So, two questions: 1. What am I missing? 2. Is there a way to match any X-Spam-* header? (when I tried deleteheader :matches "X-Spam*" it didn't match anything). Thanks. -- Daniel J. Luke

4 6

Use of Sieve with Dovecot not possible cause of error
by DarkFish82 12 Jun '21

12 Jun '21

**What happened?** The description of the problem concerns the Thunderbird but also the stand alone version and other sieve editors. I would like to edit Sieve via the plugin/program. My mail account works without problems and can also send/receive. Creating a new account is possible without any problems. As soon as I click on "Connect", the loading bar is permanently there and nothing happens. I have activated debugging in the settings, but I don't know where it is saved. if someone tells me, I can submit the required log later. **Settings** Settings from Sieve: Server imap.xxxxxx.eu: 4190 (Secured connection) Username my(a)fancydomain.eu **Logs** dovecot-mailcow_1 | May 9 02:47:16 04888203e1b5 dovecot: managesieve-login: Disconnected (no auth attempts in 0 secs): user=<>, rip=92.123.123.123, lip=123.123.123.123, TLS handshaking: SSL_accept() failed: error:14094412:SSL routines:ssl3_read_bytes:sslv3 alert bad certificate: SSL alert number 42 **What i tried?** 1. gnutls-cli --starttls -p 4190 imap.xxxxxx.eu Output: `Processed 129 CA certificate(s). Resolving "imap.xxxxxxxxx.eu:4190"... Connecting to "2a03:4000:34:522:981b:xxxx:xxxx:xxxx:4190"... Simple Client Mode: "IMPLEMENTATION" "Dovecot Pigeonhole" "SIEVE" "fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date index ihave duplicate mime foreverypart extracttext vacation-seconds editheader imapflags notify imapsieve vnd.dovecot.imapsieve" "NOTIFY" "mailto" "SASL" "" "STARTTLS" "VERSION" "1.0" OK "Dovecot ready."` 2. telnet xxx.xxx.xxx.xxx 4190 output: Connected to xxx.xxx.xxx.xxx. Escape character is "^]". "IMPLEMENTATION" "Dovecot Pigeonhole" "SIEVE" "fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date index ihave duplicate mime foreverypart extracttext vacation-seconds editheader imapflags notify imapsieve vnd.dovecot.imapsieve" "NOTIFY" "mailto" "SASL" "" "STARTTLS" "VERSION" "1.0" OK "Dovecot ready." 3. Added in dovecot.conf in "service managesieve-login" "ssl = no" and after that "ssl = true" but also not working. dovecot config: service managesieve-login { inet_listener sieve { port = 4190 ssl = no } inet_listener sieve_haproxy { port = 14190 haproxy = yes } service_count = 1 process_min_avail = 2 vsz_limit = 1G } **OS/Software Informations** Client Thunderbird: OS: Windows 10 Sieve Version: 0.5.3 Thunderbird Version: 78.11.0 Client Standalone: OS: Windows 10 Sieve Version: 0.5.2 Mailcow: OS: Ubuntu 20.04 Mailcow Versions: acme-mailcow (mailcow/acme:1.78) clamd-mailcow (mailcow/clamd:1.39) dockerapi-mailcow (mailcow/dockerapi:1.38) dovecot-mailcow (mailcow/dovecot:1.145) ejabberd-mailcow (mailcow/ejabberd:1.5) ipv6nat-mailcow (robbertkl/ipv6nat) memcached-mailcow (memcached:alpine) mysql-mailcow (mariadb:10.5) netfilter-mailcow (mailcow/netfilter:1.41) nginx-mailcow (nginx:mainline-alpine) olefy-mailcow (mailcow/olefy:1.7) php-fpm-mailcow (mailcow/phpfpm:1.74) postfix-mailcow (mailcow/postfix:1.61) redis-mailcow (redis:5-alpine) rspamd-mailcow (mailcow/rspamd:1.76) sogo-mailcow (mailcow/sogo:1.98) solr-mailcow (mailcow/solr:1.7) unbound-mailcow (mailcow/unbound:1.13) watchdog-mailcow (mailcow/watchdog:1.91) -- Sent from: http://dovecot.2317879.n4.nabble.com/

1 0

Shared Mailboxes in Dovecot Cluster & director configuration
by Vincent Brillault 10 Jun '21

10 Jun '21

Hi! I've been trying to set a shared namespace on a test dovecot cluster and I've had some weird issues. I'm not sure if this is a feature or a bug, so please advice. As some features (like acl_ignore_namespace) are only in the upcoming 2.3.15, after some initial debugging, I've update the system I'm using to the master branches (df1b4b8750fdb87d38ac9accb8a1dea02ac3ce2e for core and 7090e62564bcb7bff7efc89bd2a42b1d32d9e475 for pigeonhole), but it didn't change the initial issues I was having. I've been following https://doc.dovecot.org/configuration_manual/shared_mailboxes/cluster_setup/ and linked documentations to set up the cluster. You'll find at the end of the mail the parts of the configuration that seems to be relevant. The issues I've had was with the `You’ll need to setup master user logins to work for all the users.` and `imapc_master_user` (for which the bullet points recommend to use `%{userdb:sharing_user}` but is then set to `%u` in the example. For the sake of the tests, I'm using one director and one backend. On this installation: - user1 shared the folder 'Junk' with user2 - after logging as user2, I run `a2 SELECT shared/user1/Junk` Initially on the director, I had (excluding other, unrelated configuration): ``` # Connection back from backends for shared mailbox access passdb { args = password=XXXX allow_nets=${IPs of backend} driver = static master = yes mechanisms = plain result_success = continue } ``` However, this lead to login failures on the director as the backend was logging directly as user1, without master user set! After further debugging, I now have on the director: ``` # Connection back from backends for shared mailbox access passdb { args = password=XXXX allow_nets=${IPs of backend} driver = static master = yes mechanisms = plain result_success = continue } passdb { args = password=XXXX allow_nets=${IPs of backend} driver = static mechanisms = plain result_success = continue } ``` And this works! Looking at the log, it's not that my `imapc_master_user` is not recognized, just that there are two imapc connections from the backend to the frontend. - The first one logs as user1 directly, with no master user set: ``` ${backend} dovecot[29900]: imap(user2)<29917><Mi/7WD/EgYi8uE1E>: Debug: imapc(${director}:993): Authenticating as user1 ``` - The second connection logs as expected, as user1 with user2 set as the master user: ``` ${backend} dovecot[29900]: imap(user2)<29917><Mi/7WD/EgYi8uE1E>: Debug: imapc(${director}:993): Authenticating as user2 for user user1 ``` Is it normal to have these two connections back to the director? From the documentation, I would have only expected the 2nd one. Going further, if I add a static part to imapc_master_user, like for example `imapc_master_user = X%{userdb:sharing_user}`, the logged authentications become: ``` ${backend} dovecot: imap(user2)<31073><xu94pz/EqYi8uE1E>: Debug: imapc(${director}:993): Authenticating as X for user user1 [...] ${backend} dovecot: imap(user2)<31073><xu94pz/EqYi8uE1E>: Debug: imapc(${director}:993): Authenticating as Xuser2 for user user1 ``` It looks to me that for the first connection, imapc_master_user is resolved with the wrong context, without `userdb:sharing_user` resolving to anything? Thanks in advance, let me know if you need more details. Vincent Brillault PS configuration details (relevant parts of doveconf -n): - Backend: ``` auth_master_user_separator = * imapc_features = fetch-bodystructure fetch-headers rfc822.size search modseq imapc_host = ${director} imapc_master_user = %{userdb:sharing_user} imapc_password = # hidden, use -P to show it imapc_port = 993 imapc_sasl_mechanisms = plain imapc_ssl = imaps imapc_ssl_verify = no mail_plugins = acl zlib virtual fts fts_solr namespace { list = children location = imapc:~/shared/%%u prefix = shared/%%u/ type = shared } namespace Virtual { hidden = yes list = no location = virtual:/etc/dovecot/virtual:INDEX=~/virtual prefix = Virtual/ separator = / subscriptions = no } namespace inbox { inbox = yes location = mailbox "Deleted Items" { auto = subscribe special_use = \Trash } mailbox Drafts { auto = subscribe special_use = \Drafts } mailbox "Sent Items" { auto = subscribe special_use = \Sent } mailbox Spam { auto = create special_use = \Junk } prefix = } passdb { args = password=#hidden_use-P_to_show# allow_nets=${IPs of director} userdb_namespace/shared/disabled=yes driver = static master = yes } passdb { args = password=#hidden_use-P_to_show# allow_nets=${IPs of director} userdb_sharing_user=%u driver = static } plugin { acl = vfile:/etc/dovecot/dovecot-acl acl_ignore_namespace = Virtual/ acl_ignore_namespace2 = shared/* acl_shared_dict = file:/mail/sharing/shared-mailboxes [...] } ``` - Director (final & working version): ``` auth_master_user_separator = * auth_mechanisms = plain login xoauth2 oauthbearer gssapi auth_socket_path = director-userdb passdb { args = /etc/dovecot/passdb-masterusers.conf.ext driver = ldap master = yes mechanisms = plain login result_success = continue } passdb { args = password=#hidden_use-P_to_show# allow_nets=${IPs of backend} driver = static master = yes mechanisms = plain result_success = continue } passdb { args = password=#hidden_use-P_to_show# allow_nets=${IPs of backend} driver = static mechanisms = plain result_success = continue } passdb { args = /etc/dovecot/passdb-oauth2.conf.ext driver = oauth2 mechanisms = xoauth2 oauthbearer result_failure = return-fail result_internalfail = return-fail result_success = continue } passdb { args = /etc/dovecot/passdb-cerndc.conf.ext driver = ldap } ```

2 2

2.3.13 broken submission relay smtp parser
by Tony Hain 09 Jun '21

09 Jun '21

I have a new install of dovecot 2.3.13, along with exim 4.94, in an Azure hosted FreeBSD 12.2 VM. I have been running exim on local hardware with FreeBSD for 15+ years, but dovecot and Azure are a new "learning experience". I am getting an error response in dovecot.log when trying to use the submission relay function, which is apparently new in 2.3... It would appear the parser is either broken or has a character set limitation that no other smtp implementation has. I finally gave up trying to figure out what I might have done wrong in setting up exim and pointed dovecot at mailjet and got the same error. Jun 08 19:39:42 submission(testing(a)dispatch.tndh.net)<89538><lOfAL0zEFNmsOCrh>: Warning: smtp-client: conn in-v3.mailjet.com:587 (104.199.96.85:587) [1]: Received invalid EHLO response line: Unexpected character in EHLO keyword Jun 08 19:39:42 submission(testing(a)dispatch.tndh.net)<89538><lOfAL0zEFNmsOCrh>: Warning: smtp-client: conn in-v3.mailjet.com:587 (104.199.96.85:587) [1]: Received invalid EHLO response line: Unexpected character in EHLO keyword I didn't try the mailjet path with telnet, but I had done that earlier with the local exim server and I can't see any invalid characters, even in the tcpdump pcap file. Jun 08 10:49:42 submission(testing(a)dispatch.tndh.net)<29791><j8NnyETEqV2sOCq3>: Warning: smtp-client: conn 127.0.0.1:58 [1]: Received invalid EHLO response line: Unexpected character in EHLO keyword # telnet localhost 58 Trying 127.0.0.1... Connected to localhost. Escape character is '^]'. 220 secure smtp server ehlo dovecot.tndh.net 250-exim.tndh.net Hello dovecot.tndh.net [127.0.0.1] 250-SIZE 536870912 250-8BITMIME 250-VRFY 250-PIPELINING 250-X_PIPE_CONNECT 250-AUTH CRAM-MD5 250-CHUNKING 250-SMTPUTF8 250 HELP This might be some confusion about starttls on the mailjet path, but if that is true the error message is wrong; and it wouldn't be true for the local exim open smtp port. If it really is smtp, it would be most helpful if the error message actually reported what string it is taking issue with. I have the dovecot-sysreport, but I am not encouraged about sending it when stdout presented: # dovecot-sysreport Gathering configurations ... grep: The -P option is not supportedgrep: The -P option is not supported grep: The -P option is not supported Gathering system informations ... Creating archive ... All done! Please report file dovecot-sysreport-TNDH-mail-1623209001.tar.gz Removing temp files at /tmp/tmp.kphlba44 ... # While dovecot -n stdout presented the line: ssl_key = # hidden, use -P to show it expecting people to put sensitive configuration on a public mail list without knowing what the tool is including is a challenge, but when the tool is errantly using the command line option that is also used for exposing the private data by a related tool, it is even less likely that I want to do that. While the dovecot -n option did hide passwords, it did not hide the username associated with that. I will put dovecot -n (redacted) here, but until I have time to see exactly what the sysreport included, I am not releasing that. # 2.3.13 (89f716dc2): /usr/local/etc/dovecot/dovecot.conf # Pigeonhole version 0.5.13 (cdd19fe3) # OS: FreeBSD 12.2-RELEASE-p4 amd64 ufs # Hostname: TNDH-mail.g4msrgoph2uevil3ys5jvbbpza.jx.internal.cloudapp.net auth_debug = yes auth_debug_passwords = yes auth_verbose = yes debug_log_path = /var/log/dovecot-debug.log disable_plaintext_auth = no first_valid_uid = 220 hostname = dispatch.tndh.net imap_idle_notify_interval = 20 mins info_log_path = /var/log/dovecot-info.log last_valid_uid = 220 log_debug = (event=* AND cat=*) log_path = /var/log/dovecot.log login_greeting = tndh.net Mailer Server Ready ... login_trusted_networks = 127.0.0.1 10.0.0.4 mail_debug = yes mail_location = maildir:/usr/local/var/dovecot/vhosts/%d/%n mail_plugins = mail_log notify notify_status managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date index ihave duplicate mime foreverypart extracttext namespace inbox { inbox = yes location = mailbox Drafts { auto = subscribe special_use = \Drafts } mailbox Junk { auto = subscribe special_use = \Junk } mailbox Sent { auto = subscribe special_use = \Sent } mailbox Trash { auto = subscribe special_use = \Trash } mailbox virtual/Flagged { auto = subscribe special_use = \Flagged } prefix = separator = / type = private } passdb { args = username_format=%n /usr/local/var/dovecot/db/%d/passwd driver = passwd-file } plugin { expire = Trash mail_home = /usr/local/var/dovecot/vhosts/%d/%n mail_log_events = delete undelete expunge copy mailbox_delete mailbox_rename mail_log_fields = uid box msgid size recipient_delimiter = + sieve = /usr/local/var/dovecot/vhosts/%d/%n/sieve/.dovecot.sieve sieve_after = /usr/local/var/dovecot/vhosts/%d/%n/sieve/sieve-after.d sieve_before = /usr/local/var/dovecot/vhosts/%d/%n/sieve/sieve-before.d sieve_dir = /usr/local/var/dovecot/vhosts/%d/%n/sieve sieve_global_path = /usr/local/var/dovecot/vhosts/sieve/default.sieve } pop3_client_workarounds = outlook-no-nuls oe-ns-eoh protocols = imap pop3 lmtp submission service auth-worker { user = vmail } service imap-login { inet_listener imap { port = 143 } inet_listener imaps { port = 993 ssl = yes } } service stats { unix_listener stats-writer { mode = 0666 } } service submission-login { inet_listener submission { port = 465 ssl = yes } } ssl_cert = </usr/local/etc/dovecot/ssl/certs/dovecot.pem ssl_key = # hidden, use -P to show it submission_relay_host = in-v3.mailjet.com submission_relay_password = # hidden, use -P to show it submission_relay_port = 587 submission_relay_rawlog_dir = /var/log submission_relay_ssl = starttls submission_relay_user = **-as-if-I-want-this-on-a-public-list-** userdb { args = username_format=%n /usr/local/var/dovecot/db/%d/passwd driver = passwd-file } verbose_ssl = yes protocol lmtp { mail_fsync = optimized mail_plugins = mail_log notify notify_status sieve } protocol imap { mail_max_userip_connections = 10 mail_plugins = mail_log notify notify_status imap_sieve } protocol pop3 { mail_max_userip_connections = 10 mail_plugins = mail_log notify notify_status } protocol lda { mail_fsync = optimized mail_plugins = mail_log notify notify_status sieve }

3 5

Dovecot Subfolder Always Uses dot separator with mdbox
by Steven Smith 09 Jun '21

09 Jun '21

I’m trying to configure dovecot to use mailbox subfolders that look like both foo/bar on the IMAP client and the filesystem. But the subfolders created all look like foo.bar, not foo/bar with a proper nesting structure. This also happens when the folder ‘bar’ is moved into the folder ‘foo’—A new folder `foo.bar’ is created. I believe that i’m following the configuration rules at https://wiki.dovecot.org/MailboxFormat/Maildir#Maildir_and_filesystems and https://wiki.dovecot.org/MailLocation/Maildir. This issue happens whether I set separator to its default, ‘.’, or ‘/’: > mail_location = mdbox:/private/var/mail/tld.hostname.mail/%Ln/mdbox:LAYOUT=fs > namespace inbox { > … > separator = / > … > } The IMAP client is macOS Mail.app version 14.0. I’d greatly appreciate any help or pointers to fix this configuration issue. dovecot -n > # 2.3.13 (): /opt/local/etc/dovecot/dovecot.conf > # Pigeonhole version 0.5.13 () > # OS: Darwin 20.4.0 x86_64 apfs > # Hostname: mail.hostname.tld > aps_topic = com.apple.mail.XServer.ffffffff-ffff-fff-ffffffffff > auth_cache_size = 10 M > auth_gssapi_hostname = $ALL > auth_krb5_keytab = /opt/local/etc/dovecot/imap.keytab > auth_mechanisms = plain gssapi > auth_realms =mail.hostname.tld > auth_socket_path = /opt/local/var/run/dovecot/auth-userdb > auth_username_format = %Ln > debug_log_path = /opt/local/var/log/mail/mail-debug.log > disable_plaintext_auth = no > first_valid_gid = 6 > first_valid_uid = 6 > imap_id_log = * > imap_id_send = "name" * "version" * > imap_idle_notify_interval = 29 mins > imap_urlauth_submit_user = submit > info_log_path = /opt/local/var/log/mail/mail-info.log > last_valid_gid = 100 > lda_mailbox_autocreate = yes > log_path = /opt/local/var/log/mail/mail-err.log > login_log_format_elements = user=<%u> method=%m rip=%r lip=%l mpid=%e %c > mail_access_groups = mail > mail_attachment_dir = /private/var/mail/tld.hostname.mail/attachments > mail_attachment_fs = sis posix:mode=0666 > mail_gid = mail > mail_home = /private/var/mail/tld.hostname.mail > mail_location = mdbox:/private/var/mail/tld.hostname.mail/%Ln/mdbox:LAYOUT=fs > mail_log_prefix = "%s(pid %p user %u): " > mail_plugins = quota zlib acl fts fts_solr fts_lucene > mail_privileged_group = mail > mail_uid = _dovecot > managesieve_notify_capability = mailto > managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date index ihave duplicate mime foreverypart extracttext imapsieve vnd.dovecot.imapsieve > mdbox_rotate_size = 200 M > namespace inbox { > inbox = yes > location = > mailbox Archive { > auto = subscribe > special_use = \Archive > } > mailbox Drafts { > auto = subscribe > special_use = \Drafts > } > mailbox Junk { > auto = create > special_use = \Junk > } > mailbox Notspam_train { > auto = create > special_use = \Junk > } > mailbox Sent { > auto = subscribe > special_use = \Sent > } > mailbox "Sent Messages" { > special_use = \Sent > } > mailbox Spam_train { > auto = create > special_use = \Junk > } > mailbox Trash { > auto = create > special_use = \Trash > } > prefix = > separator = / > } > passdb { > driver = pam > name = pam > } > plugin { > fts = solr > fts_autoindex = yes > fts_autoindex_exclude = \Junk > fts_solr = url=http://127.0.0.1:8983/solr/dovecot/ > imapsieve_mailbox1_before = file:/opt/local/etc/dovecot/sieve/report-spam.sieve > imapsieve_mailbox1_causes = COPY APPEND > imapsieve_mailbox1_name = Spam_train > imapsieve_mailbox2_before = file:/opt/local/etc/dovecot/sieve/report-ham.sieve > imapsieve_mailbox2_causes = COPY APPEND > imapsieve_mailbox2_name = Notspam_train > mail_log_events = delete undelete expunge copy mailbox_delete mailbox_rename > mail_log_fields = uid box msgid from subject size flags > quota_grace = 10%% > quota_rule = *:storage=16G > quota_rule2 = Trash:storage=+256M > quota_warning = storage=100%% quota-exceeded %u > quota_warning2 = storage=80%% quota-warning %u > recipient_delimiter = + > sieve = /private/var/mail/tld.hostname.mail/rules/%Ln/dovecot.sieve > sieve_after = /opt/local/etc/dovecot/sieve-after.d > sieve_before = /opt/local/etc/dovecot/sieve-before.d > sieve_dir = /private/var/mail/tld.hostname.mail/rules/%Ln/%u > sieve_global_extensions = +vnd.dovecot.pipe +vnd.dovecot.environment > sieve_pipe_bin_dir = /opt/local/etc/dovecot/sieve > sieve_plugins = sieve_imapsieve sieve_extprograms > sieve_quota_max_storage = 50M > } > postmaster_address = postmaster(a)hostname.tld > protocols = imap lmtp sieve > quota_full_tempfail = yes > sendmail_path = /opt/local/sbin/sendmail > service auth-worker { > group = mail > user = root > } > service auth { > extra_groups = _keytabusers > idle_kill = 15 mins > unix_listener /opt/local/var/spool/postfix/private/auth { > group = mail > mode = 0660 > user = _postfix > } > } > service dns-client { > unix_listener dns-client { > mode = 0600 > } > } > service imap-login { > inet_listener imap { > address = 127.0.0.1, ::1 > port = 143 > } > inet_listener imaps { > port = 993 > ssl = yes > } > process_min_avail = 6 > service_count = 0 > vsz_limit = 2 G > } > service imap { > process_limit = 200 > process_min_avail = 6 > } > service lmtp { > unix_listener /opt/local/var/spool/postfix/private/dovecot-lmtp { > group = mail > mode = 0660 > user = _postfix > } > } > ssl = required > ssl_ca = </opt/local/etc/certificates/cert.chain.pem > ssl_cert = </opt/local/etc/certificates/cert.cert.pem > ssl_cipher_list = ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256 > ssl_dh = # hidden, use -P to show it > ssl_key = # hidden, use -P to show it > ssl_min_protocol = TLSv1.2 > ssl_prefer_server_ciphers = yes > userdb { > driver = passwd > name = passwd > } > verbose_proctitle = yes > protocol lda { > mail_fsync = optimized > mail_plugins = quota zlib acl fts fts_solr fts_lucene sieve push_notify > } > protocol imap { > mail_max_userip_connections = 50 > mail_plugins = quota zlib acl fts fts_solr fts_lucene imap_acl imap_quota imap_zlib imap_sieve > } > protocol lmtp { > mail_fsync = optimized > mail_plugins = quota zlib acl fts fts_solr fts_lucene sieve > }

2 3

Correct procedure to convert Maildir format to Mdbox
by Marco Usai 09 Jun '21

09 Jun '21

Hi, I need to migrate mail from a shared hosting that stores mail in the Maildir format to another one that uses the Mdbox format. Both hosts use Dovecot, though I don't know what version, because neither has Dovecot command line/ssh utilities available. So I installed Debian 10.9 + Dovecot-imapd (ver.2.3.4.1 stable), then in "/etc/dovecot/conf.d/10-mail.conf" I changed "mail_location = mbox:~/mail:INBOX=/var/mail/%u" to "mail_location = mdbox:~/mdbox" and "#separator =" to "separator = /" . I moved the contents of the folder containing the mail in Maildir format to ~/Maildir/ and then I ran "dsync -v -u user mirror maildir:~/Maildir/". The only users on the system are root and a limited priviledges user, but on the Debian server I didn't recreate any mail account/user that existed on the source server. The conversion command is executed without showing errors: the resulting ~/mdbox folder has a size of 370 MB while the ~/Maildir/ folder was 456 MB. I would like to know if the procedure I followed is correct and if the absence of errors when the command is executed means that the conversion was successful, or if I need to do some other test/check to make sure the whole conversion process is ok. Thank you.

2 1

Panic -Dsync Replication
by Antonino Sidoti 07 Jun '21

07 Jun '21

Hi, I am seeing this; Jun 07 16:17:22 Warning: lmtp(nino(a)sidoti.id.au)<20211><vJkREfC5vWDzTgAAv/fbcw>: replication(nino(a)sidoti.id.au): Sync failure: Timeout in 2 secs Jun 07 16:17:22 Panic: replicator: data stack: Out of memory when allocating 268435496 bytes Jun 07 16:17:22 Fatal: replicator: master: service(replicator): child 77583 killed with signal 6 (core not dumped - https://dovecot.org/bugreport.html#coredumps) It started when I added the following to my configuration; replication_sync_timeout = 2 If I remove the above line then sync works properly and no errors. # 2.3.14 (cee3cbc0d): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.14 (1b5c82b2) # OS: OpenBSD 6.9 amd64 ffs # Hostname: obsd-mx1.stonyrange.com doveadm_password = # hidden, use -P to show it doveadm_port = 2727 hostname = mx1.stonyrange.com listen = * mail_gid = vmail mail_home = /var/vmail/%d/%n/Home mail_location = maildir:/var/vmail/%d/%n/Maildir mail_plugins = " notify replication" mail_uid = vmail managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date index ihave duplicate mime foreverypart extracttext imapsieve vnd.dovecot.imapsieve namespace inbox { inbox = yes location = mailbox "Deleted Messages" { special_use = \Trash } mailbox Drafts { special_use = \Drafts } mailbox Junk { special_use = \Junk } mailbox Sent { special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Trash { special_use = \Trash } prefix = } passdb { args = scheme=BLF-CRYPT /etc/mail/passwd driver = passwd-file } plugin { imapsieve_mailbox1_before = file:/usr/local/lib/dovecot/sieve/report-spam.sieve imapsieve_mailbox1_causes = COPY imapsieve_mailbox1_name = Junk imapsieve_mailbox2_before = file:/usr/local/lib/dovecot/sieve/report-ham.sieve imapsieve_mailbox2_causes = COPY imapsieve_mailbox2_from = Junk imapsieve_mailbox2_name = * mail_replica = tcp:108.160.141.103:2727 replication_sync_timeout = 2 sieve = file:~/sieve;active=~/.dovecot.sieve sieve_global_extensions = +vnd.dovecot.pipe +vnd.dovecot.environment sieve_pipe_bin_dir = /usr/local/lib/dovecot/sieve sieve_plugins = sieve_imapsieve sieve_extprograms } protocols = imap lmtp service aggregator { fifo_listener replication-notify-fifo { user = vmail } unix_listener replication-notify { user = vmail } } service auth { unix_listener auth-userdb { user = vmail } } service doveadm { inet_listener { port = 2727 } user = vmail } service imap-login { inet_listener imap { port = 0 } inet_listener imaps { port = 993 ssl = yes } } service managesieve-login { inet_listener sieve { port = 4190 } } service replicator { drop_priv_before_exec = yes process_min_avail = 1 unix_listener replicator-doveadm { mode = 0600 user = vmail } } ssl = required ssl_cert = </etc/ssl/stonyrange.com.fullchain.pem ssl_dh = # hidden, use -P to show it ssl_key = # hidden, use -P to show it userdb { args = /etc/mail/passwd driver = passwd-file } protocol imap { mail_plugins = " notify replication imap_sieve" } protocol lmtp { mail_plugins = " notify replication sieve" } Antonino Sidoti

2 3

Definitive guide to running ObjectiveFS on top of a Clustered File System?
by Roel van Duijnhoven 06 Jun '21

06 Jun '21

Hey there, I am working on migrating a Dovecot system with + 50.000 users / 5TB on mail data to a new set-up that is better scalable. But I found it difficult to find a good solution. In this email I lay out what I learned, in the hope that others can profit. But also others can help me on this design before I actually start migrating. *My aim is to get a clustered file system setup for Dovecot. But with the additional constraint of not having to pay on a per-mailbox basis to some vendor. * Why a clustered file system? I believe this yields the best solution. Your machines are now stateless: consuming services. And scaling or recovery is now relatively easy. Why the constraint of not paying per-mailbox? If you did pay a fee per mailbox; you probably would be better of just using a managed mail service altogether. High-level ======== We are going to use ObjectiveFS as our clustered file system (not involved with them in any way). They use Fuse to make it behave like a POSIX filesystem. Due to the way they compact files that belong together it handles a large number of small files relatively fine. The great thing is: we can mount this filesystem on multiple machines. This piece of software is proprietary, but it's price is very reasonable, and it is a fixed monthly cost. We can use S3, Google Cloud Storage, or others as the actual storage system. We store metadata about the mailboxes in a database that is available to all machines. We can use any managed database service for this. We explicitly set the proxy_host for each user in this database. Thus every user gets routed to the same machine. We make sure to distributed the users among the available machines. All traffic is received by a TCP load balancer. This will forward the traffic to the underlying machines. Ideally this is a managed cloud service. I think there are two valid choices. But I prefer the first one: - Use a TCP pass-through load balancer. This way the source IP is retained without requiring any change to the protocol (an example of this is Google Cloud external TCP/UDP Network Load Balancing <https://cloud.google.com/load-balancing/docs/network>). - Use an TCP SSL terminating load balancer. And make it forward in HaProxy's PROXY format so we retain the source IP. That traffic is now routed to N-machines. Each of those machines runs Dovecot. And Dovecot is configured with Dovecot Proxy (not to be confused with HaProxy's PROXY protocol). Such that Dovecot will proxy the connection to another machine if required (or continue on this machine if you are already on the correct proxy_host). I believe this can be done using proxy_maybe <https://doc.dovecot.org/configuration_manual/authentication/proxies/>. Depending on the choice of load balancer you may need to configure Dovecot to understand HaProxy's PROXY format. We are going to use the maildir format. And store those files on the ObjectiveFS filesystem. The index to Dovecot is stored on a local SSD. Choice motivations =============== ObjectiveFS: - Can probably be another clustered file system as well. - But ObjectiveFS works quite well because it has support for handling many small files. And can be configured with a local SSD disk. - Using this software can get a clustered file system to run quite easy. Regarding the mailbox format: - dbox is said to be more performant. And having less files is an advantage in general. But one big disadvantage: because the index contains crucial information, you will need to place this index on the Clustered File System as well. Maildir does not have this problem, and that is why we prefer it. - obox is only available as Dovecot Pro, and solves a lot of problems. But you really can only get Dovecot Pro if you pay a fee per mailbox. We don't want that! Why don't use Dovecot Director as well? - You can not run Dovecot Director on the same machine as your Dovecot Backend / proxy. Thus we would need to introduce 2 additional hosts to just accept and route the traffic. This would increase the complexity of our solution. - But it could be build on top of this set-up fairly easy. - I don't see too many advantages for Director however currently. - One big advantage *could* be if it would automatically remove failed nodes. However this only works if you use Dovemon <https://doc.dovecot.org/configuration_manual/dovemon/>. And that is packaged with OX/Dovecot and thus requires paying per user. - So in case you want to put a node down you get a slightly easier API to do so. Namely *doveadm director add <backend server ip> 0*. However we can simply imitate this by updating our database and changing the proxy_host to another destination as well. Load balancer - You could also set-up your MX records to directly point to your Dovecot nodes. This should work as well I guess. - But I think the load balancer makes for better control, over changing and managing DNS. Questions ======== In general I'd like to know whether this is a good idea! But some other questions I have at this point that could make or break this setup: - Can a Dovecot backend instance be configured to *also* run Dovecot proxy? - Can a Dovecot Proxy node receive HaProxy PROXY traffic? Details ===== Once I am sure I am on the right track I'd like to post the settings I use for the software as well. But let's first discuss the stuff above! Best, Roel van Duijnhoven

2 1

possible minor bug: lmtp excessice newlines
by Laura Steynes 06 Jun '21

06 Jun '21

Aki, unnecessary newlines in lmtp received header? Received: from mail6.xxxxxxxxxx.com by mail6.xxxxxxx.com with LMTP id xxxxxxxxxxxxxxxxxx (envelope-from <xxxxxx(a)xxxxxxxx.net>) for <xxx(a)xxxxxxxx.net>; Sat, 05 Jun 2021 14:19:07 +0100 is this intentional Aki ? Evident is multiple clients, in widescreen, so is inot client squashing the header # Dovecot version 2.3.14 # Pigeonhole version 0.5.14 # OS: Linux 5.10.41 x86_64

1 0

Panic on indexer-worker and Dovecot stop to search on Solr
by Alessio Cecchi 03 Jun '21

03 Jun '21

Hi, I have setup on a (little busy) Dovecot server FTS with Solr and Virtual folder to enable "search in all folders" for users. All works fine until for some users the indexer-worker process crash. After this crash Dovecot stop to query Solr for new search in BODY, returning SERVERBUG, for all users on the server and only with a dovecot restart users can search in BODY again. Before the dovecot restart I can see that on Solr server no query from dovecot arriving anymore (for SEARCH BODY because SEARCH in FROM/TO/SUBJECT still works fine) Dovecot version is 2.3.14 (from RPM) and Apache Solr si 7.7.3. Here is the error found in the log: May 31 14:58:13 Panic: indexer-worker(user(a)email.com) session=<VA0oxZ/DXtG5Ydlx:0KzOIkLdtGDSawAAxbYlJw>: file http-client-request.c: line 1240 (http_client_request_send_more): assertion failed: (req->payload_input != NULL) May 31 14:58:13 Error: indexer-worker(user(a)email.com) session=<VA0oxZ/DXtG5Ydlx:0KzOIkLdtGDSawAAxbYlJw>: Raw backtrace: /usr/lib64/dovecot/libdovecot.so.0(backtrace_append+0x42) [0x7f3d91b2cac2] -> /usr/lib64/dovecot/libdovecot.so.0(backtrace_get+0x1e) [0x7f3d91b2cbce] -> /usr/lib64/dovecot/libdovecot.so.0(+0xf3cde) [0x7f3d91b39cde] -> /usr/lib64/dovecot/libdovecot.so.0(+0xf3d81) [0x7f3d91b39d81] -> /usr/lib64/dovecot/libdovecot.so.0(i_fatal+0) [0x7f3d91a8b25a] -> /usr/lib64/dovecot/libdovecot.so.0(http_client_request_send_more+0x3dd) [0x7f3d91ad39ad] -> /usr/lib64/dovecot/libdovecot.so.0(http_client_connection_output+0xf1) [0x7f3d91ad8101] -> /usr/lib64/dovecot/libdovecot.so.0(+0x11d2b0) [0x7f3d91b632b0] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_call_io+0x65) [0x7f3d91b51f45] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0x12b) [0x7f3d91b538fb] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_handler_run+0x59) [0x7f3d91b52049] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_run+0x38) [0x7f3d91b52288] -> /usr/lib64/dovecot/libdovecot.so.0(http_client_wait+0xcd) [0x7f3d91ae120d] -> /usr/lib64/dovecot/lib21_fts_solr_plugin.so(solr_connection_select+0xe4) [0x7f3d8fca1174] -> /usr/lib64/dovecot/lib21_fts_solr_plugin.so(+0x45d4) [0x7f3d8fc9d5d4] -> /usr/lib64/dovecot/lib20_fts_plugin.so(fts_backend_get_last_uid+0x6e) [0x7f3d90e103fe] -> /usr/lib64/dovecot/lib20_fts_plugin.so(+0xf952) [0x7f3d90e16952] -> /usr/lib64/dovecot/lib20_fts_plugin.so(+0x10ef6) [0x7f3d90e17ef6] -> /usr/lib64/dovecot/lib20_virtual_plugin.so(+0x966a) [0x7f3d90bfc66a] -> /usr/lib64/dovecot/lib20_fts_plugin.so(+0x10ba6) [0x7f3d90e17ba6] -> /usr/lib64/dovecot/libdovecot-storage.so.0(mail_precache+0x2e) [0x7f3d91e3cb0e] -> dovecot/indexer-worker [user(a)email.com Virtual/All - 5300/20832](+0x2924) [0x5648464be924] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_call_io+0x65) [0x7f3d91b51f45] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0x12b) [0x7f3d91b538fb] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_handler_run+0x59) [0x7f3d91b52049] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_run+0x38) [0x7f3d91b52288] -> /usr/lib64/dovecot/libdovecot.so.0(master_service_run+0x13) [0x7f3d91abcbb3] -> dovecot/indexer-worker [user(a)email.com Virtual/All - 5300/20832](main+0xd7) [0x5648464be1f7] -> /lib64/libc.so.6(__libc_start_main+0xf5) [0x7f3d9169a555] -> dovecot/indexer-worker [user(a)email.com Virtual/All - 5300/20832](+0x22ba) [0x5648464be2ba] May 31 14:58:13 Fatal: indexer-worker(user(a)email.com) session=<VA0oxZ/DXtG5Ydlx:0KzOIkLdtGDSawAAxbYlJw>: master: service(indexer-worker): child 27602 killed with signal 6 (core dumps disabled - https://dovecot.org/bugreport.html#coredumps) on Solr side I found this error log: org.apache.solr.common.SolrException: Early EOF at org.apache.solr.handler.loader.XMLLoader.load(XMLLoader.java:190) at org.apache.solr.handler.UpdateRequestHandler$1.load(UpdateRequestHandler.java:97) at org.apache.solr.handler.ContentStreamHandlerBase.handleRequestBody(ContentStreamHandlerBase.java:68) at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:199) at org.apache.solr.core.SolrCore.execute(SolrCore.java:2551) at org.apache.solr.servlet.HttpSolrCall.execute(HttpSolrCall.java:733) at org.apache.solr.servlet.HttpSolrCall.call(HttpSolrCall.java:531) at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:395) [...] and [com.ctc.wstx.exc.WstxLazyException] com.ctc.wstx.exc.WstxIOException: Early EOF at com.ctc.wstx.exc.WstxLazyException.throwLazily(WstxLazyException.java:45) at com.ctc.wstx.sr.StreamScanner.throwLazyError(StreamScanner.java:728) at com.ctc.wstx.sr.BasicStreamReader.safeFinishToken(BasicStreamReader.java:3678) at com.ctc.wstx.sr.BasicStreamReader.getText(BasicStreamReader.java:860) at org.apache.solr.handler.loader.XMLLoader.readDoc(XMLLoader.java:419) at org.apache.solr.handler.loader.XMLLoader.processUpdate(XMLLoader.java:260) at org.apache.solr.handler.loader.XMLLoader.load(XMLLoader.java:188) at org.apache.solr.handler.UpdateRequestHandler$1.load(UpdateRequestHandler.java:97) This is the relevant part of dovecot configuration: plugin { fts = solr fts_autoindex = yes fts_decoder = decode2text fts_enforced = body fts_index_timeout = 5s fts_solr = url=http://10.0.1.3:8983/solr/dovecot/ [...] } Is this an already know bug? Any workaround? Thanks -- Alessio Cecchi Postmaster @ http://www.qboxmail.it https://www.linkedin.com/in/alessice

2 4

Dovecot Stats for Logwatch
by Plutocrat 03 Jun '21

03 Jun '21

Hi all, I run logwatch on a few servers and the script on there which parses the dovecot logs provides waaaaaay too much detail, and contains a bunch of stuff I'm not interested in. There's not much point in having a log summary if its 100Kb long! The one for exim is also terrible, but I've replaced that with eximstats, and a bit of bash scripting and have something I can work with. I might at some point look at replacing that too. Now to my question. I haven't found anything in the dovecot family which compares to eximstats. I was wondering if there possibly is a report tool, or a way of extracting stats from doveadm just for key metrics such as 'number of POP logins in the last 24 hours', number of failed passwords, etc. Things that might be interesting on a logwatch report. Or maybe someone has written a script already that can be used in logwatch in perl, python, bash, whatever. Any pointers, suggestions, or ideas for useful summary metrics to pull out of the logfiles are appreciated. I suspect I might end up writing one myself anyway, but I'm just keen to see what already exists, get the benefit of anyone else's experiences in this matter before I start. P.

3 8

fts_autoindex_exclude for everything in a namespace?
by Daniel J. Luke 03 Jun '21

03 Jun '21

Hi, I've recently moved a system from using procmail to delivering via dovecot-lmtp w/ sieve - and it's great! I've got a copy of incoming mail going into mbox archives (that I compress after months end), and my mail log is full of "Error: fts: Failed to sync mailbox #Archive: Mailbox isn't selectable", though. I /think/ fts_autoindex_exclude = #Archive/* is what I want, but it doesn't seem to silence the error. I don't need the #Archive mailboxes visible to clients, but I don't mind if they are. I tried some setting the archive prefix = AutoArchive and setting list = yes, but that didn't silence the error. I feel like I'm probably missing something obvious :) dovecot 2.3.14 / pigenohole 0.5.14 relevant config from dovecot -n: mail_location = mbox:~/Mail/:INBOX=~/.mbox:INDEX=~/.dovecot-indexes mail_plugins = fts fts_lucene zlib namespace { inbox = yes location = mailbox Drafts { auto = no special_use = \Drafts } mailbox Sent { auto = subscribe special_use = \Sent } mailbox Trash { auto = no special_use = \Trash } mailbox spam { auto = create special_use = \Junk } prefix = separator = / } namespace archive { inbox = no list = no location = mbox:~/MailArchive/ prefix = "#Archive/" separator = / } plugin { fts = lucene fts_autoindex = yes fts_lucene = whitespace_chars=@. recipient_delimiter = + sieve = file:~/.sieve;active=~/.dovecot.sieve sieve_default = /usr/local/etc/dovecot/sieve/default.sieve sieve_default_name = file_spam } and the archive sieve script (which works) looks like this: if currentdate :matches "month" "*" { set "month" "${1}"; } if currentdate :matches "year" "*" { set "year" "${1}"; } if true { fileinto :copy :create "#Archive/${year}-${month}"; } -- Daniel J. Luke

1 0

userdb volatiledir setting not working
by Александер Скобельцын 02 Jun '21

02 Jun '21

Hi all! I just can't deal with VOLATILEDIR userdb setting on my mailservers. For example dovecot-uidlist.lock files are still being created over our network mail store. So, several days ago I changed my user and passwd query setting to include this option and restarted all my dovecot servers. Now it looks like (we use mysql driver): user_query = \ SELECT \ `u`.`pop` AS `home`, \ `u`.`uid`, \ `u`.`gid`, \ CONCAT('maildir:', `u`.`smtp`, ':INDEX=/var/dovecot_indexes/%d/%u:VOLATILEDIR=/var/dovecot_indexes/%d/%u') AS `mail`, \ CONCAT('*:bytes=', `u`.`quota`, 'M') AS `quota_rule` ,\ CONCAT('url=http://', fts_solr, ':8983/solr/dovecot/') AS fts_solr \ FROM `users` AS `u` \ JOIN `domains` AS `d` ON `d`.`domain_id` = `u`.`domain_id` \ WHERE \ `u`.`username` = '%u' \ AND `u`.`enabled` = 1 \ AND `d`.`enabled` = 1 \ AND `u`.`type` IN ('local', 'piped') password_query = \ SELECT \ `u`.`username` AS `user`, \ `u`.`crypt` AS `password`, \ `u`.`pop` AS `userdb_home`, \ `u`.`uid` AS `userdb_uid`, \ `u`.`gid` AS `userdb_gid`, \ CONCAT('maildir:', `u`.`smtp`, ':INDEX=/var/dovecot_indexes/%d/%u:VOLATILEDIR=/var/dovecot_indexes/%d/%u') AS `userdb_mail`, \ CONCAT('*:bytes=', `u`.`quota`, 'M') AS `userdb_quota_rule` \ FROM `users` AS `u` \ JOIN `domains` AS `d` ON `d`.`domain_id` = `u`.`domain_id` \ WHERE \ `u`.`username` = '%u' \ AND `u`.`enabled` = 1 \ AND `d`.`enabled` = 1 \ AND `u`.`type` IN ('local', 'piped') The aim was to move .lock and another temp files out of network storage our mails are stored. We use CephFS for storing user emails (maildir format). In addition we use 3 imap servers, each mount exact same path in cephfs and 2 dovecot directors to handle user=imapserver mapping, so user shouldn't exist on more than one imapserver at a time. Am I must use CONTROL directive in addition to force move control files from network store for VOLATILEDIR setting to work properly or I just misconfigured something? Extra info: dovecot --version 2.3.14 (cee3cbc0d)

1 0

debugging file permissions wrong
by Laura Steynes 02 Jun '21

02 Jun '21

Hi, In trying to debug a strange error where client can't login, I enabled all the usual debug settings, this is all good, it works for imap and pop3 fine, but the problem is when used with dovecot's LDA there is a nasty issue. the file created by debug_log_path in this case /var/log/dovecot/debug.log , this file created as root, again this is fine for nice logging of imap and pop3, but this causes postfix not to deliver mail, for write permission denied, LDA runs as vmail, all my sub sections like *_listener also = vmail and all my uid/gid settings are also to user/group vmail obviously you wont main log files to not be owned by vmail for case of security, so is there a way to set the ownership of the debug file - apart from the obvious of remembering 40 minutes later when you get alert of high mailq level to chown the file :) If there is no way, may the developers take this as a feature request please. Thanks Loz

2 3

New Configuration
by Eric Shields | Mass Transit Honchkrow 29 May '21

29 May '21

Hi, I'm setting up an email server behind a NAT, and I have the necessary DNS records, iptables/ufw rules, and ACLs in place. However, I cannot sign in with my chosen username, which does exist on the same computer I'm hosting the server on. I am using PAM, not a database, to hold credential information, and SSL certificates are active. However, I am getting signal 15 for the following processes: anvil, config, and auth. I can confirm through telnet that the ports I am using are open, and these ports are also open on the WAN side, which I believe is needed. Do you have any pointers for me, or any additional clarifying details? - 🚏

2 1

Different Maildir Locations
by Gabx 28 May '21

28 May '21

Hi, on my vps (debian stable) I have an email system with postfix, dovecot, virtual users and domains. I have 3 users with different mail_locations. the first mail_location = maildir: ~ / Maildir the second mail_location = maildir: ~ / user1 / Maildir the third mail_location = maildir: ~ / user2 / mail In postfix the above schema is represented in virtual_mailbox_maps. In dovecot mail_location is set maildir:~/Maildir. The first user receives regular mail, the other two none. I tried to see if in dovecot there was the possibility to configure the mail_location specifically for each single user, but with namespaces and userdb I am a bit confused and I have not found specific examples for my case. regards Gab -- GPG fingerprint: 5A6A F742 ACEA C9A7 93A8 8D5E 7AEF 5A02 D080 89F7 Contact: xmpp://gabx@jabber.tcpreset.net

3 14

replicator: Panic: data stack: Out of memory when allocating ...
by Jörg Faudin Schulz 28 May '21

28 May '21

frequently, the replicator fails on allocating memory: replicator: Panic: data stack: Out of memory when allocating ... bytes. I already have increased default_vsz_limit=1024M but this only increased the ... value. What can be done here? dovecot_branch=release-2.3.14

2 3

Mailbox problem on centos O/S after some "fiddling"
by John Richards 28 May '21

28 May '21

Good day from Somerset, England Version 2.2.10 Problem after a huge centos update Data:- Server has 8 mailboxes under /var/mail/"user name" history:- After update, mail to ONE user was going into mqueue as undeliverable Had to delete and recreate the user. somewhere along the line (ME!) /var/mail/;imap var/mail/new were deleted After new user and reboot server no one could access mailboxes with password error except ONE user randomly....This created the /var/mail/.mbox folder and sub folders but with the owner as the user name. Then any mail for other users was put in the /var/new folder and just sat there. only the "owner" of this folder could get mail, everyone else was prohibited with password error. chown the folder (owner:group) to root did nothing BUT When .mbox was give PUBLIC execute permissions (771) suddenly everything works fine! I do not understand why dovecot creates this folder as we ONLY ever use pop3 (currently with plain text auth but going to secure when this sorted) for mail and also why when it writes the blank folder it "owns" it with the user accessing it (also the /var/mail/new folder takes the same owner) I have trolled everywhere and spent a whole day on this so any clues would be very gratefully accepted as do not like to leave this folder as 771 (note the folder INBOX within it is only 770 and the log file in that is 660) Is this INBOX needed at all for pop3 ? rgds John Richards UK ================= dovecot -n # 2.2.10: /etc/dovecot/dovecot.conf # OS: Linux 3.10.0-514.2.2.el7.x86_64 x86_64 CentOS Linux release 7.3.1611 (Core ) ext4 auth_mechanisms = plain login disable_plaintext_auth = no mail_location = mbox:/var/mail/:INBOX=/var/mail/%u mbox_write_locks = fcntl namespace inbox { inbox = yes location = mailbox Drafts { special_use = \Drafts } mailbox Junk { special_use = \Junk } mailbox Sent { special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Trash { special_use = \Trash } prefix = } passdb { driver = shadow } protocols = pop3 service imap-login { inet_listener imap { port = 143 } inet_listener imaps { port = 993 ssl = yes } } ssl_cert = </etc/pki/tls/certs/watchetwebdesign.co.uk.crt ssl_key = </etc/pki/tls/private/watchetwebdesign.co.uk.key userdb { driver = passwd }

2 1

NFS Locking Question
by Zane Zak 28 May '21

28 May '21

Hi! I'm hoping to get some clarification on NFS locking before deploying a new setup. We have a single exim server that delivers mail to mbox files in /var/mail. We have a separate server running dovecot that reads mail from these mbox files. So only one exim server and one dovecot server, but they're separate VMs and handle locking with dotlocks. I was noticing frequent mbox file corruption. I then set "mail_nfs_storage = yes", and have seen no mbox corruption since. However, I'm now seeing messages like this in the logs for every read... Error: nfs_flush_fcntl: fcntl(/var/mail/username, F_RDLCK) failed: Bad file descriptor Is there a configuration change that needs to be made on the dovecot or the NFS servers, or are these messages harmless. Thanks! ZZ

2 1

mail-crypt-plugin: encrypted user keys
by Daniel Schuermann 28 May '21

28 May '21

Hi, I tried to enable encrypted folder keys using mail-crypt-plugin. It works as expected when using unencrypted folder keys. When I add mail_crypt_require_encrypted_user_key = yes as shown below, I somehow manage to crash dovecot: dovecot: lmtp(82060): Fatal: master: service(lmtp): child 82060 killed with signal 6 (core not dumped - https://dovecot.org/bugreport.html#coredumps - set service lmtp { drop_priv_before_exec=yes }) dovecot: lmtp(67814): Panic: file mail-user.c: line 229 (mail_user_deinit): assertion failed: ((*user)->refcount== 1) lmtp(root): Info: msgid=<07e3a23b2aaea60b(a)mx.2718282.net>: save failed to INBOX: generate_keypair(INBOX) failed: mail_crypt_require_encrypted_user_key set, cannot generate user keypair without password or key My config files: # 2.3.14 (cee3cbc0d): /etc/mail/imap.conf # OS: OpenBSD 6.9 amd64 auth_verbose = yes debug_log_path = /var/log/dovecot info_log_path = /var/log/dovecot mail_attribute_dict = file:%h/Maildir/dovecot-attributes mail_debug = yes namespace inbox { ... } passdb { args = /etc/mail/imap-sqlite.conf driver = sql } plugin { mail_crypt_curve = secp521r1 mail_crypt_require_encrypted_user_key = yes mail_crypt_save_version = 2 } protocols = imap lmtp service imap-login { ... } ssl = required ssl_cert = </etc/ssl/rsa.crt ssl_key = # hidden, use -P to show it ssl_min_protocol = TLSv1.2 ssl_prefer_server_ciphers = yes userdb { args = /etc/mail/imap-sqlite.conf driver = sql override_fields = uid=vmail gid=vmail } # file: /etc/mail/imap-sqlite.conf driver = sqlite connect = /etc/mail/sqlite.db default_pass_scheme = BLF-CRYPT user_query = SELECT '/home/vmail/'||destination AS home FROM virtuals WHERE email = '%u' password_query = SELECT email as user, password, '%w' AS \ userdb_mail_crypt_private_password FROM credentials WHERE email = '%u'

2 1

missing +w perm
by Jeff Abrahamson 28 May '21

28 May '21

I've started seeing the following error in mail.err for precisely one user on precisely one domain: Error: mkdir(/var/mail/vmail//jeff/mail) failed: Permission denied (euid=1000(jeff) egid=1001(jeff) missing +w perm: /var/mail/vmail/, dir owned by 4000:4000 mode=0755) Error: Mailbox INBOX: Failed to autocreate mailbox: Internal error occurred. In mail.log I see a bit more: Warning: Failed to parse address from `From_'-line: Missing domain Error: mkdir(/var/mail/vmail//jeff/mail) failed: Permission denied (euid=1000(jeff) egid=1001(jeff) missing +w perm: /var/mail/vmail/, dir owned by 4000:4000 mode=0755) Error: mkdir(/var/mail/vmail//jeff/mail) failed: Permission denied (euid=1000(jeff) egid=1001(jeff) missing +w perm: /var/mail/vmail/, dir owned by 4000:4000 mode=0755) Error: Mailbox INBOX: Failed to autocreate mailbox: Internal error occurred. Refer to server log for more information. save failed to open mailbox INBOX: Mailbox INBOX: Failed to autocreate mailbox: Internal error occurred. And yet there's no apparent problem sending and receiving mail for user jeff, for all domains handled by the server. Other users have no issues. The /var/mail/vmail/ hierarchy is all owned by vmail:vmail (4000:4000) and directories are all 0755. I suspect a red herring except it's been continuing for a week now. I was reading this page (following some searching), but it doesn't seem pertinent in the end. https://wiki2.dovecot.org/MailLocation/mbox#A.2BAC8-var.2BAC8-mail.2BAC8_do… Any suggestions what this might be? -- Jeff Abrahamson +33 6 24 40 01 57 +44 7920 594 255 http://p27.eu/jeff/ http://mobilitains.fr/

2 2

backup v rsync
by Jeff Abrahamson 27 May '21

27 May '21

I've been migrating from a dovecot 2.2.22 instance to a dovecot 2.3.7.2 instance. (Said differently, from an ubuntu 16.04 host to a 20.04 host.) It's a tiny site: only a handful of users actually had to migrate, most either died on the old one or were born on the new one. The main user in need of migration was me. After fiddling with dsync and not getting it working, I threw in the towel. This is a migration I had to do once for precisely one user. I had been using the old host exclusively, so it was easy to shut down both dovecot instances the time it took me to rsync my data from one to the other. Now that seems to work, almost. Mail is being delivered to my inbox, anyway. Most other folders are looking inaccessible to my mail client (thunderbird, for this test). The main difference between the two servers, aside from the above, is a switch from mail_location = maildir:~/Maildir to mail_home = /var/mail/vmail/%d/%n mail_location = maildir:/var/mail/vmail/%d/%n/mail:LAYOUT=fs mail_privileged_group = mail I corrected permissions and ownership when I copied the data. Now I think the problem is that LAYOUT=fs means that I should have a slightly different folder hierarchy now. The question is how best to fix this. I have things like this .Archives.2020 .Archives.2020/new .Archives.2020/tmp .Archives.2020/cur when I think I should have things like this Archives Archives/2021 Archives/2021/new Archives/2021/tmp Archives/2021/cur And, again, this is one-off, so a manual fix seems most appropriate. I'm quite tempted simply to shut down the dovecot instance for a minute at a quiet moment (mail retries...) and rename directories as indicated above. I only have to rename five directories. Having gotten myself in a bit of a muddle on this, I thought perhaps a reality check that I'm not about to make it worse would be appropriate. Many thanks. -- Jeff Abrahamson +33 6 24 40 01 57 +44 7920 594 255 https://www.p27.eu/jeff/ https://www.mobilitains.fr/

2 2

API command for ACL Delete
by Rhodri Jones 27 May '21

27 May '21

I asked previously for info about the API options for doveadm acl delete but I think my question was misunderstood. I want to know the command I would use (with curl for instance) that corresponds with: doveadm acl delete -u <targetmailbox> INBOX user=<targetuser> Using the python client for doveadm http API I can see the valid parameters but I don't seem to be able to get the correct syntax. (doveadm) aclDelete ? invalid parameter: ? valid parameters for aclDelete: - userFile (string) - allUsers (boolean) - mailbox (string) - user (string) - socketPath (string) - id (string) --

2 2

API command for ACL Delete
by Rhodri Jones 26 May '21

26 May '21

Can anyone tell me how to do the following using the API. doveadm acl get -u <targetmailbox> INBOX doveadm acl delete -u <targetmailbox> INBOX user=$user Are the ACL API options documented somewhere? Thanks --

2 1

Re: [EXT] Re: Dovecot Stats for Logwatch
by Plutocrat 26 May '21

26 May '21

On 26/05/2021 14.33, Aki Tuomi wrote: > I am not sure what is not working for you... > does `doveadm stats dump` work? a) Before any stats config it works without error, but gives no output. doveadm stats dump metric_name field count sum min max avg median stddev %95 b) If I then enable conf.d/95-stats.conf containing service stats { inet_listener http { port = 9900 } } metric client_connections { filter = event=client_connection_finished } metric auth_success { filter = (event=auth_request_finished AND success=yes) } metric mail_delivery { filter = event=mail_delivery_finished } ... it works but doesn't seem to collect any data, even if left for 24 hours doveadm stats dump metric_name field count sum min max avg median stddev %95 client_connections duration 0 0 0 0 0.00 0 0.00 0 auth_success duration 0 0 0 0 0.00 0 0.00 0 mail_delivery duration 0 0 0 0 0.00 0 0.00 0 c) If I then enable the bits of config that I'm informed will populate the data repository: # In 10-master.conf mail_plugins = stats # In 20-imap.conf protocol imap { mail_plugins = $mail_plugins quota imap_quota } # In 20-pop.conf protocol pop3 { mail_plugins = $mail_plugins quota } ... it then complains doveadm stats dump Fatal: Plugin 'stats' not found from directory /usr/lib/dovecot/modules d) I just changed the in in 10-master-conf to reference old-stats instead of stats, based on my new knowledge and it doesn't complain about the missing module any more. But I'm still not collecting data after 30 mins. doveadm stats dump metric_name field count sum min max avg median stddev %95 client_connections duration 0 0 0 0 0.00 0 0.00 0 auth_success duration 0 0 0 0 0.00 0 0.00 0 mail_delivery duration 0 0 0 0 0.00 0 0.00 0 I can do wget http://localhost:9900/metrics and I just get a file that says VERSION stats-reader-server 2 0 At this point I'm thinking I'll just write a bash script to parse the logs, but thought I'd see it through as it might help other intrepid dovecot users. P.

2 3

Problem with per-user \Seen flag on public folder
by Bartek Szady 26 May '21

26 May '21

Hello I have noticed that when per-user \Seen flag is configured dovecot do not respond properly to 'store' command. eg.: =============== 42 uid store 6 +Flags (\Seen) 42 OK Store completed (0.001 + 0.000 secs). 43 IDLE + idling DONE 43 OK Idle completed (3.204 + 3.203 + 3.203 secs). =============== Thunderbird is confused by this and read emails turns into unread after a while. When global flag is stored dovecot responds as it should, I think: =============== 32 uid store 3 -Flags (\Flagged) * 2 FETCH (UID 3 FLAGS ()) 32 OK Store completed (0.002 + 0.000 + 0.001 secs). 33 IDLE + idling DONE 33 OK Idle completed (5.362 + 5.362 + 5.361 secs). =============== When per-user \Seen flag is not configured: =============== 25 uid store 6 +Flags (\Seen) * 4 FETCH (UID 6 FLAGS (\Seen)) 25 OK Store completed (0.002 + 0.000 + 0.001 secs). 26 IDLE + idling * OK Still here DONE 26 OK Idle completed (65.076 + 65.076 + 65.076 secs). =============== # doveconf -n # 2.3.14 (cee3cbc0d): dovecot-int.conf # OS: Linux 5.1.16 x86_64 # Hostname: #hidden auth_mechanisms = plain login base_dir = /var/run/dovecot-int default_internal_group = dovecot1 default_internal_user = dovecot1 default_login_user = dovenull1 disable_plaintext_auth = no login_log_format = int %$: %s mail_debug = yes mail_location = maildir:~/Mail/Maildir mail_log_prefix = "int-%s(%u)<%{pid}><%{session}>: " namespace { inbox = yes location = prefix = separator = / type = private } passdb { args = scheme=MD5-CRYPT /etc/dovecot/passwd-int driver = passwd-file } passdb { args = scheme=MD5-CRYPT /etc/dovecot/virtual-int driver = passwd-file } passdb { driver = pam } plugin { acl = vfile } protocols = pop3 imap service auth { user = root } service imap-login { group = dovenull1 inet_listener imap { address = <ips> } user = dovecot1 } service pop3-login { group = dovenull1 inet_listener pop3 { address = <ips> } } service stats { unix_listener stats-writer { mode = 0660 user = pubmail } } ssl_cert = </var/lib/openssl/certs/imap-int.crt ssl_dh = # hidden, use -P to show it ssl_key = # hidden, use -P to show it userdb { args = /etc/dovecot/virtual-int driver = passwd-file } userdb { driver = passwd } protocol imap { mail_plugins = acl imap_acl namespace { location = maildir:/srv/mail/public:LAYOUT=fs:INDEXPVT=~/Mail/public prefix = publiczne/ separator = / subscriptions = no type = public } ssl = yes } Bartek

2 1

What am I doing wrong?
by Ron Garret 26 May '21

26 May '21

I’m trying to run an imapsieve script when a user sends a message (this is part of a spam filter and I want to use outgoing messages to train the filter on good content). This is my config: plugin { sieve_plugins = sieve_imapsieve sieve_extprograms sieve = file:/var/mail/sieve/incoming.sieve # From elsewhere to Junk imapsieve_mailbox1_name = Junk imapsieve_mailbox1_causes = COPY imapsieve_mailbox1_before = file:/var/mail/sieve/spam.sieve # From Junk to elsewhere imapsieve_mailbox2_name = * imapsieve_mailbox2_from = Junk imapsieve_mailbox2_causes = COPY imapsieve_mailbox2_before = file:/var/mail/sieve/ham.sieve # Sent imapsieve_mailbox3_name = 'Sent Messages' imapsieve_mailbox3_causes = APPEND imapsieve_mailbox3_before = file:/var/mail/sieve/sent.sieve sieve_pipe_bin_dir = /var/mail/sieve sieve_global_extensions = +vnd.dovecot.pipe +vnd.dovecot.environment } The first two scripts (for training spam and ham respectively) both work. Once upon a time I had the third one working as well, but apparently I changed something that made it break and I have no idea what that could be. (Yes, I need to get my code into revision control. I’ve already beaten myself up over that more than once.) The problem appears to be in the config, not the sieve script, because the script is never compiled into a .svbin while the other scripts in the same directory are compiled. But just for the record, this is the sieve script: > ➔ cat /var/mail/sieve/sent.sieve > require ["vnd.dovecot.pipe", "copy", "imapsieve", "environment", "variables"]; > > if environment :matches "imap.user" "*" { > set "username" "${1}"; > } > > pipe :copy "train.py" [ "sent", "${username}" ]; Does anyone here see the problem that I’m missing? Thanks, rg

1 1

sqlite + IMAP Authentication issues - user unknown
by Scott Edwards 26 May '21

26 May '21

Hello, I'm not on the maillist, please reply all. It's been a few years since I've setup a mail server (I feel like a noob!). The following syslog message is isolating the auth issues. I have sqlite, and want to keep it this way. I don't see more than a few mailboxes to setup until sometime later, but if it does grow, I'll stand up PostgreSQL. FQDN is 'localcar.repair'. May 24 21:01:45 localcar dovecot: auth: Debug: client in: AUTH#0116#011PLAIN#011service=imap#011secured=tls#011session=Rb8dshnD/Gwv2Ixo#011lip=45.33.2.221#011rip=47.216.140.104#011lport=993#011rport=27900#011local_name=localcar.repair#011ssl_cipher=TLS_AES_128_GCM_SHA256#011ssl_cipher_bits=128#011ssl_pfs=KxANY#011ssl_protocol=TLSv1.3#011resp=<hidden> May 24 21:01:49 localcar dovecot: auth-worker(20614): Debug: sql(webmaster-foo(a)localcar.repair,47.216.140.104,<Rb8dshnD/Gwv2Ixo>): query: SELECT password, userid as user FROM users WHERE userid = 'webmaster-foo' AND domain = 'localcar.repair' May 24 21:01:49 localcar dovecot: auth-worker(20614): sql(webmaster-foo(a)localcar.repair,47.216.140.104,<Rb8dshnD/Gwv2Ixo>): unknown user (given password: topsecret) May 24 21:01:51 localcar dovecot: auth: Debug: client passdb out: FAIL#0116#011user=webmaster-l5buyjuxao8@localcar.repair#011original_user=webmaster-foo@localcar.repair May 24 21:01:51 localcar dovecot: imap-login: Debug: Ignoring unknown passdb extra field: original_user root@localcar:/etc/dovecot# sqlite3 users SQLite version 3.27.2 2019-02-25 16:06:06 Enter ".help" for usage hints. sqlite> .schema CREATE TABLE users ( userid VARCHAR(128) NOT NULL, domain VARCHAR(128) NOT NULL, password VARCHAR(64) NOT NULL, home VARCHAR(255) NOT NULL, uid INTEGER NOT NULL, gid INTEGER NOT NULL ); sqlite> select * from users; webmaster-foo|localcar.repair|topsecret|/tmp|1000|1000 Thunderbird naturally says "Login to server localcar.repair with username webmaster-foo(a)localcar.repair failed. [ ok ] Restarting dovecot (via systemctl): dovecot.service. root@localcar:/etc/dovecot# dovecot -n # 2.3.4.1 (f79e8e7e4): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.4 () # OS: Linux 4.19.0-16-amd64 x86_64 Debian 10.9 # Hostname: localcar.repair auth_debug = yes auth_verbose = yes auth_verbose_passwords = yes mail_location = mbox:~/mail:INBOX=/var/mail/%u mail_privileged_group = mail namespace inbox { inbox = yes location = mailbox Drafts { special_use = \Drafts } mailbox Junk { special_use = \Junk } mailbox Sent { special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Trash { special_use = \Trash } prefix = } passdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } protocols = " imap lmtp" ssl_cert = </etc/dovecot/private/dovecot.pem ssl_client_ca_dir = /etc/ssl/certs ssl_dh = # hidden, use -P to show it ssl_key = # hidden, use -P to show it userdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } Thank you, Scott

2 2

Help with "doveadm" - Socket ?
by White, Daniel E. (GSFC-770.0)[NICS] 25 May '21

25 May '21

doveadm [-f formatter] mailbox status [-A|-u user] [-S socket_path] [-t] fields mailbox ... Where do I find this "socket_path", please ? I am trying to untangle a very old CentOS 6 instance. Thanks in advance.

4 7

Panic: file ostream-zlib.c
by Bouke J. Henstra | ICT Diensten 24 May '21

24 May '21

Hello, At the moment I am investigating an issue (probably) related to Dovecot /zlib. I am hoping someone is willing to help. Thanks. #Background information Every time a certain user checked her e-mail the following errors would appear in "/var/log/mail.err" (please find the lines below). I am using zlib (please find the details in the configuration below). I did include the Dovecot version, OS details, CPU details and file system details in this message. I did migrate the whole mail domain to Microsoft 365 (as the user has an active subscription and had to move on - for me this was the fastest method to help the user in this case). The mailbox still exists on the server. I suspect there's file corruption somewhere? I am routing mail from the domain to xxxxx-xx.mail.protection.outlook.com (just to be sure that the user doesn't miss anything - mx records have been updated). I did notice that the user had issues with receiving mail. Outlook would keep trying to fetch mail and was hard to close (user had to kill Outlook through the task manager - after migrating to Microsoft 365 this problem is resolved too). I would like to find out what causes/caused this problem. I would like to understand the problem and would like to try to avoid future problems. I did run "dovecot-sysreport" but I did notice the data is not anonymized. I can anonymize the details and submit those if required. #Dovcecot version root@s1:/# dovecot --version 2.3.4.1 (f79e8e7e4) #Operating system root@s1:/# uname -a Linux s1 4.19.0-16-amd64 #1 SMP Debian 4.19.181-1 (2021-03-19) x86_64 GNU/Linux root@s1:/# cat /etc/debian_version 10.9 #CPU Architecture root@s1:/# lscpu Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Byte Order: Little Endian #File System ext4 errors=continue,usrjquota=quota.user,grpjquota=quota.group,jqfmt=vfsv0 0 1 #Errors May 17 22:37:11 s1 dovecot: imap(xxxx(a)xxxxx.xx)<18570><MxyEjIzCs8pSoYVo>: Panic: file ostream-zlib.c: line 37 (o_stream_zlib_close): assertion failed: (zstream->ostream.finished || zstream->ostream.ostream.stream_errno != 0 || zstream->ostream.error_handling_disabled) May 17 22:37:11 s1 dovecot: imap(xxxx(a)xxxxx.xx)<18570><MxyEjIzCs8pSoYVo>: Error: Raw backtrace: /usr/lib/dovecot/libdovecot.so.0(+0xdb73b) [0x7f45c109973b] -> /usr/lib/dovecot/libdovecot.so.0(+0xdb7d1) [0x7f45c10997d1] -> /usr/lib/dovecot/libdovecot.so.0(+0x4a199) [0x7f45c1008199] -> /usr/lib/dovecot/modules/lib20_zlib_plugin.so(+0x3c6f) [0x7f45c0dc3c6f] -> /usr/lib/dovecot/libdovecot.so.0(+0xffd5e) [0x7f45c10bdd5e] -> /usr/lib/dovecot/libdovecot.so.0(o_stream_destroy+0x16) [0x7f45c10bdd86] -> /usr/lib/dovecot/libdovecot-storage.so.0(maildir_save_finish+0x18d) [0x7f45c11d046d] -> /usr/lib/dovecot/libdovecot-storage.so.0(mailbox_save_cancel+0x4d) [0x7f45c11a867d] -> dovecot/imap(+0x10f36) [0x5606b3187f36] -> dovecot/imap(+0x10ff3) [0x5606b3187ff3] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_call_io+0x6f) [0x7f45c10afbef] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0x136) [0x7f45c10b11e6] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run+0x4c) [0x7f45c10afc8c] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_run+0x40) [0x7f45c10afdf0] -> /usr/lib/dovecot/libdovecot.so.0(master_service_run+0x13) [0x7f45c1030123] -> dovecot/imap(main+0x325) [0x5606b3187bf5] -> /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xeb) [0x7f45c0e1309b] -> dovecot/imap(_start+0x2a) [0x5606b3187d8a] May 17 22:37:11 s1 dovecot: imap(xxxx(a)xxxxx.xx)<18570><MxyEjIzCs8pSoYVo>: Fatal: master: service(imap): child 18570 killed with signal 6 (core dumps disabled - https://dovecot.org/bugreport.html#coredumps) May 17 22:54:52 s1 dovecot: imap(xxxx(a)xxxxx.xx)<20321><HrbpyozCn8tSoYVo>: Panic: file ostream-zlib.c: line 37 (o_stream_zlib_close): assertion failed: (zstream->ostream.finished || zstream->ostream.ostream.stream_errno != 0 || zstream->ostream.error_handling_disabled) May 17 22:54:52 s1 dovecot: imap(xxxx(a)xxxxx.xx)<20321><HrbpyozCn8tSoYVo>: Error: Raw backtrace: /usr/lib/dovecot/libdovecot.so.0(+0xdb73b) [0x7fda4a55473b] -> /usr/lib/dovecot/libdovecot.so.0(+0xdb7d1) [0x7fda4a5547d1] -> /usr/lib/dovecot/libdovecot.so.0(+0x4a199) [0x7fda4a4c3199] -> /usr/lib/dovecot/modules/lib20_zlib_plugin.so(+0x3c6f) [0x7fda4a27ec6f] -> /usr/lib/dovecot/libdovecot.so.0(+0xffd5e) [0x7fda4a578d5e] -> /usr/lib/dovecot/libdovecot.so.0(o_stream_destroy+0x16) [0x7fda4a578d86] -> /usr/lib/dovecot/libdovecot-storage.so.0(maildir_save_finish+0x18d) [0x7fda4a68b46d] -> /usr/lib/dovecot/libdovecot-storage.so.0(mailbox_save_cancel+0x4d) [0x7fda4a66367d] -> dovecot/imap(+0x10f36) [0x5559c9e82f36] -> dovecot/imap(+0x10ff3) [0x5559c9e82ff3] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_call_io+0x6f) [0x7fda4a56abef] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0x136) [0x7fda4a56c1e6] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run+0x4c) [0x7fda4a56ac8c] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_run+0x40) [0x7fda4a56adf0] -> /usr/lib/dovecot/libdovecot.so.0(master_service_run+0x13) [0x7fda4a4eb123] -> dovecot/imap(main+0x325) [0x5559c9e82bf5] -> /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xeb) [0x7fda4a2ce09b] -> dovecot/imap(_start+0x2a) [0x5559c9e82d8a] May 17 22:54:52 s1 dovecot: imap(xxxx(a)xxxxx.xx)<20321><HrbpyozCn8tSoYVo>: Fatal: master: service(imap): child 20321 killed with signal 6 (core dumps disabled - https://dovecot.org/bugreport.html#coredumps) #Config root@s1:/opt/scripts# dovecot -n # 2.3.4.1 (f79e8e7e4): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.4 () # OS: Linux 4.19.0-16-amd64 x86_64 Debian 10.9 # Hostname: s1.xxxxx.xx auth_mechanisms = plain login disable_plaintext_auth = no imap_capability = +SPECIAL-USE XLIST listen = *,[::] lmtp_rcpt_check_quota = yes log_timestamp = "%Y-%m-%d %H:%M:%S " mail_max_userip_connections = 100 mail_plugins = quota zlib mail_privileged_group = vmail namespace inbox { inbox = yes location = mailbox Drafts { special_use = \Drafts } mailbox Junk { special_use = \Junk } mailbox Sent { special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Trash { special_use = \Trash } prefix = separator = . } passdb { args = /etc/dovecot/dovecot-sql.conf driver = sql } plugin { quota = dict:user::file:/var/vmail/%d/%n/.quotausage quota_status_nouser = DUNNO quota_status_overquota = 552 5.2.2 Mailbox is full quota_status_success = DUNNO sieve = /var/vmail/%d/%n/.sieve sieve_after = /var/vmail/%d/%n/.ispconfig.sieve sieve_before = /var/vmail/%d/%n/.ispconfig-before.sieve sieve_max_actions = 100 sieve_max_redirects = 25 sieve_max_script_size = 2M zlib_save = gz zlib_save_level = 9 } protocols = imap pop3 lmtp service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0660 user = postfix } unix_listener auth-userdb { group = vmail mode = 0600 user = vmail } user = root } service imap-login { client_limit = 1000 process_limit = 512 } service lmtp { unix_listener /var/spool/postfix/private/dovecot-lmtp { group = postfix mode = 0600 user = postfix } } service quota-status { client_limit = 1 executable = quota-status -p postfix unix_listener /var/spool/postfix/private/quota-status { group = postfix mode = 0660 user = postfix } } service stats { unix_listener stats-reader { group = vmail mode = 0660 user = vmail } unix_listener stats-writer { group = vmail mode = 0660 user = vmail } } ssl_cert = </etc/postfix/smtpd.cert ssl_cipher_list = ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384 ssl_dh = # hidden, use -P to show it ssl_key = # hidden, use -P to show it ssl_min_protocol = TLSv1.2 userdb { driver = prefetch } userdb { args = /etc/dovecot/dovecot-sql.conf driver = sql } protocol imap { auth_verbose = yes mail_plugins = quota zlib quota imap_quota } protocol pop3 { auth_verbose = yes mail_plugins = quota zlib quota pop3_uidl_format = %08Xu%08Xv } protocol lda { mail_plugins = quota zlib sieve quota postmaster_address = postmaster(a)xxxxx.xx } protocol lmtp { mail_plugins = quota zlib quota sieve postmaster_address = postmaster(a)xxxxx.xx -- Kind regards, Bouke J. Henstra

2 1

BUG report
by Oleg Pyzin 23 May '21

23 May '21

Hello! I've compiled Dovecot without any error, but couldn't run it. ------------- The error is: ------------- Feb 09 19:22:50 master: Panic: kevent(EV_ADD, READ, 21) failed: Invalid argument Feb 09 19:22:50 master: Error: Raw backtrace: 0 libdovecot.0.dylib 0x00216d58 askpass + 136 -> 1 libdovecot.0.dylib 0x00216e78 backtrace_get + 36 -> 2 libdovecot.0.dylib 0x00221fe8 i_set_debug_file + 248 -> 3 libdovecot.0.dylib 0x002220fc default_fatal_handler + 56 -> 4 dovecot 0x000039a0 dup2_append + 1884 -> 5 libdovecot.0.dylib 0x00221a8c i_panic + 120 -> 6 libdovecot.0.dylib 0x0022c13c io_loop_handle_add + 244 -> 7 libdovecot.0.dylib 0x0022f2c8 timeout_add_short + 416 -> 8 libdovecot.0.dylib 0x0022f574 io_add_to + 76 -> 9 dovecot 0x00007dd4 service_monitor_stop_close + 288 -> 10 dovecot 0x00008cdc services_monitor_start + 840 -> 11 dovecot 0x00004aa4 main + 3336 -> 12 dovecot 0x00003048 start + 68 ------------- dovecot -n: admin.MacPPC[/opt/local/var/log/dovecot] <467-7> $ sudo dovecot -n # 2.3.11.3 (): /opt/local/etc/dovecot/dovecot.conf # OS: Darwin 9.8.0 Power Macintosh hfs # Hostname: MacPPC.Dlink default_client_limit = 50 default_internal_group = _dovecot default_process_limit = 10 default_vsz_limit = 128 M info_log_path = /opt/local/var/log/dovecot/info listen = * log_path = /opt/local/var/log/dovecot/error login_plugin_dir = /opt/local/lib/dovecot mail_location = maildir:/private/srv/mail/%u namespace inbox { inbox = yes location = mailbox Drafts { special_use = \Drafts } mailbox Junk { special_use = \Junk } mailbox Sent { special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Trash { special_use = \Trash } prefix = } protocols = imap pop3 service imap { process_limit = 32 } service pop3 { process_limit = 32 } service submission { process_limit = 32 } ssl_cert = </etc/ssl/certs/dovecot.pem ssl_key = # hidden, use -P to show it userdb { driver = passwd } ------------------------------ Will be a very gratefull for the help, Oleg

1 0

Issue with dovecot v2.3.4.1 and mail_crypt plugin. Email received, but not encrypted on disk until moved out of root Maildir folder. IMAP child crashes when mail is read from folder message was moved to.
by Ben Burk 23 May '21

23 May '21

Recently I attempted enabling the mail_crypt plugin on a per user basis as summarized below: uname -a Linux smtp 4.19.0-16-amd64 #1 SMP Debian 4.19.181-1 (2021-03-19) x86_64 GNU/Linux dovecot --version 2.3.4.1 (f79e8e7e4) $ cat /etc/dovecot/conf.d/10-mailcrypt.conf mail_attribute_dict = file:%h/Maildir/dovecot-attributes mail_plugins = $mail_plugins mail_crypt plugin { mail_crypt_curve = secp521r1 mail_crypt_save_version = 2 mail_crypt_require_encrypted_user_key = yes } cat dovecot-sql.conf.ext driver = mysql connect = host=127.0.0.1 dbname=VVVVV user=WWWWWW password=XXXXXX user_query = SELECT user, \ concat('*:bytes=', quota) AS quota_rule, \ '/mail/%d/%n' AS home, \ uid, gid \ FROM virtual_users WHERE user='%u'; password_query = SELECT user, password, crypt as userdb_mail_crypt_save_version, '%w' AS userdb_mail_crypt_private_password FROM virtual_users WHERE user='%u'; dovecot -n # 2.3.4.1 (f79e8e7e4): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.4 () # OS: Linux 4.19.0-16-amd64 x86_64 Debian 10.9 # Hostname: smtp.burk.tech auth_verbose = yes mail_attribute_dict = file:%h/Maildir/dovecot-attributes mail_location = maildir:~/Maildir:LAYOUT=fs mail_plugins = quota mail_crypt mail_privileged_group = mail namespace inbox { inbox = yes location = mailbox Drafts { auto = subscribe special_use = \Drafts } mailbox Junk { auto = subscribe special_use = \Junk } mailbox Sent { auto = subscribe special_use = \Sent } mailbox Trash { auto = subscribe special_use = \Trash } prefix = type = private } passdb { driver = pam } plugin { mail_crypt_curve = secp521r1 mail_crypt_require_encrypted_user_key = # hidden, use -P to show it mail_crypt_save_version = 2 } protocols = imap service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0660 user = postfix } unix_listener auth-userdb { mode = 0777 } } service lmtp { unix_listener /var/spool/postfix/private/dovecot-lmtp { group = postfix mode = 0600 user = postfix } } ssl = required ssl_cert = </etc/dovecot/fullchain.cer.pem ssl_dh = # hidden, use -P to show it ssl_key = # hidden, use -P to show it ssl_min_protocol = TLSv1.2 ssl_prefer_server_ciphers = yes userdb { driver = passwd } verbose_ssl = yes protocol lmtp { hostname = smtp.burk.tech postmaster_address = postmaster(a)burk.tech } protocol imap { mail_max_userip_connections = 50 } The issue I've noticed occurs when the following settings above are enabled and mail is received into the root of the Maildir fs, then mail is moved to another folder (including a file being deleted). Upon a client's retrieval of messages from the folder where mail was moved to, the log spits out the following: May 22 19:18:15 smtp dovecot: imap-login: Login: user=<ben>, method=PLAIN, rip=XXX.XXX.XXX.XXX, lip=YYY.YYY.YYY.YYY, mpid=31682, TLS, session=<7oASZPPCkN9EdIVp> May 22 19:18:15 smtp dovecot: imap(ben)<31682><7oASZPPCkN9EdIVp>: Error: Mailbox Trash: Saving mail: save: read() failed: read(/mail/burk.tech/ben/Maildir/Receipts/cur/1621724316.M515979P30417.smtp,S=2903,W=2964:2,S) failed: Private key not available: Cannot decrypt key f9e7a6b9dd24535a29915fb46336047b07ae5b9fea5eda8e03cf9a8fa009f88b: Cannot decrypt key 876c6bfbc355a86c3c924a5841bb2e5c6e1b0c5496d5116c4fcb9c511f803c87: Password not available May 22 19:18:15 smtp dovecot: imap(ben)<31682><7oASZPPCkN9EdIVp>: Error: Mailbox Trash: copy: i_stream_read() failed: read(/mail/burk.tech/ben/Maildir/Receipts/cur/1621724316.M515979P30417.smtp,S=2903,W=2964:2,S) failed: Private key not available: Cannot decrypt key f9e7a6b9dd24535a29915fb46336047b07ae5b9fea5eda8e03cf9a8fa009f88b: Cannot decrypt key 876c6bfbc355a86c3c924a5841bb2e5c6e1b0c5496d5116c4fcb9c511f803c87: Password not available May 22 19:18:15 smtp dovecot: imap(ben)<31682><7oASZPPCkN9EdIVp>: Error: Mailbox Trash: Saving mail: read() failed: read(/mail/burk.tech/ben/Maildir/Receipts/cur/1621724316.M515979P30417.smtp,S=2903,W=2964:2,S) failed: Private key not available: Cannot decrypt key f9e7a6b9dd24535a29915fb46336047b07ae5b9fea5eda8e03cf9a8fa009f88b: Cannot decrypt key 876c6bfbc355a86c3c924a5841bb2e5c6e1b0c5496d5116c4fcb9c511f803c87: Password not available (read reason=) May 22 19:18:15 smtp dovecot: imap(ben)<31682><7oASZPPCkN9EdIVp>: Panic: file ostream-encrypt.c: line 631 (o_stream_encrypt_close): assertion failed: (estream->finalized || estream->ctx_sym == NULL || estream->ostream.ostream.stream_errno != 0) May 22 19:18:15 smtp dovecot: imap(ben)<31682><7oASZPPCkN9EdIVp>: Error: Raw backtrace: /usr/lib/dovecot/libdovecot.so.0(+0xdb73b) [0x7fdb3ce7273b] -> /usr/lib/dovecot/libdovecot.so.0(+0xdb7d1) [0x7fdb3ce727d1] -> /usr/lib/dovecot/libdovecot.so.0(+0x4a199) [0x7fdb3cde1199] -> /usr/lib/dovecot/libdovecot.so.0(+0x49276) [0x7fdb3cde0276] -> /usr/lib/dovecot/libdovecot.so.0(+0xffd5e) [0x7fdb3ce96d5e] -> /usr/lib/dovecot/libdovecot.so.0(o_stream_destroy+0x16) [0x7fdb3ce96d86] -> /usr/lib/dovecot/libdovecot-storage.so.0(maildir_save_finish+0x18d) [0x7fdb3cfa946d] -> /usr/lib/dovecot/libdovecot-storage.so.0(mailbox_save_cancel+0x4d) [0x7fdb3cf8167d] -> /usr/lib/dovecot/libdovecot-storage.so.0(mail_storage_copy+0x122) [0x7fdb3cf73f22] -> /usr/lib/dovecot/libdovecot-storage.so.0(+0x5badc) [0x7fdb3cf81adc] -> /usr/lib/dovecot/libdovecot-storage.so.0(mailbox_move+0x31) [0x7fdb3cf81c11] -> dovecot/imap(+0x128f5) [0x563bd267a8f5] -> dovecot/imap(command_exec+0x70) [0x563bd2687dc0] -> dovecot/imap(+0x1e3f2) [0x563bd26863f2] -> dovecot/imap(+0x1e494) [0x563bd2686494] -> dovecot/imap(client_handle_input+0x1b5) [0x563bd2686845] -> dovecot/imap(client_input+0x7e) [0x563bd2686d6e] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_call_io+0x6f) [0x7fdb3ce88bef] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0x136) [0x7fdb3ce8a1e6] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run+0x4c) [0x7fdb3ce88c8c] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_run+0x40) [0x7fdb3ce88df0] -> /usr/lib/dovecot/libdovecot.so.0(master_service_run+0x13) [0x7fdb3ce09123] -> dovecot/imap(main+0x325) [0x563bd2678bf5] -> /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xeb) [0x7fdb3cbf209b] -> dovecot/imap(_start+0x2a) [0x563bd2678d8a] May 22 19:18:15 smtp dovecot: imap-login: Debug: SSL alert: close notify May 22 19:18:15 smtp dovecot: imap(ben)<31682><7oASZPPCkN9EdIVp>: Fatal: master: service(imap): child 31682 killed with signal 6 (core dumps disabled - https://dovecot.org/bugreport.html#coredumps) My keys for the user are as follows: ben(a)smtp.burk.tech :~$ doveadm mailbox cryptokey list -U doveadm(ben): Error: net_connect_unix(/var/run/dovecot/stats-writer) failed: Permission denied Folder Active Public ID yes 876c6bfbc355a86c3c924a5841bb2e5c6e1b0c5496d5116c4fcb9c511f803c87 I've checked and it appears that the mail as its received into the root of Maildir is not initially encrypted. It is stored plaintext. However, when the mail is moved, it is then properly encrypted. ben(a)smtp.burk.tech :~/Maildir/cur$ file 1621726534.31820_1.smtp\:2\, 1621726534.31820_1.smtp:2,: SMTP mail, ASCII text ben(a)smtp.burk.tech :~/Maildir/Receipts/cur$ file 1621726595.M343917P30832.smtp\,S\=2927\,W\=2988\:2\,S 1621726595.M343917P30832.smtp,S=2927,W=2988:2,S: MailCrypt -- Ben Burk BURK.TECH System Administrator

1 0

Dovecot Subfolder Always Uses dot separator with mdbox
by Steven Smith 22 May '21

22 May '21

I’m trying to configure dovecot to use mailbox subfolders that look like both foo/bar on the IMAP client and the filesystem. But the subfolders created all look like foo.bar, not foo/bar with a proper nesting structure. This also happens when the folder ‘bar’ is moved into the folder ‘foo’—A new folder `foo.bar’ is created. I believe that i’m following the configuration rules at https://wiki.dovecot.org/MailboxFormat/Maildir#Maildir_and_filesystems and https://wiki.dovecot.org/MailLocation/Maildir. This issue happens whether I set separator to its default, ‘.’, or ‘/’: > mail_location = mdbox:/private/var/mail/tld.hostname.mail/%Ln/mdbox:LAYOUT=fs > namespace inbox { > … > separator = / > … > } The IMAP client is macOS Mail.app version 14.0. I’d greatly appreciate any help or pointers to fix this configuration issue. dovecot -n > # 2.3.13 (): /opt/local/etc/dovecot/dovecot.conf > # Pigeonhole version 0.5.13 () > # OS: Darwin 20.4.0 x86_64 apfs > # Hostname: mail.hostname.tld > aps_topic = com.apple.mail.XServer.ffffffff-ffff-fff-ffffffffff > auth_cache_size = 10 M > auth_gssapi_hostname = $ALL > auth_krb5_keytab = /opt/local/etc/dovecot/imap.keytab > auth_mechanisms = plain gssapi > auth_realms =mail.hostname.tld > auth_socket_path = /opt/local/var/run/dovecot/auth-userdb > auth_username_format = %Ln > debug_log_path = /opt/local/var/log/mail/mail-debug.log > disable_plaintext_auth = no > first_valid_gid = 6 > first_valid_uid = 6 > imap_id_log = * > imap_id_send = "name" * "version" * > imap_idle_notify_interval = 29 mins > imap_urlauth_submit_user = submit > info_log_path = /opt/local/var/log/mail/mail-info.log > last_valid_gid = 100 > lda_mailbox_autocreate = yes > log_path = /opt/local/var/log/mail/mail-err.log > login_log_format_elements = user=<%u> method=%m rip=%r lip=%l mpid=%e %c > mail_access_groups = mail > mail_attachment_dir = /private/var/mail/tld.hostname.mail/attachments > mail_attachment_fs = sis posix:mode=0666 > mail_gid = mail > mail_home = /private/var/mail/tld.hostname.mail > mail_location = mdbox:/private/var/mail/tld.hostname.mail/%Ln/mdbox:LAYOUT=fs > mail_log_prefix = "%s(pid %p user %u): " > mail_plugins = quota zlib acl fts fts_solr fts_lucene > mail_privileged_group = mail > mail_uid = _dovecot > managesieve_notify_capability = mailto > managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date index ihave duplicate mime foreverypart extracttext imapsieve vnd.dovecot.imapsieve > mdbox_rotate_size = 200 M > namespace inbox { > inbox = yes > location = > mailbox Archive { > auto = subscribe > special_use = \Archive > } > mailbox Drafts { > auto = subscribe > special_use = \Drafts > } > mailbox Junk { > auto = create > special_use = \Junk > } > mailbox Notspam_train { > auto = create > special_use = \Junk > } > mailbox Sent { > auto = subscribe > special_use = \Sent > } > mailbox "Sent Messages" { > special_use = \Sent > } > mailbox Spam_train { > auto = create > special_use = \Junk > } > mailbox Trash { > auto = create > special_use = \Trash > } > prefix = > separator = / > } > passdb { > driver = pam > name = pam > } > plugin { > fts = solr > fts_autoindex = yes > fts_autoindex_exclude = \Junk > fts_solr = url=http://127.0.0.1:8983/solr/dovecot/ > imapsieve_mailbox1_before = file:/opt/local/etc/dovecot/sieve/report-spam.sieve > imapsieve_mailbox1_causes = COPY APPEND > imapsieve_mailbox1_name = Spam_train > imapsieve_mailbox2_before = file:/opt/local/etc/dovecot/sieve/report-ham.sieve > imapsieve_mailbox2_causes = COPY APPEND > imapsieve_mailbox2_name = Notspam_train > mail_log_events = delete undelete expunge copy mailbox_delete mailbox_rename > mail_log_fields = uid box msgid from subject size flags > quota_grace = 10%% > quota_rule = *:storage=16G > quota_rule2 = Trash:storage=+256M > quota_warning = storage=100%% quota-exceeded %u > quota_warning2 = storage=80%% quota-warning %u > recipient_delimiter = + > sieve = /private/var/mail/tld.hostname.mail/rules/%Ln/dovecot.sieve > sieve_after = /opt/local/etc/dovecot/sieve-after.d > sieve_before = /opt/local/etc/dovecot/sieve-before.d > sieve_dir = /private/var/mail/tld.hostname.mail/rules/%Ln/%u > sieve_global_extensions = +vnd.dovecot.pipe +vnd.dovecot.environment > sieve_pipe_bin_dir = /opt/local/etc/dovecot/sieve > sieve_plugins = sieve_imapsieve sieve_extprograms > sieve_quota_max_storage = 50M > } > postmaster_address = postmaster(a)hostname.tld > protocols = imap lmtp sieve > quota_full_tempfail = yes > sendmail_path = /opt/local/sbin/sendmail > service auth-worker { > group = mail > user = root > } > service auth { > extra_groups = _keytabusers > idle_kill = 15 mins > unix_listener /opt/local/var/spool/postfix/private/auth { > group = mail > mode = 0660 > user = _postfix > } > } > service dns-client { > unix_listener dns-client { > mode = 0600 > } > } > service imap-login { > inet_listener imap { > address = 127.0.0.1, ::1 > port = 143 > } > inet_listener imaps { > port = 993 > ssl = yes > } > process_min_avail = 6 > service_count = 0 > vsz_limit = 2 G > } > service imap { > process_limit = 200 > process_min_avail = 6 > } > service lmtp { > unix_listener /opt/local/var/spool/postfix/private/dovecot-lmtp { > group = mail > mode = 0660 > user = _postfix > } > } > ssl = required > ssl_ca = </opt/local/etc/certificates/cert.chain.pem > ssl_cert = </opt/local/etc/certificates/cert.cert.pem > ssl_cipher_list = ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256 > ssl_dh = # hidden, use -P to show it > ssl_key = # hidden, use -P to show it > ssl_min_protocol = TLSv1.2 > ssl_prefer_server_ciphers = yes > userdb { > driver = passwd > name = passwd > } > verbose_proctitle = yes > protocol lda { > mail_fsync = optimized > mail_plugins = quota zlib acl fts fts_solr fts_lucene sieve push_notify > } > protocol imap { > mail_max_userip_connections = 50 > mail_plugins = quota zlib acl fts fts_solr fts_lucene imap_acl imap_quota imap_zlib imap_sieve > } > protocol lmtp { > mail_fsync = optimized > mail_plugins = quota zlib acl fts fts_solr fts_lucene sieve > }

1 0

Dovecot v2.3.13 reporting (very) incorrect vsize for some maildir folders
by Eirik Rye 22 May '21

22 May '21

Hello! Dovecot v2.3.13. Full, but anonymized, `doveconf -n` attached. We are in the process of migrating maildir-backed users from filesystem quotes, to using dovecot's "count" quota backend. This is not reflected in the doveconf output because we're overriding `quota`, `quota_rule` and `quota_vsizes` in userdb: {"quota":"count:User quota","quota_rule":"*:storage=15G","quota_vsizes":"yes"} Afterwards, for a couple users, we received reports that mail delivery had failed because they were over quota. When looking into it for a specific user, we noticed that the vsize reported for a particular folder (with 47k messages) was reported as being nearly 50 times larger than it's on-disk size: root@mail02:~# doveadm mailbox status -u anonymized_user 'messages recent unseen vsize' 'anonymized/folder/name' [...] anonymized/folder/name messages=47338 recent=0 unseen=0 vsize=14335366070 However, the filesystem itself reports a much smaller size (but correct message count): root@mail02:~# du -hd1 /home/anonymized_user/Maildir/.anonymized.folder.name/ 313M /home/anonymized_user/Maildir/.anonymized.folder.name/cur 36K /home/anonymized_user/Maildir/.anonymized.folder.name/tmp 4.0K /home/anonymized_user/Maildir/.anonymized.folder.name/new 320M /home/anonymized_user/Maildir/.anonymized.folder.name/ root@mail02:~# ls /home/anonymized_user/Maildir/.anonymized.folder.name/cur | wc -l 47338 I have tried: - `doveadm force-resync -u anonymized_user` - deleting the index files in the specific folder, and running `doveadm index -u anonymized_user '*'` as well as `doveadm mailbox status -u anonymized_user vsize '*'` - deleting all `*index*` files in maildir, and running `doveadm index -u anonymized_user '*'` as well as `doveadm mailbox status -u anonymized_user vsize '*'` - comparing all maildir-sizes (S=) with their actual sizes to see if there are discrepancies. There are none. - regardless of the above, set `maildir_broken_filename_sizes = yes`, deleted indexes and reindexed. Even after deleting the list index (dovecot.list.index) as well as the mailbox indexes, recalculating the vsize seems very quick so I feel like the incorrect vsize is being fetched from a cache somewhere instead of being recalculated..? Any idea what is causing dovecot to report this wildly incorrect mailbox size? Are there any other files (not matching `*index*`) that are responsible? I'd rather not touch the user's control files, for obvious reasons. On a side note: We're also experiencing some issues with `mail_vsize_bg_after_count`. It seems to work correctly by returning a temporary error and deferring to a background job, but the indexer-worker job often times never appears to start (or do anything) at all: dovecot 29622 0.0 0.0 4120 1124 ? S 15:22 0:00 dovecot/indexer [0 clients, 0 requests] 266248 29623 0.0 0.0 6008 4604 ? S 15:22 0:00 dovecot/indexer-worker [idling] Waiting a while, and attempting to refetch the quota returns the same temperror with no indexer-worker being started. However, this is a separate issue from the above and can be ignored for now. Best regards, Eirik Rye

4 11

director & backend on same server with director_proxy_maybe
by lucas.raynaud＠ircf.fr 21 May '21

21 May '21

Hello, I've 2 mail servers, as test server, with dovecot as backend and setup pop3 and imap connections and NFS. For prevent issues with simultaneous connections I want to setup up Director on the same VM and on the same instance as the backend Dovecot. I found in the documentation that this configuration is broken, but can work with development, and after research on the internet and on the questions encountered previously as on : https://dovecot.org/pipermail/dovecot/2015-July/101483.html https://dovecot.org/pipermail/dovecot/2011-September/130939.html https://dovecot.org/pipermail/dovecot/2012-June/136535.html I find it quite unclear if this is really possible with director_proxy_maybe, which according to the changelog, allows this setup to work. Today I've reached this level with those errors: IPs : mail4 : XX.XX.111.8 mail3 : XX.XX.51.247 doveadm director ring status director ip port type last failed status // on mail3 XX.XX.51.247 9090 self never synced XX.XX.111.8 9090 l+r never synced doveadm director status lucas.raynaud(a)ircf.fr Current: 5.196.111.8 (expires 2021-05-21 10:48:51) Hashed: 5.196.111.8 Initial config: login with lucas.raynaud(a)ircf.fr on mail4 mail log on mail4 May 21 10:51:52 mail4 dovecot: auth-worker(12917): Debug: sql(lucas.raynaud(a)ircf.fr,XX.XX.111.8,<4h3SK9PCYsIFxG8I>): query: SELECT password, 'y' as proxy_maybe, 'y' as director_proxy_maybe FROM mail_user WHERE (login = 'lucas.raynaud(a)ircf.fr' OR email = 'lucas.raynaud(a)ircf.fr') AND disableimap = 'n' AND server_id = '8' May 21 10:51:52 mail4 dovecot: auth: Debug: client passdb out: OK#0111#011user=lucas.raynaud@ircf.fr#011director_proxy_maybe=y#011lip=XX.XX.111.8#011lport=143#011proxy#011pass=x9Im.bprP!CWzbgQ May 21 10:51:52 mail4 dovecot: imap-login: Debug: Ignoring unknown passdb extra field: director_proxy_maybe May 21 10:51:52 mail4 dovecot: imap-login: Debug: Ignoring unknown passdb extra field: lip May 21 10:51:52 mail4 dovecot: imap-login: Debug: Ignoring unknown passdb extra field: lport May 21 10:51:52 mail4 dovecot: imap-login: Error: proxy: host not given: user=<lucas.raynaud(a)ircf.fr>, method=PLAIN, rip=XX.XX.111.8, lip=XX.XX.111.8, secured, session=<4h3SK9PCYsIFxG8I> May 21 10:51:52 mail4 dovecot: imap-login: Disconnected (internal failure, 1 successful auths): user=<lucas.raynaud(a)ircf.fr>, method=PLAIN, rip=XX.XX.111.8, lip=XX.XX.111.8, secured, session=<4h3SK9PCYsIFxG8I> no log on mail3 login with lucas.raynaud(a)ircf.fr on mail3 mail log on mail3 May 21 10:55:07 mail3 dovecot: auth-worker(19907): Debug: sql(lucas.raynaud(a)ircf.fr,XX.XX.51.247,<Hh5yN9PCRtAFxDP3>): query: SELECT password, 'y' as proxy_maybe, 'y' as director_proxy_maybe FROM mail_user WHERE (login = 'lucas.raynaud(a)ircf.fr' OR email = 'lucas.raynaud(a)ircf.fr') AND disableimap = 'n' AND server_id = '8' May 21 10:55:07 mail3 dovecot: auth: Debug: client passdb out: OK#0111#011user=lucas.raynaud@ircf.fr#011director_proxy_maybe=y#011lip=XX.XX.51.247#011lport=143#011proxy#011pass=x9Im.bprP!CWzbgQ May 21 10:55:07 mail3 dovecot: imap-login: Debug: Ignoring unknown passdb extra field: director_proxy_maybe May 21 10:55:07 mail3 dovecot: imap-login: Debug: Ignoring unknown passdb extra field: lip May 21 10:55:07 mail3 dovecot: imap-login: Debug: Ignoring unknown passdb extra field: lport May 21 10:55:07 mail3 dovecot: imap-login: proxy(lucas.raynaud(a)ircf.fr): Login failed to XX.XX.111.8:143: [UNAVAILABLE] Account is temporarily unavailable.: user=<lucas.raynaud(a)ircf.fr>, method=PLAIN, rip=XX.XX.51.247, lip=XX.XX.51.247, secured, session=<Hh5yN9PCRtAFxDP3> May 21 10:55:07 mail3 dovecot: imap-login: Disconnected (proxy dest auth failed): user=<lucas.raynaud(a)ircf.fr>, method=PLAIN, rip=XX.XX.51.247, lip=XX.XX.51.247, secured, session=<Hh5yN9PCRtAFxDP3> mail log on mail4 May 21 10:55:07 mail4 dovecot: auth-worker(13096): Debug: sql(lucas.raynaud(a)ircf.fr,XX.XX.51.247,<rI10N9PCyKsFxDP3>): query: SELECT password, 'y' as proxy_maybe, 'y' as director_proxy_maybe FROM mail_user WHERE (login = 'lucas.raynaud(a)ircf.fr' OR email = 'lucas.raynaud(a)ircf.fr') AND disableimap = 'n' AND server_id = '8' May 21 10:55:07 mail4 dovecot: auth: Debug: client passdb out: OK#0111#011user=lucas.raynaud@ircf.fr#011director_proxy_maybe=y#011lip=XX.XX.111.8#011lport=143#011proxy#011pass=x9Im.bprP!CWzbgQ May 21 10:55:07 mail4 dovecot: imap-login: Debug: Ignoring unknown passdb extra field: director_proxy_maybe May 21 10:55:07 mail4 dovecot: imap-login: Debug: Ignoring unknown passdb extra field: lip May 21 10:55:07 mail4 dovecot: imap-login: Debug: Ignoring unknown passdb extra field: lport May 21 10:55:07 mail4 dovecot: imap-login: Error: proxy: host not given: user=<lucas.raynaud(a)ircf.fr>, method=PLAIN, rip=XX.XX.51.247, lip=XX.XX.111.8, session=<rI10N9PCyKsFxDP3> May 21 10:55:07 mail4 dovecot: imap-login: Disconnected (internal failure, 1 successful auths): user=<lucas.raynaud(a)ircf.fr>, method=PLAIN, rip=XX.XX.51.247, lip=XX.XX.111.8, session=<rI10N9PCyKsFxDP3> sql query : password_query = SELECT password, 'y' as proxy_maybe, 'y' as director_proxy_maybe FROM mail_user WHERE (login = '%u' OR email = '%u') AND disable%Ls = 'n' AND server_id = '8' It seems that Director is working but not adding the "host" extra field when it should, also it's strange that the director_proxy_maybe is unknown. Is it really possible to configure director on same instance as backend? Is director_proxy_maybe working? Also do you have answers about my problems? Thanks for advance. Lucas ############ mail3's and mail4's configs are the same. dovecot -n # 2.2.27 (): /etc/dovecot/dovecot.conf # Pigeonhole version 0.4.16 () # OS: Linux 4.9.0-14-amd64 x86_64 Debian 9.13 auth_debug = yes auth_debug_passwords = yes auth_mechanisms = plain login auth_proxy_self = XX.XX.111.8 auth_verbose = yes dict { quota = mysql:/etc/dovecot/dovecot-dict-sql.conf.ext } director_mail_servers = XX.XX.111.8 XX.XX.51.247 director_servers = XX.XX.111.8 XX.XX.51.247 director_user_expire = 5 mins disable_plaintext_auth = no doveadm_port = 24245 mail_location = mbox:~/mail:INBOX=/var/mail/%u mail_plugins = " quota" mail_privileged_group = vmail managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date index ihave duplicate mime foreverypart extracttext namespace inbox { inbox = yes location = mailbox Drafts { special_use = \Drafts } mailbox Junk { special_use = \Junk } mailbox Sent { special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Trash { special_use = \Trash } prefix = } passdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } plugin { quota = dict:user::file:/var/vmail/%d/%n/.quotausage quota_warning = storage=90%% quota-warning 90 %u sieve = /var/vmail/%d/%n/.sieve sieve_after = /etc/dovecot/sieve/after.d sieve_before = /var/vmail/%d/%n/sieve sieve_dir = /var/vmail/%d/%n/sieve/ sieve_global_dir = /etc/dovecot/sieve } pop3_reuse_xuidl = yes pop3_save_uidl = yes pop3_uidl_format = UID%u-%v protocols = " imap sieve pop3" service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0660 user = postfix } unix_listener auth-userdb { group = vmail mode = 0600 user = vmail } } service director { fifo_listener login/proxy-notify { mode = 0666 user = $default_login_user } inet_listener { port = 9090 } unix_listener director-userdb { mode = 0600 } unix_listener login/director { mode = 0666 } } service doveadm { inet_listener { port = 24245 } } service imap-login { executable = imap-login director inet_listener imap { port = 143 } } service ipc { unix_listener ipc { user = dovecot } } service pop3-login { executable = pop3-login director inet_listener pop3 { port = 110 } } service quota-warning { executable = script /usr/local/bin/mail-scripts/quota-warning.sh unix_listener quota-warning { group = vmail mode = 0660 user = vmail } user = vmail } ssl_cert = </opt/ssl/ircf.crt ssl_key = # hidden, use -P to show it userdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } protocol lmtp { auth_socket_path = director-userdb } protocol doveadm { auth_socket_path = director-userdb } protocol lda { mail_plugins = " quota sieve quota" } protocol imap { auth_socket_path = director-userdb mail_max_userip_connections = 16 mail_plugins = " quota quota imap_quota" } protocol pop3 { auth_socket_path = director-userdb mail_max_userip_connections = 16 mail_plugins = " quota quota" } local 10.10.10.0/24 { doveadm_password = # hidden, use -P to show it }

1 0

Re: WG: blocking - sql(acastus@example.ch,IP): unknown user
by mauric＠gmx.ch 20 May '21

20 May '21

>Hi! >You can try auth_policy_server such as weakforced. See <https://github.com/PowerDNS/weakforced> https://github.com/PowerDNS/weakforced and <https://doc.dovecot.org/configuration_manual/authentication/auth_policy/#au thentication-auth-policy> https://doc.dovecot.org/configuration_manual/authentication/auth_policy/#aut hentication-auth-policy >Aki And this Weakforced, i dont found for Debian Booster, so I have try to install but this need other meny requirements pakage, so please this are also possible as package for Debian? here any running with this this setup? I don't found any example on the net... or you using fail2ban? Mauri

1 0

Sendmail and Doecot
by Stephane Magnier 20 May '21

20 May '21

Hi, I am using Dovecot v 2.2.32 and Sendmail 8.15.2 My "folder" config on Dovecot is : mbox:/var/spool2/%u/mail:LAYOUT=fs:INBOX=/var/spool/mail/%u But in fact, any email arriving into the mailbox, stays in Sendmail into the file location (by default) : /var/spool/mail/user1 and any folder created, can be reached via Dovecot and is located to /var/spool2/user1 If I want to backup the user1's emails, I need to backup the "dovecot" location ( /var/spool2/user1) but also the Sendmail file location ( /var/spool/mail/user1) If I don't do that, I loose fresh emails which are still into the Sendmail directory, which are not copied into the Dovecot location.. Sounds weird I would expect to backup only my Dovecot directory and my email client should see only the Dovecot directory I would expect to have small sendmail email file user ( /var/spool/mail/user1 ) and i should't car about these files. Everything should be copied automatically into my Dovecot location what do you think ? Best regards, Stéve

3 2

blocking - sql(acastus@example.ch,IP): unknown user
by mauric＠gmx.ch 19 May '21

19 May '21

hello running with following Setup booster, postfix, Dovecot, mysql and meny other nice tools searching for solutions I see meny other running with same questions like this, so please what i need to read or setup that i don't receive so many failed logon try? "unknown user" i see, meny "fix" this fail2ban, but iam shure that Dovecot has also any solution for this? so friendly asking how to close this request from trying for failed logon. May 14 time Dovecot/auth-worker(8075): Debug: Loading modules from directory: /usr/lib/dovecot/modules/auth May 14 time Dovecot/auth-worker(8075): Debug: Module loaded: /usr/lib/dovecot/modules/auth/lib20_auth_var_expand_crypt.so May 14 time Dovecot/auth-worker(8075): Debug: Module loaded: /usr/lib/dovecot/modules/auth/libdriver_mysql.so May 14 time Dovecot/auth-worker(8043): Debug: sql(acastus(a)example.ch,IP): query: SELECT username AS user, password, '/folder/example.ch/acastus' AS userdb_home, '10000' AS userdb_uid, '10000' AS userdb_gid, CONCAT('maildir:storage=', (quota*1024)) as userdb_quota FROM mailbox WHERE username='acastus(a)example.ch' AND active = 1 May 14 time Dovecot/auth-worker(8026): Info: sql(acastus(a)example.ch,IP): unknown user thanks Mauri

3 2

Separating Dovecot and Postfix
by White, Daniel E. (GSFC-770.0)[NICS] 14 May '21

14 May '21

I am struggling to update a very old set of mail servers. Some are supposed to be relays (MTAs by my understanding) while others are where the mailboxes live (MDA) In rebuilding the MDA servers, is postfix required on the same server or can dovecot connect to postfix on a separate MTA server ? The old MDAs have both installed, but the config files are a mess.

3 4

lmtp(5672): Fatal: master: service(lmtp): child 5672 killed with signal 11 (core dumped)
by Alex 14 May '21

14 May '21

Hi Sometimes I see such lines in the logs May 10 23:15:31 mail dovecot[374]: lmtp(452): Fatal: master: service(lmtp): child 452 killed with signal 11 (core not dumped - https://dovecot.org/bugreport.html#coredumps - set /proc/sys/fs/suid_dumpable to 2) May 12 18:50:19 mail dovecot[374]: lmtp(3533): Fatal: master: service(lmtp): child 3533 killed with signal 11 (core not dumped - https://dovecot.org/bugreport.html#coredumps - set /proc/sys/fs/suid_dumpable to 2) May 13 17:21:34 mail dovecot[4910]: lmtp(5672): Fatal: master: service(lmtp): child 5672 killed with signal 11 (core dumped) and postfix logs: postfix/lmtp[28025]: 502DA17E1BC3: to=<email(a)domain.com>, relay=1.0.1.1[1.0.1.1]:11111, delay=0.78, delays=0.69/0/0.09/0, dsn=4.4.2, status=deferred (lost connection with 1.0.1.1[1.0.1.1] while receiving the initial server greeting) It was the spam message This error was in some previous versions too Information for debugging: dovecot is working in lxc container with Centos 8 in Proxmox 5.4.101-1-pve #1 SMP PVE 5.4.101-1 (Fri, 26 Feb 2021 13:13:09 +0100) x86_64 x86_64 x86_64 GNU/Linux # gdb /usr/libexec/dovecot/lmtp 'core-lmtp-5672-!usr!libexec!dovecot!lmtp' GNU gdb (GDB) Red Hat Enterprise Linux 8.2-12.el8 Copyright (C) 2018 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-redhat-linux-gnu". Type "show configuration" for configuration details. For bug reporting instructions, please see: <http://www.gnu.org/software/gdb/bugs/>. Find the GDB manual and other documentation resources online at: <http://www.gnu.org/software/gdb/documentation/>. For help, type "help". Type "apropos word" to search for commands related to "word"... Reading symbols from /usr/libexec/dovecot/lmtp...Reading symbols from /usr/lib/debug/usr/libexec/dovecot/lmtp-2.3.14-1.0.rhel8.x86_64.debug...done. done. [New LWP 5672] [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib64/libthread_db.so.1". Core was generated by `dovecot/lmtp'. Program terminated with signal SIGSEGV, Segmentation fault. #0 __strlen_sse2 () at ../sysdeps/x86_64/multiarch/../strlen.S:120 120 movdqu (%rax), %xmm4 (gdb) bt #0 __strlen_sse2 () at ../sysdeps/x86_64/multiarch/../strlen.S:120 #1 0x00007fbc3f65725b in p_strdup (pool=0x5620ae47d3e0, str=0x8 <error: Cannot access memory at address 0x8>) at strfuncs.c:51 #2 0x00007fbc3f5b292a in setting_copy () at settings-parser.c:1538 #3 0x00007fbc3f5b2d8a in settings_dup_full () at settings-parser.c:1600 #4 0x00007fbc3f9547ba in mail_user_alloc (parent_event=0x0, username=0x7fbc3fa0b24a "raw mail user", set_info=0x5620ae46e458, set=0x5620ae430220) at mail-user.c:113 #5 0x00007fbc3f9a1dc5 in raw_storage_create_from_set (set_info=<optimized out>, set=<optimized out>) at raw-storage.c:25 #6 0x00005620ad66769a in client_raw_user_create (client=0x5620ae4aa8b8, client=0x5620ae4aa8b8) at lmtp-client.c:105 #7 client_create (fd_in=17, fd_out=17, conn=0x7fff7071af50) at lmtp-client.c:177 #8 0x00007fbc3f5acc99 in master_service_client_connection_callback (service=0x5620ae427130, conn=0x7fff7071af50) at master-service.c:980 #9 0x00007fbc3f5ad015 in master_service_listen (l=0x5620ae427610) at master-service.c:1212 #10 0x00007fbc3f63904d in io_loop_call_io (io=0x5620ae5032b0) at ioloop.c:714 #11 0x00007fbc3f63a679 in io_loop_handler_run_internal (ioloop=ioloop@entry=0x5620ae4272d0) at ioloop-epoll.c:222 #12 0x00007fbc3f6390f0 in io_loop_handler_run (ioloop=0x5620ae4272d0) at ioloop.c:766 #13 0x00007fbc3f639268 in io_loop_run (ioloop=0x5620ae4272d0) at ioloop.c:739 #14 0x00007fbc3f5ac557 in master_service_run (service=0x5620ae427130, callback=callback@entry=0x5620ad666fa0 <client_connected>) at master-service.c:853 #15 0x00005620ad666dcd in main (argc=<optimized out>, argv=<optimized out>) at main.c:168 (gdb) bt full #0 __strlen_sse2 () at ../sysdeps/x86_64/multiarch/../strlen.S:120 No locals. #1 0x00007fbc3f65725b in p_strdup (pool=0x5620ae47d3e0, str=0x8 <error: Cannot access memory at address 0x8>) at strfuncs.c:51 mem = <optimized out> len = <optimized out> #2 0x00007fbc3f5b292a in setting_copy () at settings-parser.c:1538 strlist_info = {module_name = 0x0, defines = 0x0, defaults = 0x0, type_offset = 18446744073709551615, struct_size = 0, parent_offset = 18446744073709551615, parent = 0x0, check_func = 0x0, expand_check_func = 0x0, dependencies = 0x0, dynamic_parsers = 0x0} #3 0x00007fbc3f5b2d8a in settings_dup_full () at settings-parser.c:1600 strlist_info = {module_name = 0x0, defines = 0x0, defaults = 0x0, type_offset = 18446744073709551615, struct_size = 0, parent_offset = 18446744073709551615, parent = 0x0, check_func = 0x0, expand_check_func = 0x0, dependencies = 0x0, dynamic_parsers = 0x0} #4 0x00007fbc3f9547ba in mail_user_alloc (parent_event=0x0, username=0x7fbc3fa0b24a "raw mail user", set_info=0x5620ae46e458, set=0x5620ae430220) at mail-user.c:113 pool = 0x5620ae47d3e0 #5 0x00007fbc3f9a1dc5 in raw_storage_create_from_set (set_info=<optimized out>, set=<optimized out>) at raw-storage.c:25 user = <optimized out> ns = <optimized out> ns_set = <optimized out> mail_set = <optimized out> error = 0x7fff7071af50 "\021" #6 0x00005620ad66769a in client_raw_user_create (client=0x5620ae4aa8b8, client=0x5620ae4aa8b8) at lmtp-client.c:105 sets = <optimized out> sets = <optimized out> #7 client_create (fd_in=17, fd_out=17, conn=0x7fff7071af50) at lmtp-client.c:177 rcpt_param_extensions = {0x5620ad66be6b "XRCPTFORWARD", 0x0} cap_rcpt_forward = {name = 0x5620ad66be6b "XRCPTFORWARD", params = 0x0} workarounds = <optimized out> lmtp_set = {protocol = SMTP_PROTOCOL_SMTP, capabilities = SMTP_CAPABILITY_NONE, workarounds = (unknown: 1886498356), hostname = 0x5620ae426760 "", login_greeting = 0x1 <error: Cannot access memory at address 0x1>, rawlog_dir = 0x0, ssl = 0x0, max_client_idle_time_msecs = 1886498432, max_pipelined_commands = 32767, max_bad_commands = 1062726285, max_recipients = 32700, command_limits = {max_parameters_size = 94698362529624, max_auth_size = 140446494082554, max_data_size = 140735079886496}, max_message_size = 94698362822992, mail_param_extensions = 0x2ae426758, rcpt_param_extensions = 0x7fff7071ae34, xclient_extensions = 0x7071aec0, socket_send_buffer_size = 15936827190723348992, socket_recv_buffer_size = 11513522008, event_parent = 0x5620ae46e150, debug = false, auth_optional = false, tls_required = false, mail_path_allow_broken = false, rcpt_domain_optional = false} client = 0x5620ae4aa8b8 pool = <optimized out> #8 0x00007fbc3f5acc99 in master_service_client_connection_callback (service=0x5620ae427130, conn=0x7fff7071af50) at master-service.c:980 No locals. #9 0x00007fbc3f5ad015 in master_service_listen (l=0x5620ae427610) at master-service.c:1212 service = 0x5620ae427130 conn = {fd = 17, listen_fd = 10, name = 0x5620ae4276c0 "lmtp", remote_ip = {family = 2, u = {ip6 = {__in6_u = {__u6_addr8 = "\n\000\003e", '\000' <repeats 11 times>, __u6_addr16 = {10, 25859, 0, 0, 0, 0, 0, 0}, __u6_addr32 = {1694695434, 0, 0, 0}}}, ip4 = {s_addr = 1694695434}}}, local_ip = {family = 2, u = {ip6 = {__in6_u = {__u6_addr8 = "\n\000\n\a", '\000' <repeats 11 times>, __u6_addr16 = {10, 1802, 0, 0, 0, 0, 0, 0}, __u6_addr32 = {118095882, 0, 0, 0}}}, ip4 = {s_addr = 118095882}}}, remote_port = 50660, local_port = 24, real_remote_ip = {family = 2, u = { ip6 = {__in6_u = {__u6_addr8 = "\n\000\003e", '\000' <repeats 11 times>, __u6_addr16 = {10, 25859, 0, 0, 0, 0, 0, 0}, __u6_addr32 = {1694695434, 0, 0, 0}}}, ip4 = {s_addr = 1694695434}}}, real_local_ip = {family = 2, u = {ip6 = {__in6_u = {__u6_addr8 = "\n\000\n\a", '\000' <repeats 11 times>, __u6_addr16 = {10, 1802, 0, 0, 0, 0, 0, 0}, __u6_addr32 = {118095882, 0, 0, 0}}}, ip4 = { s_addr = 118095882}}}, real_remote_port = 50660, real_local_port = 24, proxy = {hostname = 0x0, cert_common_name = 0x0, alpn = 0x0, alpn_size = 0, ssl = false, ssl_client_cert = false}, proxied = false, fifo = false, ssl = false, accepted = true} #10 0x00007fbc3f63904d in io_loop_call_io (io=0x5620ae5032b0) at ioloop.c:714 ioloop = 0x5620ae4272d0 t_id = 2 __func__ = "io_loop_call_io" #11 0x00007fbc3f63a679 in io_loop_handler_run_internal (ioloop=ioloop@entry=0x5620ae4272d0) at ioloop-epoll.c:222 ctx = 0x5620ae42c5f0 events = <optimized out> event = 0x5620ae42c670 --Type <RET> for more, q to quit, c to continue without paging--c list = 0x5620ae43adc0 io = <optimized out> tv = {tv_sec = 2147483, tv_usec = 0} events_count = <optimized out> msecs = <optimized out> ret = <optimized out> i = 0 j = <optimized out> call = <optimized out> __func__ = "io_loop_handler_run_internal" #12 0x00007fbc3f6390f0 in io_loop_handler_run (ioloop=0x5620ae4272d0) at ioloop.c:766 __func__ = "io_loop_handler_run" #13 0x00007fbc3f639268 in io_loop_run (ioloop=0x5620ae4272d0) at ioloop.c:739 __func__ = "io_loop_run" #14 0x00007fbc3f5ac557 in master_service_run (service=0x5620ae427130, callback=callback@entry=0x5620ad666fa0 <client_connected>) at master-service.c:853 No locals. #15 0x00005620ad666dcd in main (argc=<optimized out>, argv=<optimized out>) at main.c:168 set_roots = {0x5620ad86e640 <smtp_submit_setting_parser_info>, 0x5620ad86e580 <lda_setting_parser_info>, 0x5620ad86e2a0 <lmtp_setting_parser_info>, 0x0} service_flags = <optimized out> storage_service_flags = (MAIL_STORAGE_SERVICE_FLAG_USERDB_LOOKUP | MAIL_STORAGE_SERVICE_FLAG_TEMP_PRIV_DROP | MAIL_STORAGE_SERVICE_FLAG_NO_LOG_INIT | MAIL_STORAGE_SERVICE_FLAG_NO_IDLE_TIMEOUT) tmp_base_dir = 0x5620ae41e758 "" c = <optimized out> error = 0x7fff707492d8 ""

2 2

Outlook creating IMAP folders even though forbidden by ACLs
by Matt Grant 13 May '21

13 May '21

Hi! Is it well known that Outlook cannot process RFC 2086 or RFC 4134 ACLs? We are using Outlook 2013, 2016 and 2019, and with 2013 can definitely create shared folders with content that are not saved to the server, even though Outlook 'pretends' quite erroneously that they are - black hole for critical email that we must keep according to engineering contracts for design documentation purposes. Thank you! Matt Grant

2 1

Problem with replication between two servers (ispconfig)
by Claudio Junior 12 May '21

12 May '21

Hi people, I am setting up replication between two servers. The installation of the servers was done using ispconfig and the operating system is debian 10. The problem is that after following the guide for this configuration, https://wiki.dovecot.org/Replication, when I start the server, replication does not start. I have also checked, via tcpdump, on the port associated with doveadm. If I force it with the command "doveadm -D sync -u user @ domain -d -N -l 30 -U" the replication happens, but it is not updating when the user receives emails on server01. At this time server02 will not receive emails (via postfix), and will also not have users accessing via pop3 or imap, but I have the idea of configuring so that both servers have these services working. The configuration of the servers is below: root@server01:~# doveconf -n # 2.3.4.1 (f79e8e7e4): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.4 () # OS: Linux 4.19.0-16-amd64 x86_64 Debian 10.9 # Hostname: server01.example.net auth_mechanisms = plain login debug_log_path = /var/log/dovecot.debug disable_plaintext_auth = no doveadm_password = # hidden, use -P to show it doveadm_port = 2727 imap_capability = +SEPCIAL-USE XLIST listen = *,[::] lmtp_rcpt_check_quota = yes log_timestamp = "%Y-%m-%d %H:%M:%S " mail_debug = yes mail_max_userip_connections = 100 mail_plugins = quota notify replication mail_privileged_group = vmail namespace inbox { inbox = yes location = mailbox Drafts { special_use = \Drafts } mailbox Junk { auto = subscribe autoexpunge = 60 days special_use = \Junk } mailbox Sent { special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Trash { auto = subscribe autoexpunge = 60 days special_use = \Trash } prefix = separator = . } passdb { args = /etc/dovecot/dovecot-sql.conf driver = sql } plugin { mail_replica = tcp:server02.example.net:2727 quota = dict:user::file:/var/vmailquota/%d/%n/.quotausage quota_status_nouser = DUNNO quota_status_overquota = 552 5.2.2 Mailbox is full quota_status_success = DUNNO sieve = /var/vmail/%d/%n/.sieve sieve_after = /var/vmail/%d/%n/.ispconfig.sieve sieve_before = /var/vmail/%d/%n/.ispconfig-before.sieve sieve_max_actions = 100 sieve_max_redirects = 25 sieve_max_script_size = 2M } protocols = imap pop3 lmtp service aggregator { fifo_listener replication-notify-fifo { mode = 0660 user = vmail } unix_listener replication-notify { mode = 0660 user = vmail } } service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0660 user = postfix } unix_listener auth-userdb { group = vmail mode = 0600 user = vmail } user = root } service doveadm { inet_listener { port = 2727 } unix_listener doveadm-server { user = vmail } } service imap-login { client_limit = 1000 process_limit = 512 } service lmtp { unix_listener /var/spool/postfix/private/dovecot-lmtp { group = postfix mode = 0600 user = postfix } } service quota-status { client_limit = 1 executable = quota-status -p postfix unix_listener /var/spool/postfix/private/quota-status { group = postfix mode = 0660 user = postfix } } service replicator { process_min_avail = 1 unix_listener replicator-doveadm { mode = 0660 user = vmail } } service stats { unix_listener stats-reader { group = vmail mode = 0660 user = vmail } unix_listener stats-writer { group = vmail mode = 0660 user = vmail } } ssl_cert = </etc/postfix/smtpd.cert ssl_cipher_list = ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384 ssl_dh = # hidden, use -P to show it ssl_key = # hidden, use -P to show it ssl_min_protocol = TLSv1.2 userdb { driver = prefetch } userdb { args = /etc/dovecot/dovecot-sql.conf driver = sql } protocol imap { auth_verbose = yes mail_plugins = quota imap_quota } protocol pop3 { auth_verbose = yes mail_plugins = quota pop3_uidl_format = %08Xu%08Xv } protocol lda { mail_plugins = sieve quota postmaster_address = postmaster(a)server01.example.net } protocol lmtp { mail_plugins = quota sieve postmaster_address = postmaster(a)server01.example.net } local_name server01.example.net { ssl_cert = </etc/letsencrypt/live/server01.example.net/fullchain.pem ssl_key = # hidden, use -P to show it } local_name mail.example.net { ssl_cert = </etc/letsencrypt/live/mail.example.net/fullchain.pem ssl_key = # hidden, use -P to show it } local_name mail.otherdomain1.com.br { ssl_cert = </etc/letsencrypt/live/mail.otherdomain1.com.br/fullchain.pem ssl_key = # hidden, use -P to show it } root@server02:/var/vmail# doveconf -n # 2.3.4.1 (f79e8e7e4): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.4 () # OS: Linux 4.19.0-16-amd64 x86_64 Debian 10.9 # Hostname: server02.example.net auth_mechanisms = plain login debug_log_path = /var/log/dovecot.debug disable_plaintext_auth = no doveadm_password = # hidden, use -P to show it doveadm_port = 2727 listen = *,[::] log_timestamp = "%Y-%m-%d %H:%M:%S " mail_debug = yes mail_max_userip_connections = 100 mail_plugins = " notify replication" mail_privileged_group = vmail namespace inbox { inbox = yes location = mailbox Drafts { auto = no special_use = \Drafts } mailbox Junk { auto = subscribe autoexpunge = 60 days special_use = \Junk } mailbox Sent { auto = no special_use = \Sent } mailbox "Sent Messages" { auto = no special_use = \Sent } mailbox Trash { auto = subscribe autoexpunge = 60 days special_use = \Trash } prefix = } passdb { args = /etc/dovecot/dovecot-sql.conf driver = sql } plugin { mail_replica = tcp:server01.example.net:2727 quota = dict:user::file:/var/vmailquota/%d/%n/.quotausage sieve = /var/vmail/%d/%n/.sieve sieve_max_redirects = 25 } protocols = imap pop3 service aggregator { fifo_listener replication-notify-fifo { group = root mode = 0660 user = vmail } unix_listener replication-notify { group = root mode = 0660 user = vmail } } service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0660 user = postfix } unix_listener auth-userdb { group = vmail mode = 0600 user = vmail } user = root } service doveadm { inet_listener { port = 2727 } unix_listener doveadm-server { user = vmail } } service imap-login { client_limit = 1000 process_limit = 512 } service lmtp { unix_listener /var/spool/postfix/private/dovecot-lmtp { group = postfix mode = 0600 user = postfix } } service replicator { unix_listener replicator-doveadm { group = root mode = 0660 user = vmail } } service stats { unix_listener stats-reader { group = vmail mode = 0660 user = vmail } unix_listener stats-writer { group = vmail mode = 0660 user = vmail } } ssl_cert = </etc/postfix/smtpd.cert ssl_dh = # hidden, use -P to show it ssl_key = # hidden, use -P to show it userdb { driver = prefetch } userdb { args = /etc/dovecot/dovecot-sql.conf driver = sql } protocol imap { mail_plugins = quota imap_quota } protocol pop3 { mail_plugins = quota pop3_uidl_format = %08Xu%08Xv } protocol lda { mail_plugins = sieve quota postmaster_address = postmaster(a)example.net } protocol lmtp { mail_plugins = quota sieve postmaster_address = postmaster(a)example.net } root@server02:/var/vmail# Att Claudio Jr. -- Claudio da Silva Junior csjunior(a)gmail.com

2 2

Variable expansion in password field (again?!)
by Mathias Rabe 11 May '21

11 May '21

Hi list, I’m experimenting with the mail-crypt-plugin in Dovecot v2.3.4.1 on Debian 10 Buster. I’m also running a OpenLDAP-Server for user lookup. My LDAP-settings looks like this: hosts = ### dn = cn=###,dc=###,dc=## dnpass = ### tls = yes auth_bind = no ldap_version = 3 base = ou=people,dc=###,dc=## scope = subtree user_attrs = \ =quota_rule=*:bytes=%{ldap:mailQuota}, \ =home=/var/vmail/mailboxes/%d/%{ldap:uid}, \ =mail=maildir:/var/vmail/mailboxes/%d/%{ldap:uid}/mail user_filter = (&(mail=%u)(objectClass=person)(mailEnabled=TRUE)) pass_attrs = mail=user,userPassword=password,=userdb_mail_crypt_private_password=%w,mailCrypt=userdb_mail_crypt_save_version pass_filter = (&(mail=%u)(objectClass=person)(mailEnabled=TRUE)) iterate_attrs = mail=user iterate_filter = (objectClass=person) default_pass_scheme = SSHA-512 The users can log-in and everything works fine including the mail-crypt-plugin until an user password contains a % I get the following error message (example): Error: Failed to expand plugin setting mail_crypt_private_password = '"1234%Passwort"': Unknown variable '%P‘ I’ve found some mails but I didn’t found a solution. It seems that Dovecot tries to expand some variable in the password: https://dovecot.org/pipermail/dovecot/2019-July/116338.html https://dovecot.org/pipermail/dovecot/2020-April/118634.html So this seems to be a bug or something. Is there any new information on this topic or even any solution or workaround? Thank you very much! Mathias

3 2

sudden performance drop - i/o related
by Marcin Gryszkalis 11 May '21

11 May '21

Hi I have exim/dovecot server that worked great for last few years and two weeks ago it got ill ;) First were users reporting errors on saving mails to Sent (timeouts). Now the logs are infested with warnings about long waits: May 10 10:18: Maildir /mail/xxx Synchronization took 193 seconds (1 new msgs, 0 flag change attempts, 0 expunge attempts) May 10 10:18: Maildir /mail/xxx Synchronization took 125 seconds (1 new msgs, 0 flag change attempts, 0 expunge attempts) May 10 10:18: Maildir /mail/xxx Synchronization took 211 seconds (1 new msgs, 0 flag change attempts, 0 expunge attempts) May 10 10:18: Maildir /mail/xxx Synchronization took 107 seconds (8 new msgs, 0 flag change attempts, 0 expunge attempts) May 10 10:18: Transaction log file /mail/xxx was locked for 36 seconds (Mailbox was synchronized) May 10 10:18: Transaction log file /mail/xxx was locked for 160 seconds (Mailbox was synchronized) May 10 10:18: Transaction log file /mail/xxx was locked for 72 seconds (Mailbox was synchronized) May 10 10:18: Locking transaction log file /mail/xxx took 60 seconds (syncing) May 10 10:18: Locking transaction log file /mail/xxx took 38 seconds (syncing) May 10 10:18: Locking transaction log file /mail/xxx took 35 seconds (syncing) It looks like i/o risen from 150writes/s to 500writes/s (in top hours) - but there's no real change in number of emails or the volume. Number of users is steady (~100 active users, ~250 imap sessions), number of emails (by count or by volume) is rising and falling within 15% margin. The box is FreeBSD 11.4, dovecot is 2.3.13. Filesystem is ZFS, disks are fine, free space is around 20% (~200GB) Layout is Maildir. CPU is not overloaded (2x6core), same with memory (48GB). I didn't change anything in configuration. Tonight I did some finetuning like maildir_copy_with_hardlinks=yes or mail_fsync=never/optimized (I'm not happy with that but I'm afraid it won't really help and I'll be able to revert that). I'm also thinking about switching from Maildir to sdbox (I know it won't hurt). I don't know where to look to find where the i/o goes. I don't have any metrics/stats enabled (I looked at the docs but it looks it's not really simple and needs some digging to get valuable config). Maybe somebody has suggestions what to look for? For detailed per-process stats I need to rebuild kernel with dtrace (other night I guess)... Simple top (in i/o mode - similar to linux's iotop) doesn't catch short living processes (like LDA deliveries). best regards -- Marcin Gryszkalis, PGP 0xA5DBEEC7 http://fork.pl/gpg.txt

2 3

mdbox / selecting folder accesses hundrets of others
by Florian Lohoff 10 May '21

10 May '21

Dovecot: 2.3.4 Hi, i am debugging a problem where after a force-resync removed all cache files (All files are 44 byte). Trying to open a folder takes literally minutes (Huge mailbox - 220K folder, 45GByte compressed storage) After i straced the imap process i can see the imap process accesses hundrets of other completely unrelated folders: Thats from the logfile - You can see mutt selecting the mailbox "zzzzzzt": May 07 18:05:19 imap(inbox@wasteland)<20381><hlkrmL/B5qwgAwDvnxMdAGcc/5MSpYxQ>: Debug: fts: No fts setting - plugin disabled May 07 18:05:19 imap(inbox@wasteland)<20381><hlkrmL/B5qwgAwDvnxMdAGcc/5MSpYxQ>: Debug: quota: quota_over_flag check: quota_over_script unset - skipping May 07 18:05:19 imap(inbox@wasteland)<20381><hlkrmL/B5qwgAwDvnxMdAGcc/5MSpYxQ>: Debug: Mailbox zzzzzzt: Mailbox opened because: SELECT From strace -p 20381 - This goes on for minutes opening thousands of unrelated folders. It is noteworthy that it mostly opens nested folders which are rare here: [...] open("/var/vmail/wasteland/inbox/mdbox/mailboxes/gerries/are/hawt", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 15 fstat(15, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents(15, /* 3 entries */, 32768) = 72 stat("/var/vmail/wasteland/inbox/mdbox/mailboxes/gerries/are/hawt/yeah", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 stat("/var/vmail/wasteland/inbox/mdbox/mailboxes/gerries/are/hawt/yeah/dbox-Mails", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents(15, /* 0 entries */, 32768) = 0 close(15) = 0 open("/var/vmail/wasteland/inbox/mdbox/mailboxes/karl588594", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 15 fstat(15, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents(15, /* 3 entries */, 32768) = 80 stat("/var/vmail/wasteland/inbox/mdbox/mailboxes/karl588594/b3914", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 stat("/var/vmail/wasteland/inbox/mdbox/mailboxes/karl588594/b3914/dbox-Mails", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents(15, /* 0 entries */, 32768) = 0 close(15) = 0 open("/var/vmail/wasteland/inbox/mdbox/mailboxes/ben", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 15 fstat(15, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents(15, /* 4 entries */, 32768) = 104 stat("/var/vmail/wasteland/inbox/mdbox/mailboxes/ben/gang", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 stat("/var/vmail/wasteland/inbox/mdbox/mailboxes/ben/gang/dbox-Mails", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 Reopening the same folder again is quick and seamless. So it seems this is some cache recreation code looking into other folders. I am bit puzzled on why it does this. mail_debug=yes did now show anything. Any more debug options for mdbox i might set to find out about its decisions? Flo -- Florian Lohoff f(a)zz.de Any sufficiently advanced technology is indistinguishable from magic.

3 5

Writing an custom imap command
by Ryan Beethe 10 May '21

10 May '21

I'm interested in writing a custom imap command that behaves a bit like IDLE but synchronizes some state that is specific to my mail client / mail server. I found that stateless commands were trivial to understand, and I really like the plugin pattern for registering custom commands. But I have a few questions on how to write a long-running command that I was not able to answer by reading through the code. This mailing list seems like the best place to ask them. For reference, the source code for my custom command is here: https://github.com/Splintermail/splintermail-client/blob/dev/server/xkeysyn… Thanks, Ryan ------ 1. Why does cmd-idle.c sometimes call client_command_free()? But sometimes it doesn't? For example, cmd_idle_continue() frees it in some branches but not others. That makes no sense to me; it seems like it should be based on your entrypoint (mailbox notify callback vs input callback vs timeout callback), not based on which branch of logic within that entrypoint. 2. Why does cmd-idle.c ever call client_destroy()? That seems like something that should be invoked only by the imap process, not by any command. It calls it in cmd-idle.c:idle_callback (which is a mailbox notify callback). It invokes it after idle_sync_now() when it detects that client->disconnected is set. Maybe that happens in imap_sync_init() or something? 3. Why does cmd-idle.c ever call client_disconnect()? That also seems like the responsibility of the imap process, and not any command. idle_client_input_more() detects when i_stream_read returns -1, meaning that the client has *already disconnected*. Then it calls client_disconnect(). I think this is the crazy part... the istream is effectively unique to the imap process, so it seems unreasonable that any command is responsible for cleaning it up; it should just always happen at the imap process level before exiting, right? 4. What does client_continue_pending_input() actually do, and under what conditions does it need to be called? There is one place that you *can't* call it; there is a section in imap-client.c:client_handle_input() that calls imap-client.c:client_handle_next_command(), which calls the cmd->func(). That makes sense; that's the input trigger for the command plugin, so maybe you only have to trigger it when you are receiving input that doesn't fit into the normal command args behavior. It has a comment that says "this function is called at the end of I/O callbacks (and only there)". It _is_ called by client_input() and by client_output(), but also by: - cmd-idle.c:idle_client_input (io_add_istream callback) - cmd-append.c:client_input_append (io_add_istream callback) - imap-search.c:cmd_search_more_callback (timeout_add callback) The first two cases seem to be the only io_add_istream() commands that even exist, so that explains them. I can't explain the imap-search.c case at all. Reading through it I have really no idea what client_continue_pending_input is really doing. My command has a DONE mechanic just like IDLE so I'm pretty sure I need to invoke this function, I'm just concerned I'm going to do it wrong if I don't understand the mechanics of it.

3 6

huge mdbox broken / Log synchronization error
by Florian Lohoff 10 May '21

10 May '21

Hi, its the second time in 6 Month i have issues with a huge mdbox. It broken in November and i restored from backup because force-resync twice didnt fix it. (And restore from borg-backup was MUCH faster than force-resync) This time i have heavy delivery into that mailbox (postfix concurrency 1) and i tried merging folders with doveadm move. The move froze and now i seem to have a broken mdbox: Errors are: May 05 10:21:09 lda(inbox(a)wasteland.rfc822.org): Error: Log synchronization error at seq=2736,offset=135540 for /var/vmail/wasteland.rfc822.org/inbox/mdbox/storage/dovecot.map.index: Extension record inc drops number below zero (uid=7757856, diff=-1, orig=0) trying root@pax:~# doveadm -D -v force-resync -u inbox(a)wasteland.rfc822.org \* now. Although this will mostly likely take 8-10 hours. Mailbox is 44GByte (Compressed mdbox) and 220K folders. This is dovecot on Debian/Stretch dovecot-core 1:2.2.27-3+deb9u7 dovecot-imapd 1:2.2.27-3+deb9u7 dovecot-ldap 1:2.2.27-3+deb9u7 dovecot-managesieved 1:2.2.27-3+deb9u7 dovecot-pop3d 1:2.2.27-3+deb9u7 dovecot-sieve 1:2.2.27-3+deb9u7 dovecot-solr 1:2.2.27-3+deb9u7 Flo -- Florian Lohoff f(a)zz.de Any sufficiently advanced technology is indistinguishable from magic.

3 10

How to set lmtp delivery file/directory permissions?
by Kurt Fitzner 08 May '21

08 May '21

I have my postfix/dovecot virtual mail system essentially (otherwise) configured where Postfix is calling Dovecot for its virtual transport: virtual_transport = lmtp:unix:private/dovecot-lmtp But I can't for the life of me see how to change the file permissions dovecot uses to create maildir folders and files. I looked at the maildir [1], lmtp [2], and other documents and they are either silent on permissions or seem to reference a shared mail permissions document [3] that claims file and folder permissions are inherited. I want all files dovecot creates to be made accessible to the mail group. Please tell me this wasn't hard-coded a la postfix. Thanks, Kurt Fitzner Links: ------ [1] https://wiki.dovecot.org/MailboxFormat/Maildir#Maildir_and_filesystems [2] https://doc.dovecot.org/configuration_manual/protocols/lmtp_server/ [3] https://doc.dovecot.org/admin_manual/filesystem_permission/

1 0

Issue with dovecot SASL
by Piyush Joshi 08 May '21

08 May '21

Hi, I am getting the following error while authenticating any user, using SASL with postfix, please help me to fix this issue. May 08 17:34:50 master: Info: Dovecot v2.2.36.4 (baf9232c1) starting up for imap, pop3, lmtp, sieve (core dumps disabled) May 08 17:35:10 master: Error: service(auth): command startup failed, throttling for 2 secs May 08 17:35:10 auth: Fatal: master: service(auth): child 6969 killed with signal 11 (core dumps disabled) *Dovecot Configuration Output* root@mail:/usr/local/dovecot/etc/dovecot/conf.d# /usr/local/dovecot/sbin/dovecot -n # 2.2.36.4 (baf9232c1): /usr/local/dovecot/etc/dovecot/dovecot.conf # Pigeonhole version 0.4.24.2 (aaba65b7) # OS: Linux 4.19.0-16-amd64 x86_64 Debian 10.9 # Hostname: mail.example.com auth_default_realm = example.com auth_mechanisms = plain login base_dir = /usr/local/dovecot/var/run/dovecot/ default_client_limit = 5000 default_process_limit = 500 default_vsz_limit = 512 M first_valid_uid = 1001 last_valid_uid = 1001 listen = 127.0.0.1 lmtp_save_to_detail_mailbox = yes log_path = /var/log/imap login_greeting = Messaging Server mail_gid = 1001 mail_location = maildir:/%Lh/Maildir/:INDEX=/%Lh/Maildir/ mail_plugins = quota acl fts fts_lucene mail_uid = 1001 managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date index ihave duplicate mime foreverypart extracttext vacation-seconds imapflags notify namespace inbox { inbox = yes location = mailbox Archive { auto = subscribe special_use = \Archive } mailbox "Deleted Items" { special_use = \Trash } mailbox Drafts { auto = subscribe special_use = \Drafts } mailbox Junk { auto = subscribe special_use = \Junk } mailbox "Junk E-mail" { special_use = \Junk } mailbox Sent { auto = subscribe special_use = \Sent } mailbox "Sent Items" { special_use = \Sent } mailbox Trash { auto = subscribe special_use = \Trash } prefix = separator = . type = private } passdb { args = /usr/local/dovecot/etc/dovecot/dovecot-ldap.conf.ext driver = ldap } plugin { acl = vfile:/usr/local/dovecot/dovecot-acl/acl acl_shared_dict = file:/maildir/domains/dovecot/shared-mailboxes/shared-mailboxes.db fts = lucene fts_autoindex = yes fts_lucene = whitespace_chars=@. fts_tika = http://localhost:9997/tika/ quota = maildir:User quota quota_rule = *:storage=1G quota_warning = storage=85%% quota-warning 85 %u quota_warning2 = storage=90%% quota-warning 90 %u quota_warning3 = storage=95%% quota-warning 95 %u sieve = ~/.dovecot.sieve sieve_after = /usr/local/dovecot/sieve/default.sieve sieve_before = ~/sieve/01_vacation.sieve sieve_dir = ~/sieve sieve_extensions = +notify +imapflags +vacation +vacation-seconds sieve_global_dir = /usr/local/dovecot/sieve/ sieve_quota_max_scripts = 5 sieve_vacation_send_from_recipient = yes sieve_vacation_use_original_recipient = yes } pop3_client_workarounds = outlook-no-nuls oe-ns-eoh protocols = imap pop3 lmtp sieve service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0660 user = postfix } unix_listener auth-userdb { group = vmail mode = 0666 user = vmail } } service imap-login { inet_listener imap { port = 143 } inet_listener imaps { address = * port = 993 ssl = yes } } service imap-postlogin { executable = script-login /usr/local/dovecot/bin/postlogin.sh user = root } service imap { executable = /usr/local/dovecot/libexec/dovecot/imap imap-postlogin } service lmtp { executable = lmtp -L inet_listener lmtp { address = 127.0.0.1 ::1 port = 7025 } process_min_avail = 5 unix_listener /var/spool/postfix/private/dovecot-lmtp { group = postfix mode = 0600 user = postfix } user = vmail } service managesieve-login { inet_listener sieve-obsolete { port = 2000 } } service pop3-login { inet_listener pop3 { port = 110 } inet_listener pop3s { address = * port = 995 ssl = yes } } service quota-warning { executable = script /usr/local/dovecot/bin/quota-warning.sh unix_listener quota-warning { group = vmail mode = 0660 user = vmail } } service stats { unix_listener stats-reader { group = vmail mode = 0660 user = vmail } unix_listener stats-writer { group = vmail mode = 0660 user = vmail } } ssl = required ssl_ca = </etc/ssl/localcerts/intermediate.crt ssl_cert = </etc/ssl/localcerts/mail.crt ssl_key = # hidden, use -P to show it submission_host = 127.0.0.1 userdb { args = /usr/local/dovecot/etc/dovecot/dovecot-ldap.conf.ext driver = ldap } protocol lmtp { mail_plugins = quota acl fts fts_lucene sieve } protocol sieve { managesieve_logout_format = bytes ( in=%i : out=%o ) } protocol lda { info_log_path = /var/log/dovecot-lda.log log_path = /var/log/dovecot-lda-errors.log mail_plugins = quota acl fts fts_lucene sieve virtual } protocol imap { mail_max_userip_connections = 50 mail_plugins = quota acl fts fts_lucene imap_quota imap_acl } Thanks, Regards

1 0

Doveadm sync verbose not working?
by Plutocrat 07 May '21

07 May '21

Hi Was trying a sync with eg this. old is a host set up in my ssh config file. the user exists on both sides. The sync completes correctly copying mails back and forth, but offers no feedback. doveadm sync -u user(a)domain.com -f -R remote:old If I add -v I don't get any more information. Am I missing something? The manual says its meant to give more info and progress. doveadm -v sync -u user(a)domain.com -f -R remote:old Putting -v elsewhere on the commandline results in an error, so I think its in the right place. However -D works, but its a bit too verbose ... doveadm -D sync -u user(a)domain.com -f -R remote:old dovecot --version 2.3.7.2 (3c910f64b) P.

1 0

Adding virtual folders to an existing dovecot installation
by Christian Wolf 06 May '21

06 May '21

Hello dear dovecot mailinglist, I am having a dovecot installation that is working so far (together with sieve and managesieve). Now, I found the possibility to add a virtual folder to the server promising. I sort various mails using a per-user sieve script into subfolders. This works well on the latop but the mobile device does not like too many folders to check. So, I wanted to create a virtual inbox that holds all unread messages. I found this documentation: https://doc.dovecot.org/configuration_manual/virtual_plugin/ Now, I have first one question: When I use the virtual folder and read a message/mark it as read, will this be reflected on the underlaying folder or will it cause trouble on dovecot? As far as I understand, usage of sieve filtering and the virtual plugin is considered critical as mentioned in the documentation. This is due to the fact, that the virtual mailboxes are read-only by default (unless a folder is prefixed with a !-symbol). Sieve will try to filter the virtual folder as well be default and moving a message to another folder will fail the read-only assumption. Honestly, I do not get the content of https://doc.dovecot.org/ configuration_manual/virtual_plugin/#sieve-filters-with-virtual-mailboxes by 100%. The first paragraph indicates that sieve plus virtual mailboxes are a complete no-go, while the second indicates that a safe configuration is needed. Could someone please elaborate this a bit more? I have not yet changed anything as I did not want blindly break my production mail system. The current (unaltered) configuration I will attach below. Bonus question: Is it possible to restrict the effect of the virtual plugin to certain (virtual) user accounts? Thank you very much Christian # dovecot --version 2.3.13 (89f716dc2) #dovecot -n # 2.3.13 (89f716dc2): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.13 (cdd19fe3) # OS: Linux 5.11.2-arch1-1 x86_64 # Hostname: server-hh.hh.lupus auth_mechanisms = plain login mail_location = maildir:~/Maildir managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date index ihave duplicate mime foreverypart extracttext namespace inbox { inbox = yes location = mailbox Drafts { auto = subscribe special_use = \Drafts } mailbox Junk { special_use = \Junk } mailbox Sent { auto = subscribe special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Templates { auto = subscribe } mailbox Trash { auto = subscribe special_use = \Trash } prefix = } passdb { args = scheme=PLAIN username_format=%n /home/.vmail/%d/etc/shadow driver = passwd-file } plugin { sieve = file:~/sieve;active=~/.dovecot.sieve stats_refresh = 30 secs stats_track_cmds = yes } protocols = imap lmtp sieve service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0660 user = postfix } } service stats { fifo_listener stats-mail { mode = 0600 user = vmail } } ssl = required ssl_cert = </etc/letsencrypt/live/dovecot/fullchain.pem ssl_cipher_list = ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM- SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA- AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128- SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128- SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256- SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-DSS- AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:DHE-RSA-AES256- SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128- SHA:AES256-SHA:AES:CAMELLIA:DES-CBC3-SHA:!aNULL:!eNULL:!EXPORT:!DES:!RC4:! MD5:!PSK:!aECDH:!EDH-DSS-DES-CBC3-SHA:!EDH-RSA-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA ssl_dh = # hidden, use -P to show it ssl_key = # hidden, use -P to show it ssl_prefer_server_ciphers = yes userdb { args = uid=vmail gid=vmail home=/home/.vmail/%d/mails/%n driver = static } protocol lmtp { mail_plugins = " sieve" postmaster_address = postmaster(a)example.com } protocol lda { mail_plugins = " sieve" } protocol imap { mail_plugins = " old_stats" }

2 1

disable pop3 ports?
by Dan Egli 05 May '21

05 May '21

I admit I don't quite understand dovecot's config yet, but this is driving me batty. I was looking at my server and noticed that dovecot was listening on the pop3 ports (110/TCP). Since I do not use pop3 at all, nor does anyone who has ever or ever will connect to the server, that seems like a needless waste. So I went through the config files and commented out every reference to pop3 in them. But when I restart dovecot, it STILL opens a listener on 110. How do I fix this? The ONLY external ports I want dovecot listening to are imap4 and imap4s. Thanks! -- Dan Egli From my Test Server

10 20

POP3 mailbox errors and changing permissions on folders
by John Richards 05 May '21

05 May '21

1 0

How to Host Multiple Mail Domains (Email Hosting) in iRedMail Full Featured Linux Mail Server
by Turritopsis Dohrnii Teo En Ming 04 May '21

04 May '21

Subject: How to Host Multiple Mail Domains (Email Hosting) in iRedMail Full Featured Linux Mail Server Author: Mr. Turritopsis Dohrnii Teo En Ming (TARGETED INDIVIDUAL) Country: Singapore Date: 3rd May 2021 Monday Type of Publication: PDF Manual Document Version: 20210503.01 ***IMPORTANT NOTICE*** Please note that Turritopsis Dohrnii Teo En Ming’s guide is based on Xiao Guoan’s guide at linuxbabe.com. Reference Guide Used by Teo En Ming: How to Host Multiple Mail Domains in iRedMail with Nginx Link: https://www.linuxbabe.com/mail-server/set-up-iredmail-multiple-domains-nginx Original Author: Xiao Guoan The following is a list of open-source software that will be automatically installed and configured by iRedMail. • Postfix SMTP server • Dovecot IMAP server • Nginx web server to serve the admin panel and webmail • OpenLDAP, MySQL/MariaDB, or PostgreSQL for storing user information • Amavised-new for DKIM signing and verification • SpamAssassin for anti-spam • ClamAV for anti-virus • Roundcube webmail • SOGo groupware, providing webmail, calendar (CalDAV), contacts (CardDAV), tasks and ActiveSync services. • Fail2ban for protecting SSH • mlmmj mailing list manager • Netdata server monitoring • iRedAPD Postfix policy server for greylisting In addition, you need to add MX, A and TXT records to your ISC BIND DNS domain name server. Redundant download links for Turritopsis Dohrnii Teo En Ming's PDF manual: [1] https://www.mediafire.com/file/q6txmx0rc1cwfzw/Additional+Mail+Domains+1st+… [2] https://www.docdroid.net/Q9TRL5D/additional-mail-domains-1st-release-pdf [3] https://www.scribd.com/document/506193434/Additional-Mail-Domains-1st-Relea… [4] https://drive.google.com/file/d/10AYGt4-omBeC3vXJfzswQq0M7E09gXpG/view?usp=… [5] https://drive.google.com/file/d/113dy0AKmBYGugBueK1vS_dJwI35J6XmJ/view?usp=… [6] https://drive.google.com/file/d/1dhpYIZp31ug5hoiVNbjh6uh99s_PEx8q/view?usp=… Mr. Turritopsis Dohrnii Teo En Ming, 43 years old as of 4th May 2021, is a TARGETED INDIVIDUAL living in Singapore. He is an IT Consultant with a System Integrator (SI)/computer firm in Singapore. He is an IT enthusiast. -----BEGIN EMAIL SIGNATURE----- The Gospel for all Targeted Individuals (TIs): [The New York Times] Microwave Weapons Are Prime Suspect in Ills of U.S. Embassy Workers Link: https://www.nytimes.com/2018/09/01/science/sonic-attack-cuba-microwave.html ******************************************************************************************** Singaporean Targeted Individual Mr. Turritopsis Dohrnii Teo En Ming's Academic Qualifications as at 14 Feb 2019 and refugee seeking attempts at the United Nations Refugee Agency Bangkok (21 Mar 2017), in Taiwan (5 Aug 2019) and Australia (25 Dec 2019 to 9 Jan 2020): [1] https://tdtemcerts.wordpress.com/ [2] https://tdtemcerts.blogspot.sg/ [3] https://www.scribd.com/user/270125049/Teo-En-Ming -----END EMAIL SIGNATURE-----

1 0

mail_crypt module and error with tmp directory
by Fiorenza Meini 04 May '21

04 May '21

Hi, I successfully enable mail_crypt module but I'm experiencing a strange behaviour with tmp directory while accessing with POP3 protocol: I see in log file: Error: istream-seekable: safe_mkstemp(/tmp/dovecot.pop3.) failed: Permission denied I changed tmp directory configuration (mail_temp_dir variable) and setting it with 777 permission, but the error is the same. On client side it's working everything, but I'd like to understand the error and if I have to be worried about it. Thank you and regards Fiorenza -- Fiorenza Meini/Spazio Web Via Dante Alighieri, 10 - 13900 - BIELLA tel. +39 015 2431982-1 - fax 015 2522600 https://esseweb.eu -- Questo messaggio e i suoi allegati ai sensi del Regolamento (UE) 2016/679 sono indirizzati esclusivamente alle persone indicate. La diffusione, copia o qualsiasi altra azione derivante dalla conoscenza di queste informazioni sono rigorosamente vietate. Qualora abbiate ricevuto questo documento per errore siete pregati di darne immediata comunicazione al mittente e provvedere alla sua distruzione.

2 8

[Dovecot] Doveadm sometimes failed "to iterate through some users" after upgrade to 2.2
by Alessio Cecchi 04 May '21

04 May '21

Hi, I'm running every week in cron "doveadm expunge -A mailbox Spam before 30d" and monthly "doveadm quota recalc -A". After the upgrade to dovecot 2.2.12 (from 2.1.17), "doveadm -A" sometimes exit with this error: doveadm(user(a)domain.com): Error: User listing returned failure doveadm: Error: Failed to iterate through some users # echo $? 75 If I re-run the same command the user where doveadm stops changeing (always in alphabetical order): info@ mario@ pippo@ zazza@ and finally, after 3 or 4 run, ends with success. I have enable debug (via doveadm -D and auth/mail debub in 10-logging.con) but there are no errors or difference in the log when doveadm exit with the error (error code is 75). If I run # doveadm expunge -A mailbox Spam savedbefore 30d doveadm works fine Can somebody help me? Here is my configuration: # dovecot -n # 2.2.12: /etc/dovecot/dovecot.conf # OS: Linux 2.6.32-5-amd64 x86_64 Debian 6.0.9 auth_debug = yes auth_master_user_separator = * auth_verbose = yes deliver_log_format = msgid=%m, from=%f, subject="%s": %$ dict { expire = mysql:/etc/dovecot/dovecot-dict-sql.conf.ext sqlquota = mysql:/etc/dovecot/dovecot-dict-sql.conf.ext } disable_plaintext_auth = no dotlock_use_excl = no first_valid_gid = 89 first_valid_uid = 89 imap_client_workarounds = delay-newmail tb-extra-mailbox-sep tb-lsub-flags imap_idle_notify_interval = 29 mins imap_logout_format = in=%i out=%o session=<%{session}> last_valid_gid = 89 last_valid_uid = 89 lda_mailbox_autocreate = yes lda_mailbox_autosubscribe = yes listen = * mail_debug = yes mail_fsync = always mail_location = maildir:~/Maildir mail_nfs_index = yes mail_nfs_storage = yes mail_plugins = quota expire maildir_very_dirty_syncs = yes managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto reject envelope encoded-character subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date ihave vnd.dovecot.duplicate mmap_disable = yes namespace { list = children location = maildir:%%h/Maildir:INDEX=~/Maildir/shared/%%u prefix = shared/%%n/ separator = / subscriptions = no type = shared } namespace inbox { inbox = yes location = mailbox Drafts { auto = subscribe special_use = \Drafts } mailbox Sent { auto = subscribe special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Spam { auto = subscribe special_use = \Junk } mailbox Trash { auto = subscribe special_use = \Trash } prefix = separator = / } passdb { args = username_format=%Ld /etc/dovecot/extra/alias-domains-denylogin.txt deny = yes driver = passwd-file } passdb { args = /etc/dovecot/extra/master-users driver = passwd-file master = yes pass = yes } passdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } plugin { expire = Trash expire2 = Spam expire_dict = proxy::expire quota = maildir:UserQuota quota2 = dict:Quota Usage::noenforcing:proxy::sqlquota quota_grace = 10M quota_rule2 = Trash:storage=+100M quota_warning = storage=95%% quota-warning 95 %u quota_warning2 = storage=80%% quota-warning 80 %u sieve = ~/.dovecot.sieve sieve_before = /etc/dovecot/sieve/before.sieve sieve_dir = ~/sieve sieve_extensions = +vnd.dovecot.duplicate -vacation } pop3_client_workarounds = outlook-no-nuls oe-ns-eoh pop3_logout_format = top=%t/%p, retr=%r/%b, del=%d/%m, size=%s, bytes=%i/%o, session=<%{session}> protocols = imap pop3 sieve service auth-worker { process_limit = 1000 } service auth { client_limit = 5500 unix_listener auth-userdb { group = vchkpw mode = 0660 user = vpopmail } } service dict { process_limit = 300 unix_listener dict { group = vchkpw mode = 0660 user = vpopmail } } service imap-login { process_min_avail = 4 service_count = 0 } service imap { process_limit = 4000 service_count = 100 } service managesieve-login { inet_listener sieve { port = 4190 } } service pop3-login { service_count = 0 } service pop3 { process_limit = 1023 service_count = 100 } service quota-warning { executable = script /etc/dovecot/scripts/quota-warning.sh unix_listener quota-warning { user = vpopmail } user = vpopmail } ssl_cert = </etc/dovecot/ssl/wildcard-myemail.net.pem ssl_key = </etc/dovecot/ssl/wildcard-myemail.net.key submission_host = localhost userdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } protocol lda { mail_location = maildir:~/Maildir:INDEX=MEMORY mail_plugins = quota expire sieve } protocol imap { mail_max_userip_connections = 15 mail_plugins = quota expire imap_quota } protocol sieve { mail_max_userip_connections = 2 } protocol pop3 { mail_max_userip_connections = 5 } -- Alessio Cecchi is: @ ILS -> http://www.linux.it/~alessice/ on LinkedIn -> http://www.linkedin.com/in/alessice Assistenza Sistemi GNU/Linux -> http://www.cecchi.biz Cloud Email Hosting -> http://www.qboxmail.com @ PLUG -> ex-Presidente, adesso senatore a vita, http://www.prato.linux.it

3 3

Latest git FATAL error
by Joan Moreau 03 May '21

03 May '21

Hello On latest git of dovecot, I get Apr 24 04:07:36 gjserver dovecot[857958]: imap-login: Panic: file client-common.c: line 293 (client_disconnect): assertion failed: (client->prev == NULL && client->next == NULL) and login process crash On 2.3.14, there is no problems Hope it helps JM

3 17

Problem with Log-File
by Volf, Ronald (IRV) 03 May '21

03 May '21

Hello ! We want to log error in a File directly : /var/log/IRV_MdM/Dovecot_main.log. We got this error: 'Can't open log file /var/log/IRV_MdM/Dovecot_main.log: Permission denied' Please have a look at our Problem. Is it a bug or an incorrect config ? Our Dir-Structure is: (for testing, we changed all to mod 777) 2021-05-03 04:29:32 IRV-20210501-V02-rvh:~ # dir -d /var/ /var/log/ /var/log/IRV_MdM/ /var/log/IRV_MdM/Dovecot_main.log drwxrwxrwx 11 root root 4096 2021-04-30 20:36:51 /var/ drwxrwxrwx 21 root root 4096 2021-05-03 02:53:34 /var/log/ drwxrwxrwx 4 IRV_MdM IRV_MdMG 4096 2021-05-03 04:28:09 /var/log/IRV_MdM/ -rwxrwxrwx 1 IRV_MdM IRV_MdMG 14 2021-05-03 01:36:18 /var/log/IRV_MdM/Dovecot_main.log 2021-05-03 04:29:48 IRV-20210501-V02-rvh:~ # Version: 2021-05-03 04:28:05 IRV-20210501-V02-rvh:~ # dovecot --version 2.3.14 (cee3cbc0d) 2021-05-03 04:28:12 IRV-20210501-V02-rvh:~ # Logs: 2021-05-03 04:28:51 IRV-20210501-V02-rvh:~ # doveadm log find Debug: /var/log/IRV_MdM/Dovecot_main.log Info: /var/log/IRV_MdM/Dovecot_main.log Warning: /var/log/IRV_MdM/Dovecot_main.log Error: /var/log/IRV_MdM/Dovecot_main.log Fatal: /var/log/IRV_MdM/Dovecot_main.log Config: 2021-05-03 04:45:27 IRV-20210501-V02-rvh:~ # dovecot -n # 2.3.14 (cee3cbc0d): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.14 (1b5c82b2) # OS: Linux 5.12.0-1-default x86_64 ext3 # Hostname: IRV-20210501-V02-rvh auth_cache_size = 20 M auth_debug = yes auth_debug_passwords = yes auth_verbose = yes auth_verbose_passwords = plain default_internal_user = IRV_MdM default_login_user = IRV_MdM_Login deliver_log_format = msgid=%m: %$ (From=%f, To=%t, Subject=%s, Size=%p/%w, Dsn=%{storage_id}) disable_plaintext_auth = no first_valid_uid = 10000 last_valid_gid = 49999 last_valid_uid = 49999 listen = * log_path = /var/log/IRV_MdM/Dovecot_main.log log_timestamp = "%Y-%m-%d %H:%M:%S " login_greeting = Welcome to the INetS - Multi-Device-Mail-Server. mail_access_groups = IRV_MdMG mail_debug = yes mail_location = maildir:/var/spool/IRV_MdM/User/%u/Mail:CONTROL=/var/spool/IRV_MdM/User/%u/C trl:INDEX=/var/spool/IRV_MdM/User/%u/Index:LAYOUT=fs mail_temp_dir = /var/spool/IRV_MdM/Tmp managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date index ihave duplicate mime foreverypart extracttext namespace inbox { inbox = yes location = mailbox Drafts { special_use = \Drafts } mailbox Junk { special_use = \Junk } mailbox Sent { special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Trash { special_use = \Trash } prefix = } passdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } plugin { sieve = file:~/sieve;active=~/.dovecot.sieve } pop3_client_workarounds = outlook-no-nuls oe-ns-eoh postmaster_address = <mailto:Support@IRV.at> Support(a)IRV.at ssl_cert = /Apps_IRV/Web/Cert/IRV_star_irv_at/IRV_STAR_irv_at.Crt.crt ssl_cipher_list = ALL:!aNULL:!eNULL:!EXPORT:!DES:!3DES:!MD5:!PSK:!RC4:!ADH:!LOW@STRENGTH ssl_key = # hidden, use -P to show it ssl_options = no_compression ssl_prefer_server_ciphers = yes userdb { driver = prefetch } userdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } verbose_proctitle = yes 2021-05-03 04:45:42 IRV-20210501-V02-rvh:~ # OS: 2021-05-03 04:45:42 IRV-20210501-V02-rvh:~ # i_ver Isg-Release: Version = 07.00.22 from 2021-01-22 21:13. Linux-Release: openSUSE Tumbleweed 20210430 Linux 5.12.0-1-default x86_64. 2021-05-03 05:13:01 IRV-20210501-V02-rvh:~ # Please send the reply to Support(a)IRV.at. Mit freundlichen Grüßen / with best regards Ing. Ronald VOLF <http://www.irv.at/> IRV Datenverarbeitung GmbH Internet: <http://www.irv.at/> www.irv.at Mail: <mailto:Sales@IRV.at> Sales(a)IRV.at Tel.: (+43-2236) 2236 7 * Fax: (+43-2236) 2191 7 / 30 Addr.: Brown Boveri Strasse 6, Top 18 2351 Wr. Neudorf, Austria

3 2

Sieve - disable redirect
by Miloslav Hůla 03 May '21

03 May '21

Hi, I would like to disallow "redirect" in sieve scripts to prevent automatical e-mail forwarding out of organisation. I'dint find a way in [1], only "sieve_extensions" option and when I try "sieve_extensions = -redirect" I got: # sievec test.sieve sievec(root): Warning: sieve: ignored unknown extension 'redirect' while configuring available extensions Is there any way? Kind regards Milo [1] https://doc.dovecot.org/configuration_manual/sieve/configuration/

1 1

setmetadata and NIL
by Steffen 03 May '21

03 May '21

Hi everybody, I played with Dovecot's metadata in dovecot-core 2:2.3.14-5+debian9 from repo deb https://repo.dovecot.org/ce-2.3-latest/debian/stretch stretch main https://tools.ietf.org/html/rfc5464#section-4.3 and https://github.com/coi-dev/coi-specs/blob/master/webpush-spec.md use NIL to remove items. Unsubscribe To unsubscribe from push notification set the previously push annotation to NIL. *Example for unsubscribing from push notifications: * C: a SETMETADATA "" (/private/vendor/vendor.dovecot/webpush/subscriptions/31754ee7-d3ee-4226-b112-6895ed26fcf8 NIL) S: a OK SETMETADATA complete and C: a SETMETADATA INBOX (/private/comment NIL) S: a OK SETMETADATA complete In the above example, the entry "/private/comment" is removed from the mailbox "INBOX". However, the metadata is stored as string NIL instead of removed: cat /home/user/Maildir/dovecot-attributes priv/369c8f17e81ff151f40400002e27b77f/vendor/vendor.dovecot/pvt/server/vendor/vendor.dovecot/webpush/subscriptions/31754ee7-d3ee-4226-b112-6895ed26fcf8 NIL priv/369c8f17e81ff151f40400002e27b77f/comment NIL shared/369c8f17e81ff151f40400002e27b77f/comment NIL a GETMETADATA (DEPTH 1) "" (/private/vendor/vendor.dovecot/webpush/subscriptions) * METADATA "" (/private/vendor/vendor.dovecot/webpush/subscriptions/31754ee7-d3ee-4226-b112-6895ed26fcf8 {3} NIL) a OK Getmetadata completed (0.001 + 0.000 secs). Do I have misinterpreted the samples? I though, the metadata is to be removed and getmetadata should not return the string NIL. Kind regards, -- Steffen

2 1

Can the disable_plaintext_auth setting get overridden for a specific port?
by Steve Dondley 03 May '21

03 May '21

In 10-auth.conf, I have "disable_plaintext_auth = yes" For port 143, I'd like to do something like this to override that setting: service imap-login { inet_listener imap { port = 143 disable_plain_text_auth = no } } Based on https://wiki.dovecot.org/LoginProcess and https://doc.dovecot.org/configuration_manual/service_configuration/ it doesn't seem like this is supported. But maybe there is another way to accomplish this?

3 2

Error and Panic (with coredump)
by Thomas Knaute 03 May '21

03 May '21

Hi there, i'm pretty new to this stuff, just tell me if you need more information. Apr 26 17:15:43 dilia dovecot: imap(user(a)domain.de)<78561><rtYxnuHAZoPAqBSC>: Error: i_stream_seekable_write_failed: close((&sstream->fd)) @ istream-seekable.c:246 failed (fd=21): Bad fi le descriptor Apr 26 17:15:43 dilia dovecot: imap(user(a)domain.de)<78561><rtYxnuHAZoPAqBSC>: Panic: file istream-seekable.c: line 226 (read_from_buffer): assertion failed: (*ret_r >0) Apr 26 17:15:43 dilia dovecot: imap(user(a)domain.de)<78561><rtYxnuHAZoPAqBSC>: Error: Raw backtrace: /usr/lib/dovecot/libdovecot.so.0(+0xdb73b) [0x7f13aead973b] -> /usr/lib/dovecot/libdov ecot.so.0(+0xdb7d1) [0x7f13aead97d1] -> /usr/lib/dovecot/libdovecot.so.0(+0x4a199) [0x7f13aea48199] -> /usr/lib/dovecot/libdovecot.so.0(+0x4c7cf) [0x7f13aea4a7cf] -> /usr/lib/dovecot/libdove cot.so.0(+0xee6e2) [0x7f13aeaec6e2] -> /usr/lib/dovecot/libdovecot.so.0(+0xeeb46) [0x7f13aeaecb46] -> /usr/lib/dovecot/libdovecot.so.0(+0xe6cd9) [0x7f13aeae4cd9] -> /usr/lib/dovecot/libdovec ot.so.0(i_stream_get_size+0x2a) [0x7f13aeae5baa] -> /usr/lib/dovecot/modules/lib20_zlib_plugin.so(+0x417c) [0x7f13ae80817c] -> /usr/lib/dovecot/libdovecot-storage.so.0(index_mail_set_seq+0x2 5) [0x7f13aec57eb5] -> /usr/lib/dovecot/libdovecot-storage.so.0(+0xd19ce) [0x7f13aec5e9ce] -> /usr/lib/dovecot/libdovecot-storage.so.0(index_storage_search_next_nonblock+0x61) [0x7f13aec5f0e 1] -> /usr/lib/dovecot/libdovecot-storage.so.0(mailbox_search_next_nonblock+0x28) [0x7f13aebe7e58] -> dovecot/imap [user(a)domain.de 192.168.xxx.xxx UID SORT](+0x2695f) [0x55740be9495f] -> dovecot/imap [user(a)domain.de 192.168.xxx.xxx UID SORT](imap_search_start+0xdc) [0x55740be9528c] -> dovecot/imap [user(a)domain.de 192.168.xxx.xxx UID SORT](cmd_sort+0x271) [0x55740be87b7 1] -> dovecot/imap [user(a)domain.de 192.168.xxx.xxx UID SORT](command_exec+0x70) [0x55740be8ddc0] -> dovecot/imap [user(a)domain.de 192.168.xxx.xxx UID SORT](+0x1e3f2) [0x55740be8c3f2] -> dovecot/imap [user(a)domain.de 192.168.xxx.xxx UID SORT](+0x1e494) [0x55740be8c494] -> dovecot/imap [user(a)domain.de 192.168.xxx.xxx UID SORT](client_handle_input+0x1b5) [0x55740be8c845] -> dovecot/imap [user(a)domain.de 192.168.xxx.xxx UID SORT](client_input+0x7e) [0x55740be8cd6e] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_call_io+0x6f) [0x7f13aeaefbef] -> /usr/lib/dovec ot/libdovecot.so.0(io_loop_handler_run_internal+0x136) [0x7f13aeaf11e6] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run+0x4c) [0x7f13aeaefc8c] -> /usr/lib/dovecot/libdovecot.so.0(io_ loop_run+0x40) [0x7f13aeaefdf0] -> /usr/lib/dovecot/libdovecot.so.0(master_service_run+0x13) [0x7f13aea70123] -> dovecot/imap [user(a)domain.de 192.168.xxx.xxx UID SORT](main+0x325) [0x5574 0be7ebf5] -> /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xeb) [0x7f13ae85709b] Apr 26 17:15:44 dilia dovecot: imap(user(a)domain.de)<78561><rtYxnuHAZoPAqBSC>: Fatal: master: service(imap): child 78561 killed with signal 6 (core dumped) # 2.3.4.1 (f79e8e7e4): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.4 () # OS: Linux 4.19.0-9-amd64 x86_64 Debian 10.9 # Hostname: dilia.intern.domain.de auth_cache_size = 10 M auth_default_realm = domain.de auth_mechanisms = plain login default_vsz_limit = 1 G disable_plaintext_auth = no imapc_features = " fetch-headers" imapc_host = mail.intern.domain.de imapc_user = %u mail_location = maildir:~/Maildir mail_plugins = zlib acl mail_prefetch_count = 20 managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify envir onment mailbox date index ihave duplicate mime foreverypart extracttext namespace { hidden = no ignore_on_failure = no inbox = no list = children location = maildir:%%h/Maildir:INDEX=%h/shared/%%u:CONTROL=%h/shared/%%u prefix = shared/%%u/ separator = / subscriptions = yes type = shared } namespace inbox { hidden = no inbox = yes list = yes location = mailbox Drafts { auto = subscribe special_use = \Drafts } mailbox Junk { auto = subscribe special_use = \Junk } mailbox Sent { auto = subscribe special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Trash { auto = subscribe special_use = \Trash } prefix = INBOX/ separator = / subscriptions = yes type = private } passdb { args = /etc/dovecot/dovecot-ldap.conf.ext driver = ldap } plugin { acl = vfile acl_shared_dict = file:/var/lib/dovecot/db/shared-mailboxes.db mail_log_events = delete undelete expunge copy mailbox_delete mailbox_rename mail_log_fields = uid box msgid size sieve = file:~/sieve;active=~/.dovecot.sieve zlib_save = gz zlib_save_level = 6 } protocols = " imap lmtp sieve" service auth { unix_listener /var/spool/postfix/private/auth { mode = 0666 } unix_listener auth-userdb { group = vmail user = vmail } } service imap-login { process_min_avail = 12 service_count = 0 } service imap { process_limit = 8192 } service lmtp { inet_listener lmtp { address = 127.0.0.1 port = 24 } } service managesieve-login { inet_listener sieve { port = 4190 } inet_listener sieve_deprecated { port = 2000 } } ssl_cert = </etc/ssl/certs/mail.intern.combined.cer ssl_cipher_list = ALL:!kRSA:!SRP:!kDHd:!DSS:!aNULL:!eNULL:!EXPORT:!DES:!3DES:!MD5:!PSK:!RC4:!ADH:!LOW:!DH@STRENGTH ssl_dh = # hidden, use -P to show it ssl_key = # hidden, use -P to show it ssl_min_protocol = TLSv1.2 ssl_prefer_server_ciphers = yes userdb { driver = prefetch } userdb { args = /etc/dovecot/dovecot-ldap.conf.ext driver = ldap } verbose_proctitle = yes protocol lmtp { mail_plugins = zlib acl sieve } protocol imap { mail_max_userip_connections = 20 mail_plugins = zlib acl imap_zlib imap_acl } Regards, Thomas

2 5

Sieve Auth failing (ignore previous message please)
by Dan Egli 02 May '21

02 May '21

Hi folks. I'm VERY new to Dovecot and Sieve. But I'm having an issue that I need help with. For some reason my sieve daemon won't allow people to log on. I have dovecot set to read information from a MySQL table, and that works fine. I can login to dovecot's imap server just fine. But I have SOGo for the webmail and it won't login to the sieve daemon. Here's what I see in the log files when I, for example, try to save my preferences in SOGo: ==> info.log <== Apr 28 00:33:14 lmtp(5938): Info: Connect from 127.0.0.1 ==> /var/log/sogo/sogod.log <== Apr 28 00:33:14 sogod [24168]: <0x0x557cfa9083c0[SOGoSieveManager]> failure. Attempting with a renewed password (no authname supported) Apr 28 00:33:14 sogod [24168]: <0x0x557cfa9083c0[SOGoSieveManager]> Could not login 'dan(a)newideatest.site' on Sieve server: <0x0x557cfaa03a70[NGSieveClient]: socket=<NGActiveSocket[0x0x557cfa89d540]: mode=rw address=<0x0x557cfa89d5d0[NGInternetSocketAddress]: host=localhost port=45456> connectedTo=<0x0x557cfa837c00[NGInternetSocketAddress]: host=127.0.0.1 port=4190>>>: {RawResponse = "{}"; result = 0; } ==> info.log <== Apr 28 00:33:14 lmtp(5938): Info: Disconnect from 127.0.0.1: Remote closed connection unexpectedly (state=READY) ==> /var/log/sogo/sogod.log <== Apr 28 00:33:14 sogod [24168]: 2600:387:8:7::70 "POST /SOGo/so/dan(a)newideatest.site/Preferences/save HTTP/1.1" 503 46/3676 0.024 - - 0 - 17 I've read a lot of pages about getting sieve running, but they show things I don't get. For example, from https://rtcamp.com/tutorials/mail/server/sieve-filtering/ I see that telnet localhost 4190 should give this: Escape character is '^]'. *"IMPLEMENTATION" "Dovecot Pigeonhole" "SIEVE" "fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date ihave" *"NOTIFY" "mailto" "SASL" "PLAIN LOGIN" "STARTTLS" "VERSION" "1.0" OK "Dovecot ready." But I don't see any of that. Escape character is '^]'. 220 jupiter.newideatest.site Dovecot ready. I've gotten to the point where I'm pulling my hair out. I don't understand dovecot well enough to even begin to guess what's going on. So I could REALLY use some pointers. Thanks all! Oh, ignore the first message. For some reason my MUA will occasionally send a draft to the smtp server. I still haven't figured that one out yet. -- Dan Egli From my Test Server

3 3

Ability to reject invalid client certificate at TLS handshake time
by Gert van Dijk 02 May '21

02 May '21

Hi, After a bit of struggling I've been able to set up TLS client certificate authentication with Dovecot for both IMAP and Submission. Users are required to present a valid certificate, cool so far! What I noticed however on non-StartTLS listeners IMAPS (993) and SMTPS (465), is that during the TLS handhake presenting a valid client certificate is seemingly optional and is only checked later at time of protocol-level login (external auth in my case). I'd like to change that for security purposes and also a bit of obscurity. Not having the ability to interact with Dovecot on protocol level lowers the attack vector as well as the ease of checking my network security. Also, it would prevent (anonymous) network scanners to easily detect what kind of service is running on the port as they can see the IMAP/SMTP banner without presenting a valid TLS client certificate currently. Is it possible in any version of Dovecot to configure it to set up a TLS server listening context that requires a handshake with a valid client certificate? I'm using Dovecot 2.3.4.1 (actual Debian Buster version 2.3.4.1-5+deb10u6), but willing to upgrade to any newer version when this is offered. Going through some newer revisions changelog this seems not the case, so I didn't spend time on upgrading yet. Relevant config snippets for IMAP authenticating proxy that I use (something similar for Submission): # Opens 143 on StartTLS and 993 in wrapped TLS-only mode. # Only 993 is exposed to the internet. protocols = imap passdb { driver = static args = proxy=y host=10.1.2.3 port=1143 pass=masterpass nopassword=y } auth_username_format = %n ssl = required ssl_cert = </etc/dovecot-ssl/cert.crt ssl_key = </etc/dovecot-ssl/key.pem ssl_prefer_server_ciphers = yes ssl_min_protocol = TLSv1.2 ssl_cipher_list = [omitted for brevity] ssl_ca = </etc/dovecot-ssl/client-ca.crt ssl_verify_client_cert = yes # Required to set this to 'no' if no CRL is set up yet ssl_require_crl = no auth_ssl_require_client_cert = yes # Take the username from the client certificate (CN) auth_mechanisms = external auth_ssl_username_from_cert = yes ssl_cert_username_field = commonName Current behaviour from a client when deliberately not presenting a client certificate shows the IMAP banner: $ openssl s_client -connect myserver:993 CONNECTED(00000003) --- Certificate chain 0 [...] --- Server certificate -----BEGIN CERTIFICATE----- [...] --- Acceptable client certificate CA names C = NL, O = Gert van Dijk, [...] --- SSL handshake has read 1096 bytes and written 413 bytes Verification: OK --- New, TLSv1.3, Cipher is TLS_AES_256_GCM_SHA384 Server public key is 384 bit Secure Renegotiation IS NOT supported Compression: NONE Expansion: NONE No ALPN negotiated Early data was not sent Verify return code: 0 (ok) --- * OK [CAPABILITY IMAP4rev1 SASL-IR LOGIN-REFERRALS ID ENABLE IDLE LITERAL+ LOGINDISABLED AUTH=EXTERNAL] Dovecot (Debian) ready. Expected: TLS alert during handshake, e.g. on my Apache TLS client certificate required configured instance: $ openssl s_client -connect myserver:443 139676785239360:error:14094410:SSL routines:ssl3_read_bytes:sslv3 alert handshake failure:../ssl/record/rec_layer_s3.c:1543:SSL alert number 40 IOW, I was hoping for something like this to exist: ssl_verify_client_cert = required OR service imap-login { inet_listener imaps { port = 993 ssl = client-cert-required } } Thanks, Gert

2 2

Re: Sieve daemon errors? (Part 1 of 2, Pt 2 to follow when Pt 1 resolved)
by Dan Egli 01 May '21

01 May '21

Ask and ye shall receive: # dovecot -n # 2.3.13 (89f716dc2): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.13 (cdd19fe3) # OS: Linux 5.11.16-gentoo-x86_64 x86_64 Gentoo Base System release 2.7 xfs # Hostname: jupiter.newideatest.site auth_debug = yes auth_mechanisms = plain login auth_socket_path = /run/dovecot/auth-userdb auth_verbose = yes debug_log_path = /var/log/dovecot/debug.log default_vsz_limit = 1 G disable_plaintext_auth = no first_valid_uid = 114 hostname = jupiter.newideatest.site info_log_path = /var/log/dovecot/info.log log_path = /var/log/dovecot/error.log mail_debug = yes mail_gid = exim4u mail_location = maildir:/var/mail/%d/%n/Maildir:INDEX=/var/mail/indexes/%d/%1n/% n mail_plugins = fts mail_privileged_group = mail mail_server_admin = <redacted> mail_uid = exim4u managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto reject envelope encoded-character vacati on subaddress comparator-i;ascii-numeric relational regex imap4flags copy includ e variables body enotify environment mailbox date index ihave duplicate mime for everypart extracttext imapsieve vnd.dovecot.imapsieve namespace inbox { inbox = yes location = mailbox Drafts { special_use = \Drafts } mailbox Junk { special_use = \Junk } mailbox Sent { special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Trash { special_use = \Trash } prefix = } passdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } passdb { args = /etc/dovecot/dovecot-ldap.conf.ext driver = ldap } plugin { fts_autoindex = yes fts_autoindex_exclude = \Junk fts_autoindex_exclude2 = \Trash fts_autoindex_exclude3 = \Drafts fts_autoindex_exclude4 = \Spam fts_enforced = yes imapsieve_mailbox1_before = file:/var/lib/dovecot/sieve/report-spam.sieve imapsieve_mailbox1_causes = COPY imapsieve_mailbox1_name = Spam imapsieve_mailbox2_before = file:/var/lib/dovecot/sieve/report-ham.sieve imapsieve_mailbox2_causes = COPY imapsieve_mailbox2_from = Spam imapsieve_mailbox2_name = * plugin = fts managesieve sieve sieve = file:%h/sieve;active=%h/.dovecot.sieve sieve_Dir = ~/sieve sieve_execute_bin_dir = /usr/lib/dovecot/sieve-execute sieve_filter_bin_dir = /usr/lib/dovecot/sieve-filter sieve_global_dir = /var/lib/dovecot/sieve/ sieve_global_extensions = +vnd.dovecot.pipe +vnd.dovecot.environment sieve_global_path = /var/lib/dovecot/sieve/default.sieve sieve_pipe_bin_dir = /var/lib/dovecot/sieve sieve_plugins = sieve_imapsieve sieve_extprograms } postmaster_address = postmaster(a)newideatest.site service auth { unix_listener auth-client { mode = 0600 user = exim4u } unix_listener auth-userdb { group = exim4u mode = 0777 user = exim4u } } service lmtp { inet_listener lmtp { address = 127.0.0.1 port = 4190 } } service managesieve-login { inet_listener sieve { port = 4190 } process_min_avail = 0 service_count = 1 vsz_limit = 64 M } service managesieve { process_limit = 1024 } service stats { unix_listener stats-reader { mode = 0777 user = exim4u } unix_listener stats-writer { mode = 0777 user = exim4u } } service submission-login { inet_listener submission { port = 2587 } } ssl_cert = </etc/letsencrypt/live/newideatest.site/fullchain.pem ssl_client_ca_dir = /etc/pki/tls/exim_tls/ ssl_dh = # hidden, use -P to show it ssl_key = # hidden, use -P to show it userdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } userdb { args = uid=exim4u gid=exim4u home=/var/mail/%Ld/%Ln driver = static } verbose_ssl = yes protocol lmtp { info_log_path = /var/log/dovecot/lmtp.log log_path = /var/log/dovecot/lmtp-errors.log mail_plugins = fts sieve sieve postmaster_address = postmaster(a)newideatest.site } protocol lda { info_log_path = /var/log/dovecot/lda.log log_path = /var/log/dovecot/lda-errors.log mail_plugins = fts sieve sieve } protocol imap { mail_plugins = fts imap_sieve } protocol sieve { info_log_path = /var/log/dovecot/sieve.log log_path = /var/log/dovecot/sieve-errors.log managesieve_implementation_string = Dovecot managesieve_max_compile_errors = 5 managesieve_max_line_length = 64 k } j On 5/1/2021 12:44 AM, Steve Watt wrote: > > From a little bit of poking around in the source, I wonder if you > somehow have the LMTP listener running on the sieve port. > > The output of doveconf -n will help more than just the 90-sieve.conf. > Also check the dovecot log; I found it helpful (once I figured out how > to configure it) with debugging. > > [ Apologies for top post; brain-damaged MUA in use. ] > > -- > > Steve Watt KD6GGD PP-ASEL-IA factories.words.yappy > > Don't let your schooling get in the way of your education. > > *From:* dovecot <dovecot-bounces(a)dovecot.org> *On Behalf Of *Dan Egli > *Sent:* Friday, April 30, 2021 23:13 > *To:* dovecot(a)dovecot.org > *Subject:* Sieve daemon errors? (Part 1 of 2, Pt 2 to follow when Pt 1 > resolved) > > Folks, I am still trying to get help here. Let me re-state what is > going on. I have a webmail program (SOGo) that connects to the Dovecot > sieve system to handle things like mail filters and what not. That way > dovecot's lda program can move things where they belong. So I went > through the config files, and found the places where I need to enable > sieve (this is in Gentoo Linux, by the way). Now, when dovecot starts > I do see a listener on the sieve port on localhost: > > #netstat -tl | grep sieve > tcp 0 0 localhost:sieve 0.0.0.0:* LISTEN > > And when I telnet to the port, it does connect. But it doesn't say much. > > telnet localhost sieve > Trying 127.0.0.1... > Connected to localhost. > Escape character is '^]'. > 220 jupiter.newideatest.site Dovecot ready. > > Yet every example I see online is showing a HECK of a lot more than > this. So what's up? Anyone got any idea what I did wrong? I've put the > 90-sieve.conf file on my web server at > www.newideatest.site/90-sieve.conf > <http://www.newideatest.site/90-sieve.conf> for those who want to see > it. If any other config files are wanted/needed to help figure this > out, let me know what they are and I'll take care of it. Here's an > example of what other websites I've looked at say I SHOULD see: > > Trying 162.243.12.140... > Connected to test3.rtcamp.com. > Escape character is '^]'. > *"IMPLEMENTATION" "Dovecot Pigeonhole"* > *"SIEVE" "fileinto reject envelope encoded-character vacation > subaddress comparator-i;ascii-numeric relational regex imap4flags copy > include variables body enotify environment mailbox date ihave"* > "NOTIFY" "mailto" > "SASL" "PLAIN LOGIN" > "STARTTLS" > "VERSION" "1.0" > OK "Dovecot ready." > so why am I not getting all this? > -- > Dan Egli > From my Test Server -- Dan Egli From my Test Server

3 7

What imap ssl/auth settings work best with MS Outlook?
by Steve Dondley 01 May '21

01 May '21

I repeatedly have a hell of a time getting clients' Outlook software working well with Dovecot. It's hard for me to test myself since I don't have Outlook and it would be impossible to keep up with all the different versions anyway. I've got the following settings, currently: disable_plaintext_auth = yes auth_username_format = %Ln auth_mechanisms = plain login ssl = yes service imap-login { # inet_listener imap { # port = 143 # } inet_listener imaps { port = 993 ssl = yes } } service imap { client_limit = 1 } It always seems to be hit or miss with outlook as to which encryption setting to use, which port to try, etc. With a recent client, I couldn't get them successfully logged in no matter what manual settings we tried. If someone can give me some tips on how to get most versions of Outlook cooperating well with Dovecot, I'd appreciate it.

15 30

Sieve daemon errors? (Part 1 of 2, Pt 2 to follow when Pt 1 resolved)
by Dan Egli 01 May '21

01 May '21

Folks, I am still trying to get help here. Let me re-state what is going on. I have a webmail program (SOGo) that connects to the Dovecot sieve system to handle things like mail filters and what not. That way dovecot's lda program can move things where they belong. So I went through the config files, and found the places where I need to enable sieve (this is in Gentoo Linux, by the way). Now, when dovecot starts I do see a listener on the sieve port on localhost: #netstat -tl | grep sieve tcp 0 0 localhost:sieve 0.0.0.0:* LISTEN And when I telnet to the port, it does connect. But it doesn't say much. telnet localhost sieve Trying 127.0.0.1... Connected to localhost. Escape character is '^]'. 220 jupiter.newideatest.site Dovecot ready. Yet every example I see online is showing a HECK of a lot more than this. So what's up? Anyone got any idea what I did wrong? I've put the 90-sieve.conf file on my web server at www.newideatest.site/90-sieve.conf for those who want to see it. If any other config files are wanted/needed to help figure this out, let me know what they are and I'll take care of it. Here's an example of what other websites I've looked at say I SHOULD see: Trying 162.243.12.140... Connected to test3.rtcamp.com. Escape character is '^]'. *"IMPLEMENTATION" "Dovecot Pigeonhole" "SIEVE" "fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date ihave" *"NOTIFY" "mailto" "SASL" "PLAIN LOGIN" "STARTTLS" "VERSION" "1.0" OK "Dovecot ready." so why am I not getting all this? -- Dan Egli From my Test Server

1 0

how to show FreeIPA/Kerberos Password expired on webmail login
by Robert Kudyba 30 Apr '21

30 Apr '21

Using dovecot-2.3.14-1.fc33.x86_64 with FreeIPA & Kerberos if a user's password is expired in a web mail login, e.g., with Squirrelmail, the user sees: "Unknown user or password incorrect." The dovecot logs show: auth: Debug: client passdb out: FAIL 1 user=ouruser(a)ourdomain.edu code=pass_expired reason=Password expired original_user=ouruser imap-login: Debug: Ignoring unknown passdb extra field: original_user imap-login: Info: Aborted login (password expired): user=< ouruser(a)ourdomain.edu>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, secured, session=<jC/SEjbBGMV/AAAB> Would this be a feature request to show this message to users? Also with debug logging there is a lot of log noise and are these errors normal? Error: passwd-file: open(/etc/dovecot/users) failed: No such file or directory as well as: auth: Debug: http-client: conn x.x.x.x:8084 [1]: Client connection failed (fd=23) auth: Debug: http-client[1]: peer x.x.x.x:8084: Connection failed (1 connections exist, 0 pending) auth: Debug: http-client: peer x.x.x.x:8084: Failed to make connection (1 connections exist, 0 pending) auth: Debug: http-client[1]: peer x.x.x.x:8084: Failed to establish any connection within our peer pool: connect(x.x.x.x:8084) failed: Connection refused (1 connections exist, 0 pending) auth: Debug: http-client[1]: queue https://x.x.x.x:8084: Failed to set up connection to x.x.x.x:8084 (SSL=x.x.x.x): connect(x.x.x.x:8084) failed: Connection refused (1 peers pending, 1 requests pending) auth: Debug: http-client[1]: peer x.x.x.x:8084: Unlinked queue https://x.x.x.x:8084 (0 queues linked) auth: Debug: http-client[1]: queue https://x.x.x.x:8084: Failed to set up any connection; failing all queued requests auth: Debug: http-client[1]: request [Req1: POST https://x.x.x.x:8084/?command=allow] Error: 9003 connect(x.x.x.x:8084) failed: Connection refused auth: Debug: http-client[1]: queue https://x.x.x.x:8084: Dropping request [Req1: POST https://x.x.x.x:8084/?command=allow] auth: Debug: http-client: host x.x.x.x: Host is idle (timeout = 100 msecs) auth: Error: policy(ouruser(a)ourdomain.edu,127.0.0.1,<jC/SEjbBGMV/AAAB>): Policy server HTTP error: connect(x.x.x.x:8084) failed: Connection refused

1 0

Installation Question: Is a web server required ?
by White, Daniel E. (GSFC-770.0)[NICS] 29 Apr '21

29 Apr '21

Can Dovecot be installed with Postfix and without being behind a web server ? I want a mail service that can only be accessed by POP3(s)/IMAP(s) and not by a web UI. Thanks.

6 8

Re: Installation Question: Is a web server required ?
by White, Daniel E. (GSFC-770.0)[NICS] 28 Apr '21

28 Apr '21

If you push the car off a cliff, it will fly for a few seconds. Thanks for responding. -----Original Message----- From: dovecot <dovecot-bounces(a)dovecot.org> on behalf of Benny Pedersen <me(a)junc.eu> Organization: junc.eu Date: Wednesday, April 28, 2021 at 13:43 To: "dovecot(a)dovecot.org" <dovecot(a)dovecot.org> Subject: [EXTERNAL] Re: Installation Question: Is a web server required ? On 2021-04-28 19:28, White, Daniel E. (GSFC-770.0)[NICS] wrote: > Can Dovecot be installed with Postfix and without being behind a web > server ? > > I want a mail service that can only be accessed by POP3(s)/IMAP(s) and > not by a web UI. can a car fly without gasoline ? :=) none of the above software require x11 not even roundcube

1 0

Re: Installation Question: Is a web server required ?
by White, Daniel E. (GSFC-770.0)[NICS] 28 Apr '21

28 Apr '21

Thanks. That is what we want. Just mail, no extras -----Original Message----- From: dovecot <dovecot-bounces(a)dovecot.org> on behalf of Heiko Schlittermann <hs(a)schlittermann.de> Organization: schlittermann -- internet & unix support Date: Wednesday, April 28, 2021 at 13:36 To: <dovecot(a)dovecot.org> Subject: [EXTERNAL] Re: Installation Question: Is a web server required ? White, Daniel E. (GSFC-770.0)[NICS] <daniel.e.white(a)nasa.gov> (Mi 28 Apr 2021 19:28:41 CEST): > Can Dovecot be installed with Postfix and without being behind a web server ? Yes. > I want a mail service that can only be accessed by POP3(s)/IMAP(s) and not by a web UI. Dovecot is a pure POP3/IMAP server. No Web-UI is required/provided. (I think, there are other "modules" planned or working already, like calendar or such. But maybe I'm confusing this with alternative mail access server software.) -- Heiko

1 0

connection closes every 10 minutes
by Marco Fioretti 28 Apr '21

28 Apr '21

Greetings, I use mutt on Ubuntu to access my IMAP mailboxes, on my Centos email server that runs dovecot. Everything has worked without problems for years. About one week ago, the connection between mutt and dovecot became unstable. Before, I could leave mutt connected for days in a row, no problem. Now, everything still works fine, except... I get every ten minutes I get "connection timed out" in Mutt's status line, and hundreds of messages like Apr 12 16:12:49 SERVERNAME dovecot: imap(ACCOUNTNAME): Logged out in=164 out=757 what puzzles me is that I did not touch anything both on my server and on my desktop, except an "apt-get update" some days before this started. But cannot see how it would be related anyway, nor have I found anything online like this. Any help to understand what happened and fix it is very welcome. Marco

3 4

Help with imapc and Shared Folder in a Cluster
by Alessio Cecchi 28 Apr '21

28 Apr '21

Hi, I'm tryng to setup Shared Mailboxes in Dovecot (2.3.14) Cluster as explained here: https://doc.dovecot.org/configuration_manual/shared_mailboxes/cluster_setup/ but I'm not happy: # doveadm acl debug -u test1(a)emailtest.net shared/test2/Sent doveadm(test1(a)emailtest.net): Info: imapc(10.0.0.202:143): Connected to 10.0.0.202:143 (local 10.0.0.203:58054) doveadm(test1(a)emailtest.net): Info: imapc(10.0.0.202:143): Connected to 10.0.0.202:143 (local 10.0.0.203:58056) doveadm(test1(a)emailtest.net): Error: imapc(10.0.0.202:143): Authentication failed: [AUTHENTICATIONFAILED] Authentication failed. doveadm(test1(a)emailtest.net): Error: Can't open mailbox shared/test2/Sent: Authentication failed: [AUTHENTICATIONFAILED] Authentication failed. ACL, master-user, master-password works fine because with regular configuration shared folders works fine and also with master-user or with master-password I can login and see and access to shared/ namespace and shared folders. But when I try to switch location from location = maildir:%%h/Maildir:INDEX=~/Maildir/shared/%%u to location = imapc:~/Maildir/shared/%%u/ [...] imapc_host = 10.0.0.202 imapc_master_user = %u #imapc_user = %u imapc_password = Password imapc_features = search stop working. The relevant error is this: Apr 22 22:57:14 doveadm(test1(a)testemail.net): Info: imapc(10.0.0.203:143): Connected to 10.0.0.202:143 (local 10.0.0.203:58070) Apr 22 22:57:14 doveadm(test1(a)testemail.net): Debug: imapc(10.0.0.203:143): Server capabilities: IMAP4rev1 SASL-IR LOGIN-REFERRALS ID ENABLE IDLE XLIST LITERAL+ AUTH=PLAIN AUTH=LOGIN Apr 22 22:57:14 doveadm(test1(a)testemail.net): Debug: imapc(10.0.0.203:143): Authenticating as test1(a)testemail.net for user test2(a)testemail.net Apr 22 22:57:16 doveadm(test1(a)testemail.net): Error: imapc(10.0.0.203:143): Authentication failed: [AUTHENTICATIONFAILED] Authentication failed. Apr 22 22:57:16 doveadm(test1(a)testemail.net): Debug: imapc(10.0.0.203:143): Disconnected Apr 22 22:57:16 doveadm(test1(a)testemail.net): Error: Can't open mailbox shared/test2/Sent: Authentication failed: [AUTHENTICATIONFAILED] Authentication failed. Please note "Authenticating as test1(a)testemail.net for user test2(a)testemail.net" failed. So my question is, the documentation page is update and right or I missing something? Someone have this setup workings? Follow the doveadm acl debug and my dovecot configuration: # doveadm -Dv acl debug -u test1(a)testemail.net shared/test2/Sent Apr 22 22:56:08 Debug: Loading modules from directory: /usr/lib64/dovecot Apr 22 22:56:08 Debug: Module loaded: /usr/lib64/dovecot/lib01_acl_plugin.so Apr 22 22:56:08 Debug: Module loaded: /usr/lib64/dovecot/lib10_quota_plugin.so Apr 22 22:56:08 Debug: Module loaded: /usr/lib64/dovecot/lib20_fts_plugin.so Apr 22 22:56:08 Debug: Module loaded: /usr/lib64/dovecot/lib20_virtual_plugin.so Apr 22 22:56:08 Debug: Module loaded: /usr/lib64/dovecot/lib20_zlib_plugin.so Apr 22 22:56:08 Debug: Module loaded: /usr/lib64/dovecot/lib21_fts_solr_plugin.so Apr 22 22:56:08 Debug: Loading modules from directory: /usr/lib64/dovecot/doveadm Apr 22 22:56:08 Debug: Module loaded: /usr/lib64/dovecot/doveadm/lib10_doveadm_acl_plugin.so Apr 22 22:56:08 Debug: Module loaded: /usr/lib64/dovecot/doveadm/lib10_doveadm_quota_plugin.so Apr 22 22:56:08 Debug: Module loaded: /usr/lib64/dovecot/doveadm/lib10_doveadm_sieve_plugin.so Apr 22 22:56:08 Debug: Skipping module doveadm_fts_lucene_plugin, because dlopen() failed: /usr/lib64/dovecot/doveadm/lib20_doveadm_fts_lucene_plugin.so: undefined symbol: lucene_index_iter_deinit (this is usually intentional, so just ignore this message) Apr 22 22:56:08 Debug: Module loaded: /usr/lib64/dovecot/doveadm/lib20_doveadm_fts_plugin.so Apr 22 22:56:08 Debug: Skipping module doveadm_mail_crypt_plugin, because dlopen() failed: /usr/lib64/dovecot/doveadm/libdoveadm_mail_crypt_plugin.so: undefined symbol: mail_crypt_box_get_pvt_digests (this is usually intentional, so just ignore this message) Apr 22 22:56:08 doveadm(test1(a)testemail.net) session=<>: Debug: auth-master: userdb lookup(test1(a)testemail.net): Started userdb lookup Apr 22 22:56:08 doveadm(test1(a)testemail.net) session=<>: Debug: auth-master: conn unix:/var/run/dovecot/auth-userdb: Connecting Apr 22 22:56:08 doveadm(test1(a)testemail.net) session=<>: Debug: auth-master: conn unix:/var/run/dovecot/auth-userdb (pid=19783,uid=0): Client connected (fd=10) Apr 22 22:56:08 doveadm(test1(a)testemail.net) session=<>: Debug: auth-master: userdb lookup(test1(a)testemail.net): auth USER input: test1(a)testemail.net home=/home/vmail/testemail.net/test1 uid=89 gid=89 quota_rule=*:backend=8589934592S,229376C Apr 22 22:56:08 doveadm(test1(a)testemail.net) session=<>: Debug: auth-master: userdb lookup(test1(a)testemail.net): Finished userdb lookup (username=test1(a)testemail.net home=/home/vmail/testemail.net/test1 uid=89 gid=89 quota_rule=*:backend=8589934592S,229376C) Apr 22 22:56:08 doveadm(test1(a)testemail.net) session=<>: Debug: Added userdb setting: plugin/quota_rule=*:backend=8589934592S,229376C Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: Effective uid=89, gid=89, home=/home/vmail/testemail.net/test1 Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: Quota root: name=UserQuota backend=maildir args= Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: Quota rule: root=UserQuota mailbox=* bytes=8589934592 messages=229376 Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: Quota rule: root=UserQuota mailbox=Trash bytes=+104857600 messages=0 Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: Quota warning: bytes=8160437862 (95%) messages=0 reverse=no command=quota-warning 95 test1(a)testemail.net 2 Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: Quota warning: bytes=7730941132 (90%) messages=0 reverse=no command=quota-warning 90 test1(a)testemail.net 1 Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: Quota warning: bytes=7301444403 (85%) messages=0 reverse=yes command=quota-warning 85 test1(a)testemail.net 0 Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: Quota grace: root=UserQuota bytes=10485760 Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: Quota root: name=Quota Usage backend=dict args=:noenforcing:proxy::sqlquota Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: Quota grace: root=Quota Usage bytes=0 (10%) Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: quota-dict: user=test1(a)testemail.net, uri=proxy::sqlquota, noenforcing=1 Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: Namespace inbox: type=private, prefix=, sep=/, inbox=yes, hidden=no, list=yes, subscriptions=yes location=maildir:~/Maildir Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: maildir++: root=/home/vmail/testemail.net/test1/Maildir, index=, indexpvt=, control=, inbox=/home/vmail/testemail.net/test1/Maildir, alt= Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: acl: initializing backend with data: vfile Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: acl: acl username = test1(a)testemail.net Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: acl: owner = 1 Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: acl vfile: Global ACLs disabled Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: Namespace : type=shared, prefix=shared/%n/, sep=/, inbox=no, hidden=no, list=children, subscriptions=no location=imapc:~/Maildir/shared/%u/ Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: shared: root=/var/run/dovecot, index=, indexpvt=, control=, inbox=, alt= Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: fts: Indexes disabled for namespace 'shared/%n/' Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: acl: initializing backend with data: vfile Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: acl: acl username = test1(a)testemail.net Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: acl: owner = 0 Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: acl vfile: Global ACLs disabled Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: Namespace Virtual: type=private, prefix=Virtual/, sep=/, inbox=no, hidden=yes, list=no, subscriptions=no location=virtual:/etc/dovecot/virtual:INDEX=~/Maildir/virtual Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: fs: root=/etc/dovecot/virtual, index=/home/vmail/testemail.net/test1/Maildir/virtual, indexpvt=, control=, inbox=, alt= Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: acl: initializing backend with data: vfile Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: acl: acl username = test1(a)testemail.net Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: acl: owner = 1 Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: acl vfile: Global ACLs disabled Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: quota: quota_over_flag check: quota_over_script unset - skipping Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: quota: quota_over_flag check: quota2_over_script unset - skipping Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: auth-master: userdb lookup(test2(a)testemail.net): Started userdb lookup Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: auth-master: userdb lookup(test2(a)testemail.net): auth USER input: test2(a)testemail.net home=/home/vmail/testemail.net/test2 uid=89 gid=89 quota_rule=*:backend=8589934592S,229376C Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: auth-master: userdb lookup(test2(a)testemail.net): Finished userdb lookup (username=test2(a)testemail.net home=/home/vmail/testemail.net/test2 uid=89 gid=89 quota_rule=*:backend=8589934592S,229376C) Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: Quota root: name=UserQuota backend=maildir args= Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: Quota rule: root=UserQuota mailbox=* bytes=8589934592 messages=229376 Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: Quota rule: root=UserQuota mailbox=Trash bytes=+104857600 messages=0 Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: Quota warning: bytes=8160437862 (95%) messages=0 reverse=no command=quota-warning 95 test2(a)testemail.net 2 Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: Quota warning: bytes=7730941132 (90%) messages=0 reverse=no command=quota-warning 90 test2(a)testemail.net 1 Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: Quota warning: bytes=7301444403 (85%) messages=0 reverse=yes command=quota-warning 85 test2(a)testemail.net 0 Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: Quota grace: root=UserQuota bytes=10485760 Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: Quota root: name=Quota Usage backend=dict args=:noenforcing:proxy::sqlquota Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: Quota grace: root=Quota Usage bytes=0 (10%) Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: quota-dict: user=test2(a)testemail.net, uri=proxy::sqlquota, noenforcing=1 Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: imapc(10.0.0.203:143): Created new connection Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: imapc(10.0.0.203:143): Looking up IP address (reconnect_ok=true, last_connect=1619124968) Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: imapc(10.0.0.203:143): Connecting to 10.0.0.202:143 Apr 22 22:56:08 doveadm(test1(a)testemail.net): Info: imapc(10.0.0.203:143): Connected to 10.0.0.202:143 (local 10.0.0.203:58062) Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: imapc(10.0.0.203:143): Server capabilities: IMAP4rev1 SASL-IR LOGIN-REFERRALS ID ENABLE IDLE XLIST LITERAL+ AUTH=PLAIN AUTH=LOGIN Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: imapc(10.0.0.203:143): Authenticating as test2(a)testemail.net for user test2(a)testemail.net Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: imapc(10.0.0.203:143): Server capabilities: IMAP4rev1 SASL-IR LOGIN-REFERRALS ID ENABLE IDLE SORT SORT=DISPLAY THREAD=REFERENCES THREAD=REFS THREAD=ORDEREDSUBJECT MULTIAPPEND URL-PARTIAL CATENATE UNSELECT CHILDREN NAMESPACE UIDPLUS LIST-EXTENDED I18NLEVEL=1 CONDSTORE QRESYNC ESEARCH ESORT SEARCHRES WITHIN CONTEXT=SEARCH LIST-STATUS BINARY MOVE SNIPPET=FUZZY PREVIEW=FUZZY STATUS=SIZE SAVEDATE XLIST LITERAL+ NOTIFY SPECIAL-USE QUOTA ACL RIGHTS=texk Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: imapc(10.0.0.203:143): Authenticated successfully Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: imapc: root=/home/vmail/testemail.net/test2/Maildir/shared/test2@testemail.net, index=, indexpvt=, control=, inbox=, alt= Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: maildir++: root=/home/vmail/testemail.net/test2/Maildir/shared/test2@testemail.net, index=, indexpvt=, control=, inbox=, alt= Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: acl: initializing backend with data: vfile Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: acl: acl username = test2(a)testemail.net Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: acl: owner = 1 Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: acl vfile: Global ACLs disabled Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: quota: quota_over_flag check: quota_over_script unset - skipping Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: quota: quota_over_flag check: quota2_over_script unset - skipping Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: imapc(10.0.0.203:143): Created new connection Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: imapc(10.0.0.203:143): Looking up IP address (reconnect_ok=true, last_connect=1619124968) Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: imapc(10.0.0.203:143): Connecting to 10.0.0.202:143 Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: imapc: root=/home/vmail/testemail.net/test1/Maildir/shared/test2@testemail.net, index=, indexpvt=, control=, inbox=, alt= Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: maildir++: root=/home/vmail/testemail.net/test1/Maildir/shared/test2@testemail.net, index=, indexpvt=, control=, inbox=, alt= Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: acl: initializing backend with data: vfile Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: acl: acl username = test1(a)testemail.net Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: acl: owner = 0 Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: acl vfile: Global ACLs disabled Apr 22 22:56:08 doveadm(test1(a)testemail.net): Info: imapc(10.0.0.203:143): Connected to 10.0.0.202:143 (local 10.0.0.203:58064) Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: imapc(10.0.0.203:143): Server capabilities: IMAP4rev1 SASL-IR LOGIN-REFERRALS ID ENABLE IDLE XLIST LITERAL+ AUTH=PLAIN AUTH=LOGIN Apr 22 22:56:08 doveadm(test1(a)testemail.net): Debug: imapc(10.0.0.203:143): Authenticating as test1(a)testemail.net for user test2(a)testemail.net Apr 22 22:56:10 doveadm(test1(a)testemail.net): Error: imapc(10.0.0.203:143): Authentication failed: [AUTHENTICATIONFAILED] Authentication failed. Apr 22 22:56:10 doveadm(test1(a)testemail.net): Debug: imapc(10.0.0.203:143): Disconnected Apr 22 22:56:10 doveadm(test1(a)testemail.net): Error: Can't open mailbox shared/test2/Sent: Authentication failed: [AUTHENTICATIONFAILED] Authentication failed. Apr 22 22:56:10 doveadm(test1(a)testemail.net): Debug: imapc(10.0.0.203:143): Disconnected Apr 22 22:56:10 doveadm(test1(a)testemail.net): Debug: auth-master: conn unix:/var/run/dovecot/auth-userdb (pid=19783,uid=0): Disconnected: Connection closed (fd=10) # dovecot -n # 2.3.14 (cee3cbc0d): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.14 (1b5c82b2) # OS: Linux 3.10.0-1160.24.1.el7.x86_64 x86_64 CentOS Linux release 7.9.2009 (Core) # Hostname: popimap.emailtest.net auth_cache_negative_ttl = 90 secs auth_cache_size = 50 M auth_debug = yes auth_debug_passwords = yes auth_master_user_separator = * auth_mechanisms = plain login auth_verbose = yes auth_verbose_passwords = plain auth_worker_max_count = 50 default_vsz_limit = 1 G deliver_log_format = deliverytime=%{delivery_time}, msgid=%m, sender=%e, from=%f, subject="%s": %$ dict { acl = mysql:/etc/dovecot/dovecot-dict-sql.conf.ext sieve = mysql:/etc/dovecot/dovecot-dict-sieve-sql.conf.ext sqlquota = mysql:/etc/dovecot/dovecot-dict-sql.conf.ext } disable_plaintext_auth = no first_valid_gid = 89 first_valid_uid = 89 imap_capability = +XLIST imap_client_workarounds = delay-newmail tb-extra-mailbox-sep tb-lsub-flags imap_id_log = * imap_logout_format = in=%{input} out=%{output} deleted=%{deleted} expunged=%{expunged} autoexpunged=%{autoexpunged} trashed=%{trashed} appended=%{appended} hdr_count=%{fetch_hdr_count} hdr_bytes=%{fetch_hdr_bytes} body_count=%{fetch_body_count} body_bytes=%{fetch_body_bytes} imap_max_line_length = 2 M imapc_features = search imapc_host = 10.0.0.202 imapc_master_user = %u imapc_password = # hidden, use -P to show it last_valid_gid = 89 last_valid_uid = 89 lda_mailbox_autocreate = yes lda_mailbox_autosubscribe = yes login_trusted_networks = 10.0.0.0/24 10.0.1.0/24 mail_attachment_detection_options = add-flags content-type=!image/* mail_attribute_dict = file:%h/Maildir/dovecot-attributes mail_fsync = always mail_location = maildir:~/Maildir mail_log_prefix = "%s(%u) session=<%{session}>: " mail_plugins = quota acl zlib fts fts_solr virtual maildir_very_dirty_syncs = yes managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date index ihave duplicate mime foreverypart extracttext vacation-seconds mmap_disable = yes namespace { list = children location = maildir:%%h/Maildir:INDEX=~/Maildir/shared/%%u prefix = shared/%%n/ separator = / subscriptions = no type = shared } namespace Virtual { hidden = yes list = no location = virtual:/etc/dovecot/virtual:INDEX=~/Maildir/virtual prefix = Virtual/ separator = / subscriptions = no } namespace inbox { inbox = yes location = mailbox Archive { auto = subscribe special_use = \Archive } mailbox Drafts { auto = subscribe special_use = \Drafts } mailbox Sent { auto = subscribe special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Spam { auto = subscribe special_use = \Junk } mailbox Trash { auto = subscribe special_use = \Trash } mailbox virtual/All { comment = All my messages special_use = \All } prefix = separator = / } passdb { args = /etc/dovecot/dovecot-deny-sql.conf.ext deny = yes driver = sql } passdb { args = password=#hidden_use-P_to_show# driver = static result_success = continue } passdb { args = /etc/dovecot/extra/master-users driver = passwd-file master = yes result_success = continue } passdb { args = /etc/dovecot/dovecot-sql.conf.ext auth_verbose = yes driver = sql result_success = continue-ok } passdb { args = /etc/dovecot/extra/extrafields-passdb driver = passwd-file result_internalfail = return-fail skip = unauthenticated } plugin { acl = vfile acl_ignore_namespace = shared/* acl_shared_dict = proxy::acl fts = solr fts_autoindex = no fts_index_timeout = 60s fts_solr = url=http://10.0.0.5:8983/solr/dovecot/ debug fts_tika = http://10.0.0.206:9998/tika/ master_user = %u push_notification_driver = ox:url=http://10.0.0.235/notify quota = maildir:UserQuota quota2 = dict:Quota Usage::noenforcing:proxy::sqlquota quota_grace = 10M quota_max_mail_size = 60M quota_rule2 = Trash:storage=+100M quota_warning = storage=95%% quota-warning 95 %u 2 quota_warning2 = storage=90%% quota-warning 90 %u 1 quota_warning3 = -storage=85%% quota-warning 85 %u 0 sieve = file:~/sieve;active=~/.dovecot.sieve sieve_before = dict:proxy::sieve;name=activesql sieve_before2 = /etc/dovecot/sieve/before.sieve sieve_duplicate_default_period = 1h sieve_duplicate_max_period = 1d sieve_extensions = +vacation-seconds sieve_max_redirects = 25 sieve_vacation_default_period = 1d sieve_vacation_min_period = 4h sieve_vacation_send_from_recipient = yes zlib_save = gz zlib_save_level = 6 } pop3_client_workarounds = outlook-no-nuls oe-ns-eoh pop3_fast_size_lookups = yes pop3_logout_format = top=%t/%p, retr=%r/%b, del=%d/%{deleted_bytes}/%m, size=%s, bytes=%i/%o protocols = imap pop3 lmtp sieve service auth { client_limit = 6524 unix_listener auth-userdb { group = vchkpw mode = 0660 user = vmail } } service dict { process_limit = 500 unix_listener dict { group = vchkpw mode = 0660 user = vmail } } service doveadm { inet_listener { port = 2425 } } service imap-login { process_min_avail = 12 service_count = 0 } service imap-postlogin { executable = script-login /etc/dovecot/scripts/imap-postlogin.sh unix_listener imap-postlogin { group = vchkpw mode = 0660 user = vmail } user = vmail } service imap { executable = imap imap-postlogin process_limit = 8000 vsz_limit = 2 G } service lmtp { inet_listener lmtp { port = 24 } process_min_avail = 12 } service managesieve-login { inet_listener sieve { port = 4190 } } service pop3-login { process_min_avail = 12 service_count = 0 } service pop3-postlogin { executable = script-login /etc/dovecot/scripts/pop3-postlogin.sh unix_listener pop3-postlogin { group = vchkpw mode = 0660 user = vmail } user = vmail } service pop3 { executable = pop3 pop3-postlogin } service quota-warning { executable = script /etc/dovecot/scripts/quota-warning.sh unix_listener quota-warning { user = vmail } user = vmail } service stats { client_limit = 10240 unix_listener stats-writer { group = vchkpw mode = 0660 user = vmail } } ssl = no submission_host = 127.0.0.1 userdb { driver = prefetch } userdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } verbose_proctitle = yes protocol lmtp { mail_fsync = optimized mail_plugins = quota acl zlib fts fts_solr virtual sieve notify push_notification namespace inbox { location = mailbox Spam { autoexpunge = 31 days } mailbox Trash { autoexpunge = 31 days } prefix = } } protocol lda { mail_fsync = optimized mail_plugins = quota acl zlib fts fts_solr virtual sieve notify push_notification } protocol imap { mail_max_userip_connections = 10 mail_plugins = quota acl zlib fts fts_solr virtual imap_quota imap_acl namespace inbox { location = mailbox Spam { autoexpunge = 31 days } mailbox Trash { autoexpunge = 31 days } prefix = } } protocol sieve { mail_max_userip_connections = 2 } protocol pop3 { mail_max_userip_connections = 15 } remote 10.0.1.0/24 { protocol imap { imap_metadata = yes } } local 10.0.0.0/24 { doveadm_password = # hidden, use -P to show it } Thanks -- Alessio Cecchi Postmaster @ http://www.qboxmail.it https://www.linkedin.com/in/alessice

2 6

How to omit the DH parameter in v2.3.3+ ( as stated in 'Upgrading Dovecot v2.2 to v2.3' )
by J. Sommersberg 27 Apr '21

27 Apr '21

Hi, i just finished tuning my dovecot setup after upgrading to 2.3.7.2. I needed to add the "ssl_dh =„ parameter to my config as stated in the online docs at dovecot.org <http://dovecot.org/>. That was no problem and is well documented there and the hint in the log on startup also helped to quickly identify the problem. After that i was curious and read more and did a lot of research. But i just could not find out how to „omit“ the DH parameter as stated in the online docs: https://doc.dovecot.org/installation_guide/upgrading/from-2.2-to-2.3/ <https://doc.dovecot.org/installation_guide/upgrading/from-2.2-to-2.3/> It says : „Since v2.3.3+ DH parameter usage is optional and can be omitted.“ I trried it in different ways. First i disallowed DH on the ssl_cipher_list like it was suggested in the example in this doc. But it will still give Errors on startup/reload of dovecot. Next i tried ssl_dh = that also did not work. I could not figure out how to „omit“ the DH parameter. Is it just my misinterpretation of the config doc? thanks for clarifying Best regards joerg

2 1

doveadm sync duplicating emails
by Paul Robinson 27 Apr '21

27 Apr '21

I'm upgrading a mail server using postfix 2.9.6 and dovecot 2.0.19 to a new server running postfix 3.4.13 and dovecot 2.3.7.2 (using Maildir format on both sides). I had trouble getting doveadm backup to work for one user, while all the others worked straight away. It would complain about problems on the old server in the Maildir/dovecot* files. I managed to get it to work by removing all the dovecot* files under Maildir for that one user (accepting that this would mean clients having to redownload emails). >From that point, a doveadm backup worked. Using roundcube to look at the new mail server, I could see everything arrived. At this point, some mail generated on the new mail server would go to the new mail server, but all other mail is going to the old mail server. I then tried to use doveadm sync -1R to update the new mail server so the new server contains all the mail from the old server plus the new mail that has been locally delivered. What then happened was that all the new emails delivered to the old server since the backup were copied to the new server, and all the emails that were locally delivered on the new mail server were still there. (So far so good). But I also saw that every email that was on the old server before the backup now appeared twice on the new mail server. Running sync again would mean I had three copies of email. The sync ran quickly - much too quickly for these extra copies to have been sent over the network. It appears that the sync made extra local copies on the new server. I see no errors in logs that can explain things. Looking at the email, the files stored in the cur directories are there multiple times; they have different names, but identical content. Trying "doveadm deduplicate -F user-list ALL" ran quickly and to no effect (where user-list is a file with a list of users). Trying "doveadm deduplicate -F user-list -m ALL" takes 100% cpu and a long time to run and still running right now after 4 hours. Judging by the disk space usage freed up, this is going to take a very long time to complete. Has anybody got any idea what might cause this and what change I should make? This was the sync command line: doveadm -vc /etc/dovecot/dovecot-migration.conf sync -1RF user-list imapc: For the backup and sync, I used this as the config: imapc_features = rfc822.size fetch-headers imapc_host = <snipped> imapc_ssl = imaps imapc_port = 993 imapc_user = %n imapc_master_user = master imapc_password = <snipped> mail_prefetch_count = 20 ssl_cipher_list = EECDH+AESGCM+AES128:EECDH+AESGCM+AES256:EECDH+CHACHA20:EDH+AESGCM+AES128:EDH+AESGCM+AES256:EDH+CHACHA20:EECDH+SHA256+AES128:EECDH+SHA384+AES256:EDH+SHA256+AES128:EDH+SHA256+AES256:EECDH+SHA1+AES128:EECDH+SHA1+AES256:EDH +SHA1+AES128:EDH+SHA1+AES256:EECDH+HIGH:EDH+HIGH:AESGCM+AES128:AESGCM+AES256:CHACHA20:SHA256+AES128:SHA256+AES256:SHA1+AES128:SHA1+AES256:HIGH:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!3DES:!MD5:!PSK:!KRB5:!aECDH:!DH mail_location = maildir:~/Maildir mail_home = /var/vmail/%d/%n/ mail_fsync=never Thanks, Paul

2 1

failed: Cached message size smaller than expected
by Michael Grant 27 Apr '21

27 Apr '21

Every few days, my mailbox seizes up. No mail come in to my imap clients. I'm getting these errors over and over with my mailbox: Error: Mailbox INBOX: Deleting corrupted cache record uid=371208: UID 371208: Broken physical size in mailbox INBOX: read(/var/mail/mgrant) failed: Cached message size smaller than expected (17212 < 17222, box=INBOX, UID=371208) Error: Mailbox INBOX: UID=371208: read(/var/mail/mgrant) failed: Cached message size smaller than expected (17212 < 17222, box=INBOX, UID=371208) (FETCH BODY[]) Error: Mailbox INBOX: Deleting corrupted cache record uid=371203: UID 371203: Broken physical size in mailbox INBOX: read(/var/mail/mgrant) failed: Cached message size smaller than expected (3904 < 3914, box=INBOX, UID=371203) Error: Mailbox INBOX: UID=371203: read(/var/mail/mgrant) failed: Cached message size smaller than expected (3904 < 3914, box=INBOX, UID=371203) (FETCH BODY[]) My inbox is an mbox file. I'm running dovecot installed on Debian Bullseye, the dovecot packages are all: 1:2.3.13+dfsg1-1 I am running sendmail and using procmail for local delivery. I suspect, but am not certain, that this may be some locking issue between procmail and dovecot but I have never been able to prove that. The final procmail rule which appends messages to my mailbox looks like this, the trailing ':' causes procmail to use a lockfile: :0: /var/mail/mgrant The locking config lines in 10-mail.conf are commented, but I have also tried uncommenting them, did not help: #mbox_read_locks = fcntl #mbox_write_locks = fcntl dotlock Though sometimes it seems to fix itself after a few hours, the only way I have found to fix this quickly is to manually remove the cache files and restart dovecot: rm ~/mail/.imap/INBOX/* systemctl restart dovecot I am not even sure this is a locking issue. Something definitely gets corrupted though. I do have several IMAP clients hitting the same mailbox (phone, laptop, desktop). On the phone, I run K9 and also the gmail client which talks imap. Also using thunderbird, outlook, and w10 mail, though typically not all at the same time. You could definitely say I am stress testing this setup a bit! Any ideas on how to resolve this? Michael Grant

6 10

Dovecot integration w/ FreeIPA expired password as well as if over quota login notice; local user can't login
by Robert Kudyba 26 Apr '21

26 Apr '21

As I continue to test freeipa-server-4.9.3-1, on Fedora 33 with dovecot-2.3.14-1 I've run into the following issues with web mail and Dovecot integration. 1. I followed https://www.freeipa.org/page/Dovecot_IMAPS_Integration_with_FreeIPA_using_S… but I couldn't get web mail to login until I used the suggestion from https://blog.delouw.ch/2017/02/19/integrate-dovecot-imap-with-freeipa-using… and changed logins auth_mechanisms = plain gssapi login which allowed logins of FreeIPA Kerberos users. 2. even with auth_mechanisms = plain gssapi login, I could then no longer login to SquirrelMail webmail with any local Unix (non-Kerberized) users. The dovecot logs show: auth: Error: policy(localuser(a)ourdomain.edu,127.0.0.1,<r2eFe+PAvut/AAAB>): Policy server HTTP error: connect(x.x.x.x:8084) failed: Connection refused auth: Debug: policy(localuser(a)ourdomain.edu,127.0.0.1,<r2eFe+PAvut/AAAB>): Policy report action finished auth: Debug: http-client[1]: request [Req2: POST https://x.x.x.x:8084/?command=report] Destroy (requests left=1) auth: Debug: http-client[1]: request [Req2: POST https://x.x.x.x:8084/?command=report] Free (requests left=0) auth: Debug: http-client: conn x.x.x.x[2]: Connection close auth: Debug: http-client: conn x.x.x.x[2]: Connection disconnect auth: Debug: http-client: conn x.x.x.x[2]: Disconnected: connect() failed: Connection refused (fd=23) auth: Debug: http-client: conn x.x.x.x[2]: Detached peer auth: Debug: http-client: conn x.x.x.x[2]: Connection destroy auth: Debug: http-client: host x.x.x.x: Idle host timed out auth: Debug: http-client: host x.x.x.x: Host destroy auth: Debug: http-client: host x.x.x.x: Host session destroy auth: Debug: http-client[1]: queue https://x.x.x.x:8084: Destroy auth: Debug: client passdb out: FAIL 1 user=localuser(a)ourdomain.edu original_user=localuser imap-login: Debug: Ignoring unknown passdb extra field: original_user imap-login: Info: Aborted login (auth failed, 1 attempts in 3 secs): user=< localuser(a)ourdomain.edu>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, secured, session=<r2eFe+PAvut/AAAB> 3. If a user was over quota there was no way to tell on the webmail page that they were over quota but the dovecot logs show imap(ouruser): Error: mkdir(/path/to/ouruser/mail/.imap) failed: Disk quota exceeded. Would there be a security risk if the web page displayed a warning that could be generalized to inform the user to either check their quota or password reset being needed?

1 0

Live migrating index/control files
by Eirik Rye 26 Apr '21

26 Apr '21

Hello, We are running a director-based dovecot cluster where the user's maildir and the indexes/control files are, for legacy reasons, stored on separate NFS-backends, i.e.: mail_location = maildir:~/Maildir:CONTROL=/mail/control/%1u/%2u/%u:INDEX=/mail/index/%1u/%2u/%u Both ~/Maildir and /mail/{control,index}/ are separate NFS-mounts, and we now want to consolidate all files to the user's home directory instead. The end goal is to stop using NFS altogether. I have devised a four step plan for gradually migrating the index/control files into the user's maildir, on a per-user basis: 1. Kick the user in an attempt to flush the user's index files: `doveadm director kick <username>` 2. Rsync the index/control files into the user's maildir: `rsync -uav /mail/{index,control}/${user:0:1}/${user:0:2}/${user}/ /mail/${user:0:1}/${user:0:2}/${user}/Maildir/;` 3. Update the (redis-based) userdb for the specific user to override mail_location to use the default CONTROL/INDEX locations: `{"mail": "maildir:~/Maildir"}` 4. Kick the user one last time so that they reconnect using the new settings. Unfortunately, after running this for a small batch of users, we recieved a couple reports that their clients had started to resynchronize and redownload their mailboxes, which is exactly what we're trying to avoid. There are no index related error messages related to the few users that reported these issues. From my understanding, clients become confused when the control files are changed or lost (`dovecot-uidlist` and `dovecot-uidvalidity`), so I suspect the kick + rsync + kick procedure is not robust enough for this. Does anyone have any experience with performing such a migration without taking systems offline for the duration? Any suggestions to make this process more transparent for our users, so as to not induce panic when their mailboxes abruptly appear empty? Best regards, Eirik

2 5

How to Easily Set Up a Full-Featured Linux Mail Server on Ubuntu 18.04.5 LTS with iRedMail 1.4.0
by Turritopsis Dohrnii Teo En Ming 26 Apr '21

26 Apr '21

Subject: How to Easily Set Up a Full-Featured Linux Mail Server on Ubuntu 18.04.5 LTS with iRedMail 1.4.0 Good day from Singapore, I followed linuxbabe.com's Xiao Guoan's guide and successfully setup a full featured Linux mail server on Ubuntu 18.04.5 LTS with IRedMail 1.4.0. Author: Mr. Turritopsis Dohrnii Teo En Ming (TARGETED INDIVIDUAL) Country: Singapore Date: 25 April 2021 Sunday Type of Publication: PDF Manual Document Version: 20210425.01 (1st release) ***IMPORTANT NOTICE*** Please note that Turritopsis Dohrnii Teo En Ming’s guide is based on Xiao Guoan’s guide at linuxbabe.com. Reference Guide Used by Teo En Ming: How to Easily Set Up a Full-Featured Mail Server on Ubuntu 18.04 with iRedMail Link: https://www.linuxbabe.com/mail-server/ubuntu-18-04-iredmail-email-server Original Author: Xiao Guoan The following is a list of open-source software that will be automatically installed and configured by iRedMail. • Postfix SMTP server • Dovecot IMAP server • Nginx web server to serve the admin panel and webmail • OpenLDAP, MySQL/MariaDB, or PostgreSQL for storing user information • Amavised-new for DKIM signing and verification • SpamAssassin for anti-spam • ClamAV for anti-virus • Roundcube webmail • SOGo groupware, providing webmail, calendar (CalDAV), contacts (CardDAV), tasks and ActiveSync services. • Fail2ban for protecting SSH • mlmmj mailing list manager • Netdata server monitoring • iRedAPD Postfix policy server for greylisting Redundant Download Links for Teo En Ming's PDF Manual: [1] https://drive.google.com/file/d/1un8sLLmNSMIt7V6blWCvJEgwGvxMbd4B/view?usp=… [2] https://drive.google.com/file/d/1i0vY7kfYkobu563qoI3_qCZg7G7BFoYR/view?usp=… [3] https://drive.google.com/file/d/1U9MFN1EklLbA8TMweLV5ntiSJuBBVkpQ/view?usp=… [4] https://www.docdroid.net/dW70KtS/iredmail-setup-1st-release-pdf [5] https://www.mediafire.com/file/evar7j28knqyoj6/IRedMail+Setup+1st+Release.p… [6] https://www.scribd.com/document/504932780/IRedMail-Setup-1st-Release Mr. Turritopsis Dohrnii Teo En Ming, 43 years old as of 26 April 2021, is a TARGETED INDIVIDUAL living in Singapore. He is an IT Consultant with a System Integrator (SI)/computer firm in Singapore. He is an IT enthusiast. -----BEGIN EMAIL SIGNATURE----- The Gospel for all Targeted Individuals (TIs): [The New York Times] Microwave Weapons Are Prime Suspect in Ills of U.S. Embassy Workers Link: https://www.nytimes.com/2018/09/01/science/sonic-attack-cuba-microwave.html ******************************************************************************************** Singaporean Targeted Individual Mr. Turritopsis Dohrnii Teo En Ming's Academic Qualifications as at 14 Feb 2019 and refugee seeking attempts at the United Nations Refugee Agency Bangkok (21 Mar 2017), in Taiwan (5 Aug 2019) and Australia (25 Dec 2019 to 9 Jan 2020): [1] https://tdtemcerts.wordpress.com/ [2] https://tdtemcerts.blogspot.sg/ [3] https://www.scribd.com/user/270125049/Teo-En-Ming -----END EMAIL SIGNATURE-----

1 0

cannot see my mails
by Jean-Max Reymond 26 Apr '21

26 Apr '21

Hi, After a change of server, I cannot see my mails. postfix is OK and I receive emails. If I send emails, with roundcube or thunderbird, I can see these new sent emails. Access rights seems OK. Dovecot with debug trace does not complain. Any tips ? append_dot_mydomain = no biff = no broken_sasl_auth_clients = yes compatibility_level = 2 content_filter = smtp-amavis:[127.0.0.1]:10024 home_mailbox = Maildir/ local_recipient_maps = $virtual_mailbox_maps local_transport = virtual mailbox_command = /usr/lib/dovecot/deliver -c /etc/dovecot/dovecot.conf -m "${EXTENSION}" message_size_limit = 30720000 milter_default_action = accept milter_protocol = 2 mydestination = localhost non_smtpd_milters = inet:localhost:12345 readme_directory = no slow_destination_concurrency_limit = 2 slow_destination_recipient_limit = 20 smtp_tls_CAfile = /etc/ssl/certs/ca-certificates.crt smtp_use_tls = yes smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu) smtpd_milters = inet:localhost:12345 smtpd_recipient_restrictions = reject_unknown_sender_domain, reject_unknown_recipient_domain, reject_unauth_pipelining, permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination smtpd_sasl_auth_enable = yes smtpd_sasl_authenticated_header = yes smtpd_sasl_local_domain = $myhostname smtpd_sasl_path = private/dovecot-auth smtpd_sasl_security_options = noanonymous smtpd_sasl_type = dovecot smtpd_sender_restrictions = reject_unknown_sender_domain smtpd_tls_auth_only = yes smtpd_tls_cert_file = /etc/dovecot/private/dovecot.pem smtpd_tls_key_file = /etc/dovecot/private/dovecot.key smtpd_tls_mandatory_ciphers = medium smtpd_tls_mandatory_protocols = SSLv3, TLSv1 smtpd_tls_received_header = yes smtpd_use_tls = yes tls_random_source = dev:/dev/urandom transport_maps = hash:/etc/postfix/transport vacation_destination_recipient_limit = 1 virtual_alias_maps = proxy:mysql:/etc/postfix/mysql/virtual_alias_maps.cf virtual_gid_maps = static:8 virtual_mailbox_base = /home/Mails virtual_mailbox_domains = proxy:mysql:/etc/postfix/mysql/virtual_domains_maps.cf virtual_mailbox_limit = 204800000 virtual_mailbox_maps = proxy:mysql:/etc/postfix/mysql/virtual_mailbox_maps.cf virtual_minimum_uid = 8 virtual_transport = virtual virtual_uid_maps = static:8 yahoo_destination_concurrency_limit = 4 yahoo_destination_rate_delay = 1s yahoo_destination_recipient_limit = 2 yahoo_initial_destination_concurrency = 1 -- Jean-Max Reymond CKR Solutions Open Source https://www.ckr-solutions.com

3 9

Panic: file ostream.c: assertion failed when using mail_filter on RHEL8
by Martijn Brinkers (list) 24 Apr '21

24 Apr '21

Hi, I installed dovecot on a new up-to-date RHEL8 test system and configured a simple mail_filter plugin which only copies the input back to the output (i.e., the filter does nothing special). On RHEL8 I get the following panic when saving the mail. The Dovecot version that comes with RHEL8 is dovecot-2.3.8-4.el8.x86_64 The mail_filter works correctly on an Ubuntu machine )2.2.33.2- 1ubuntu4.7) Any idea what's causing this panic on RHEL8 and how to fix it? Kind regards, Martijn Brinkers Log output (panic log is at the bottom) Apr 23 10:35:54 ciphermail-webmail dovecot[18680]: master: Dovecot v2.3.8 (9df20d2db) starting up for imap Apr 23 10:36:17 ciphermail-webmail dovecot[18682]: auth: Debug: Loading modules from directory: /usr/lib64/dovecot/auth Apr 23 10:36:17 ciphermail-webmail dovecot[18682]: auth: Debug: Module loaded: /usr/lib64/dovecot/auth/lib20_auth_var_expand_crypt.so Apr 23 10:36:17 ciphermail-webmail dovecot[18682]: auth: Debug: Module loaded: /usr/lib64/dovecot/auth/libdriver_sqlite.so Apr 23 10:36:17 ciphermail-webmail dovecot[18682]: auth: Debug: Read auth token secret from /var/run/dovecot/auth-token-secret.dat Apr 23 10:36:17 ciphermail-webmail dovecot[18682]: auth: Debug: auth client connected (pid=19771) Apr 23 10:36:17 ciphermail-webmail dovecot[18682]: auth: Debug: client in: AUTH 1 PLAIN service=imap secured se ssion=i7avXaHAuLh/AAAB lip=127.0.0.1 rip=127.0.0.1 lport=143 rport=47288 resp=<hidden> Apr 23 10:36:17 ciphermail-webmail dovecot[18682]: auth: Debug: dict( test(a)example.com,127.0.0.1,<i7avXaHAuLh/AAAB>): Performing passdb lookup Apr 23 10:36:17 ciphermail-webmail dovecot[18682]: auth-worker(19774): Debug: Loading modules from directory: /usr/lib64/dovecot/auth Apr 23 10:36:17 ciphermail-webmail dovecot[18682]: auth-worker(19774): Debug: Module loaded: /usr/lib64/dovecot/auth/lib20_auth_var_expand_crypt.so Apr 23 10:36:17 ciphermail-webmail dovecot[18682]: auth-worker(19774): Debug: Module loaded: /usr/lib64/dovecot/auth/libdriver_sqlite.so Apr 23 10:36:17 ciphermail-webmail dovecot[18682]: auth-worker(19774): Debug: conn unix:auth-worker (pid=19773,uid=97): Server accepted connection (fd=13) Apr 23 10:36:17 ciphermail-webmail dovecot[18682]: auth-worker(19774): Debug: conn unix:auth-worker (pid=19773,uid=97): Sending version handshake Apr 23 10:36:17 ciphermail-webmail dovecot[18682]: auth-worker(19774): Debug: conn unix:auth-worker (pid=19773,uid=97): auth-worker<1>: Handling PASSV request Apr 23 10:36:17 ciphermail-webmail dovecot[18682]: auth-worker(19774): Debug: dict(test(a)example.com,127.0.0.1,<i7avXaHAuLh/AAAB>): Performing passdb lookup Apr 23 10:36:17 ciphermail-webmail dovecot[18682]: auth-worker(19774): Debug: dict(test(a)example.com,127.0.0.1,<i7avXaHAuLh/AAAB>): Lookup: shared/passdb/test(a)example.com/test = {"userdb_email":"test(a)example.com ","userdb_quota_rule":"*:bytes=1073741824","password":"{SSHA256.b64}SF5 hEeUZVO4ydasqNb040KHWGyin791L40BYR8cXf+I0EGeetzq5Cg==","userdb_password ":"test","userdb_home":" /var/vmail/test=40example.com(a)ciphermail.private","user":" test=40example.com(a)ciphermail.private"} Apr 23 10:36:17 ciphermail-webmail dovecot[18682]: auth-worker(19774): Debug: dict(test(a)example.com,127.0.0.1,<i7avXaHAuLh/AAAB>): username changed test(a)example.com -> test=40example.com(a)ciphermail.private Apr 23 10:36:17 ciphermail-webmail dovecot[18682]: auth-worker(19774): Debug: dict(test=40example.com(a)ciphermail.private,127.0.0.1,<i7avXaHAuL h/AAAB>): Finished passdb lookup Apr 23 10:36:17 ciphermail-webmail dovecot[18682]: auth-worker(19774): Debug: conn unix:auth-worker (pid=19773,uid=97): auth-worker<1>: Finished Apr 23 10:36:17 ciphermail-webmail dovecot[18682]: auth: Debug: dict( test(a)example.com,127.0.0.1,<i7avXaHAuLh/AAAB>): username changed test(a)example.com -> test=40example.com(a)ciphermail.private Apr 23 10:36:17 ciphermail-webmail dovecot[18682]: auth: Debug: dict( test=40example.com(a)ciphermail.private,127.0.0.1,<i7avXaHAuLh/AAAB>): Finished passdb lookup Apr 23 10:36:17 ciphermail-webmail dovecot[18682]: auth: Debug: auth( test=40example.com(a)ciphermail.private,127.0.0.1,<i7avXaHAuLh/AAAB>): Auth request finished Apr 23 10:36:17 ciphermail-webmail dovecot[18682]: auth: Debug: client passdb out: OK 1 user=test=40example.com(a)ciphermail.private original_user=test(a)example.com Apr 23 10:36:17 ciphermail-webmail dovecot[18682]: auth: Debug: master in: REQUEST 3373400065 19771 1 603cbf25103fc9a6 77ceabe45f077e40 session_pid=19776 request_auth_token Apr 23 10:36:17 ciphermail-webmail dovecot[18682]: auth: Debug: prefetch(test=40example.com(a)ciphermail.private,127.0.0.1,<i7avXaHAuLh/A AAB>): Performing userdb lookup Apr 23 10:36:17 ciphermail-webmail dovecot[18682]: auth: Debug: prefetch(test=40example.com(a)ciphermail.private,127.0.0.1,<i7avXaHAuLh/A AAB>): success Apr 23 10:36:17 ciphermail-webmail dovecot[18682]: auth: Debug: prefetch(test=40example.com(a)ciphermail.private,127.0.0.1,<i7avXaHAuLh/A AAB>): Finished userdb lookup Apr 23 10:36:17 ciphermail-webmail dovecot[18682]: auth: Debug: master userdb out: USER 3373400065 test=40example.com(a)ciphermail.private email=test(a)example.com quota_rule=*:bytes=1073741824 password=<hidden> home=/var/vmail/test=40example.com(a)ciphermail.private auth_mech= PLAIN auth_token=819d2ad4117e4e4139991fab046e13304880e935 auth_user=test(a)example.com Apr 23 10:36:17 ciphermail-webmail dovecot[18682]: imap-login: Login: user=<test=40example.com(a)ciphermail.private>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=19776, secured, session=<i7avXaHAuLh/AAAB> Apr 23 10:36:17 ciphermail-webmail dovecot[18682]: imap( test=40example.com(a)ciphermail.private)<19776><i7avXaHAuLh/AAAB>: Debug: Loading modules from directory: /usr/lib64/dovecot Apr 23 10:36:17 ciphermail-webmail dovecot[18682]: imap( test=40example.com(a)ciphermail.private)<19776><i7avXaHAuLh/AAAB>: Debug: Module loaded: /usr/lib64/dovecot/lib10_mail_filter_plugin.so Apr 23 10:36:17 ciphermail-webmail dovecot[18682]: imap( test=40example.com(a)ciphermail.private)<19776><i7avXaHAuLh/AAAB>: Debug: Module loaded: /usr/lib64/dovecot/lib10_quota_plugin.so Apr 23 10:36:17 ciphermail-webmail dovecot[18682]: imap( test=40example.com(a)ciphermail.private)<19776><i7avXaHAuLh/AAAB>: Debug: Module loaded: /usr/lib64/dovecot/lib11_imap_quota_plugin.so Apr 23 10:36:17 ciphermail-webmail dovecot[18682]: imap( test=40example.com(a)ciphermail.private)<19776><i7avXaHAuLh/AAAB>: Debug: Added userdb setting: plugin/auth_mech=PLAIN Apr 23 10:36:17 ciphermail-webmail dovecot[18682]: imap( test=40example.com(a)ciphermail.private)<19776><i7avXaHAuLh/AAAB>: Debug: Added userdb setting: plugin/email=test(a)example.com Apr 23 10:36:17 ciphermail-webmail dovecot[18682]: imap( test=40example.com(a)ciphermail.private)<19776><i7avXaHAuLh/AAAB>: Debug: Added userdb setting: plugin/password=<hidden> Apr 23 10:36:17 ciphermail-webmail dovecot[18682]: imap( test=40example.com(a)ciphermail.private)<19776><i7avXaHAuLh/AAAB>: Debug: Added userdb setting: plugin/quota_rule=*:bytes=1073741824 Apr 23 10:36:17 ciphermail-webmail dovecot[18682]: imap( test=40example.com(a)ciphermail.private)<19776><i7avXaHAuLh/AAAB>: Debug: Effective uid=986, gid=983, home=/var/vmail/test=40example.com(a)ciphermail.private Apr 23 10:36:17 ciphermail-webmail dovecot[18682]: imap( test=40example.com(a)ciphermail.private)<19776><i7avXaHAuLh/AAAB>: Debug: mail_filter: Filtering mail_filter via socket /var/run/dovecot/mail- filter Apr 23 10:36:17 ciphermail-webmail dovecot[18682]: imap( test=40example.com(a)ciphermail.private)<19776><i7avXaHAuLh/AAAB>: Debug: mail_filter: Filtering mail_filter_out via socket /var/run/dovecot/mail-filter-out Apr 23 10:36:17 ciphermail-webmail dovecot[18682]: imap( test=40example.com(a)ciphermail.private)<19776><i7avXaHAuLh/AAAB>: Debug: Quota root: name=User quota backend=maildir args= Apr 23 10:36:17 ciphermail-webmail dovecot[18682]: imap( test=40example.com(a)ciphermail.private)<19776><i7avXaHAuLh/AAAB>: Debug: Quota rule: root=User quota mailbox=* bytes=1073741824 messages=0 Apr 23 10:36:17 ciphermail-webmail dovecot[18682]: imap( test=40example.com(a)ciphermail.private)<19776><i7avXaHAuLh/AAAB>: Debug: Quota rule: root=User quota mailbox=Trash bytes=+107374182 (10%) messages=0 Apr 23 10:36:17 ciphermail-webmail dovecot[18682]: imap( test=40example.com(a)ciphermail.private)<19776><i7avXaHAuLh/AAAB>: Debug: Quota grace: root=User quota bytes=107374182 (10%) Apr 23 10:36:17 ciphermail-webmail dovecot[18682]: imap( test=40example.com(a)ciphermail.private)<19776><i7avXaHAuLh/AAAB>: Debug: maildir++: root=/var/vmail/test=40example.com(a)ciphermail.private, index=, indexpvt=, control=, inbox=/var/vmail/test=40example.com(a)ciphermail.private, alt= Apr 23 10:36:17 ciphermail-webmail dovecot[18682]: imap( test=40example.com(a)ciphermail.private)<19776><i7avXaHAuLh/AAAB>: Debug: quota: quota_over_flag check: quota_over_script unset - skipping Apr 23 10:36:17 ciphermail-webmail dovecot[18682]: imap( test=40example.com(a)ciphermail.private)<19776><i7avXaHAuLh/AAAB>: Debug: Mailbox Drafts: Mailbox opened because: APPEND Apr 23 10:36:17 ciphermail-webmail dovecot[18682]: imap( test=40example.com(a)ciphermail.private)<19776><i7avXaHAuLh/AAAB>: Panic: file ostream.c: line 201 (o_stream_flush): assertion failed: (stream- >stream_errno != 0) Apr 23 10:36:17 ciphermail-webmail dovecot[18682]: imap( test=40example.com(a)ciphermail.private)<19776><i7avXaHAuLh/AAAB>: Error: Raw backtrace: /usr/lib64/dovecot/libdovecot.so.0(+0xf895b) [0x7f8f1d3d995b] -> /usr/lib64/dovecot/libdovecot.so.0(+0xf89f7) [0x7f8f1d3d99f7] -> /usr/lib64/dovecot/libdovecot.so.0(+0x55b05) [0x7f8f1d336b05] -> /usr/lib64/dovecot/libdovecot.so.0(+0x5a1bd) [0x7f8f1d33b1bd] -> /usr/lib64/dovecot/libdovecot- storage.so.0(maildir_save_finish+0x99) [0x7f8f1d723fa9] -> /usr/lib64/dovecot/lib10_quota_plugin.so(+0xfcee) [0x7f8f1bd5acee] -> /usr/lib64/dovecot/libdovecot-storage.so.0(mailbox_save_finish+0x7d) [0x7f8f1d6fafdd] -> dovecot/imap(+0x132fd) [0x564a032332fd] -> dovecot/imap(command_exec+0x78) [0x564a03241cd8] -> dovecot/imap(+0x128ad) [0x564a032328ad] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_call_io+0x73) [0x7f8f1d3f10c3] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0x135) [0x7f8f1d3f2775] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_handler_run+0x50) [0x7f8f1d3f1170] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_run+0x48) [0x7f8f1d3f12d8] -> /usr/lib64/dovecot/libdovecot.so.0(master_service_run+0x17) [0x7f8f1d368eb7] -> dovecot/imap(main+0x335) [0x564a03232445] -> /lib64/libc.so.6(__libc_start_main+0xf3) [0x7f8f1ca5b803] -> dovecot/imap(_start+0x2e) [0x564a032325fe] Apr 23 10:36:17 ciphermail-webmail dovecot[18682]: imap(test=40example.com(a)ciphermail.private)<19776><i7avXaHAuLh/AAAB>: Fatal: master: service(imap): child 19776 killed with signal 6 (core not dumped - https://dovecot.org/bugreport.html#coredumps - set /proc/sys/fs/suid_dumpable to 2)

1 1

Why was mail-filter plugin removed in version 2.3.14?
by Martijn Brinkers (list) 23 Apr '21

23 Apr '21

Hi, Mail-filter plugin was removed in version 2.3.14. Any idea why was this removed? Is there a replacement for the mail-filter plugin? Kind regards, Martijn Brinkers

1 0

Size of transaction log file is increasing continuously if dsync is failed
by Duc Anh Do 22 Apr '21

22 Apr '21

Hi Dovecot community, I would like to share a problem I saw a few days ago. Any comment is highly appreciated. *Steps to reproduce* 0. Version of Dovecot I use is v2.3.11.3. 1. Prepare 2 Dovecot backends: - One backend is used as the source of dsync command. Other backend is used as the destination of the dsync command. - Mailbox format is Maildir. Mail dir of two test accounts is empty. 2. Prepare the test account in the source of dsync: - Send a test message to the test account. For example, I use swaks: swaks --server 127.0.0.1 --port 24 --protocol LMTP --to user1@local - Use doveadm expunge command to clean mail dir of the test account: doveadm expunge -u user1@local mailbox INBOX all 3. Prepare the test account in the destination of dsync: - Log in test account via IMAP then select INBOX first: telnet 127.0.0.1 imap ... s login user1@local 1 ... s select INBOX ... s logout - Then perform dsync: doveadm -o imapc_host=backend2.local -o imapc_port=143 -o imapc_user=user1@local -o imapc_password=1 backup -s '' -R -u user1@local imapc: - Confirm error occurs when using dsync: dsync(user1@local): Info: imapc(backend2.local:143): Connected to 192.168.100.2:143 (local 192.168.100.27:58850) dsync(user1@local): Error: Mailbox INBOX sync: mailbox_delete failed: INBOX can't be deleted. AQAAAHm4+Jk= 4. Log in the test account in dsync destination then select INBOX. Repeat many times. I can see the size of the transaction log file is increasing continuously. *Before*: -rw-------. 1 vmail vmail 456 Apr 22 10:54 dovecot.index.log *After*: -rw-------. 1 vmail vmail 544 Apr 22 10:59 dovecot.index.log -rw-------. 1 vmail vmail 632 Apr 22 11:00 dovecot.index.log -rw-------. 1 vmail vmail 720 Apr 22 11:00 dovecot.index.log *Problems* - Size of the transaction log file is increasing continuously. Do you think this is an issue of Dovecot? - The value of *mail_index_log_rotate_max_size* is 1M by default. However the transaction log file dovecot.index.log is not rotated when its size exceeds limit. - Because the size of the transaction log file is too big and it is not rotated, I think "out of memory" error will occur when I try to use IMAP SELECT or POP3 STAT command (if the virtual size limit is small enough). - If "size of the transaction log file is increasing continuously" is an issue, what should I do to avoid it or is there any workaround? I understand I should fix the error *Error: Mailbox INBOX sync: mailbox_delete failed: INBOX can't be deleted* first before doing anything next. I think removing the transaction log file is an understandable workaround. *Investigaton* - About the error *Error: Mailbox INBOX sync: mailbox_delete failed: INBOX can't be deleted*, I can understand the cause after reading this thread https://dovecot.org/pipermail/dovecot/2014-April/095588.html 2) Maildir + INBOX + backup/sync/replicate > In the test scenarios where the INBOX on one side was to be completely > removed, e.g. doveadm backup -R the dsync failed and > nothing was synced to the target. This is because before moving the source > mails to the mailbox, dsync cleans out the old ones ( > -R preserves nothing) and in Maildir the INBOX can not be removed. This is > a feature/not easily solvable, because in Maildir > INBOX is different from other folders. > - The transaction log file is rotated whenever there's any change in index file. I can confirm by sending a test message to the test account in dsync destination. I can see that logic in *src/lib-index/mail-index-sync.c* and *src/lib-index/mail-index-write.c*. After that, the size of the new transaction log file is not increasing anymore. - When the error *Error: Mailbox INBOX sync: mailbox_delete failed: INBOX can't be deleted* occurred, I tried to dump the transaction log file and I saw these records: record: offset=432, type=index-deleted (ext), size=12 record: offset=444, type=index-undeleted (ext), size=12 - Do you think these records relate to the issue that the size of the transaction log file is increasing continuously? - Did the error *Error: Mailbox INBOX sync: mailbox_delete failed: INBOX can't be deleted* make content of transaction log file incomplete/incorrect? Regards, Anh Do

1 0

CA certs for Dovecot-as-client (proxy)
by Peter Mogensen 21 Apr '21

21 Apr '21

Hi, When using proxy=y, ssl=yes (Dovecot 2.3.13) I consistently get this logged when trying to validate the remote server cert. "Disconnected by server: Connection closed: Received invalid SSL certificate: unable to get local issuer certificate: /C=BE/O=GlobalSign nv-sa/CN=AlphaSSL CA - SHA256 - G2 (check ssl_client_ca_* settings?)" As I read the 2.3.x documentation (and the error logged) Dovecot needs to have the trusted CA cert with ssl_client_ca_file or ssl_client_ca_dir. So, I've tried every combination of putting the cert (and the GlobalSign root CA signing it) in ssl_client_ca_dir and individually and as a bundle in ssl_client_ca_file without luck. But even though I can verify the cert with "openssl s_client -connect" and with "openssl verify", no matter what I put in the ssl_client_ca_* settings it seems Dovecot just ignores it. It does complain though, if I point it to a non-existent file, but not if I just fill the file with invalid cert data which can't be parsed. I end up getting in doubt whether it consults the cert data at all. I'm a bit at loss on how to debug this further, short of running it in gdb. "verbose_ssl" doesn't really say anything about the process of find a CA cert to check with. Have I misunderstood the config? /Peter

3 2

systemd timeout on startup after upgrade
by Felix Zielcke 21 Apr '21

21 Apr '21

Hello *, I have upgraded today a Debian buster (stable) system to bullseye (still testing). After upgrade I did a complete reboot of the VM. Dovecot version changed from 1:2.3.4.1-5+deb10u6 to 1:2.3.13+dfsg1-1 `systemctl start dovecot` now complains Job for dovecot.service failed because a timeout was exceeded. As a workaround I set "TimeoutStartSec=infinity" in dovecot.service. But `systemctl status` now says: Active: activating (start) since Sat 2021-04-17 17:53:58 CEST; 1h 23min ago Dovecot itself is working fine without problems. LMTP accepts new mails and IMAP works. It's just that systemd doestn't notice it running. Any idea what causes this? Config is unchanged from the working 2.3.4.1 system. # doveconf -n # 2.3.13 (89f716dc2): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.13 (cdd19fe3) # OS: Linux 5.10.0-6-cloud-amd64 x86_64 Debian bullseye/sid # Hostname: daedalus.z-51.de auth_master_user_separator = * auth_mechanisms = plain login auth_ssl_username_from_cert = yes auth_verbose = yes auth_verbose_passwords = plain default_vsz_limit = 2 G first_valid_uid = 8 import_environment = TZ last_valid_uid = 8 lda_mailbox_autocreate = yes lda_mailbox_autosubscribe = yes login_log_format_elements = user=<%u> method=%m rip=%r lip=%l mpid=%e %c ssl_security=%k login_trusted_networks = 127.0.0.1 ::1 mail_gid = mail mail_location = maildir:~/Maildir mail_plugins = acl zlib quota fts fts_xapian mail_privileged_group = mail mail_uid = mail maildir_very_dirty_syncs = yes managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto reject envelope encoded- character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date index ihave duplicate mime foreverypart extracttext imapsieve vnd.dovecot.imapsieve namespace inbox { inbox = yes location = mailbox Drafts { special_use = \Drafts } mailbox Junk { special_use = \Junk } mailbox Sent { special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Spam { special_use = \Junk } mailbox Trash { special_use = \Trash } prefix = separator = / } passdb { args = scheme=CRYPT username_format=%Lu /etc/dovecot/users driver = passwd-file } plugin { acl = vfile:/etc/dovecot/global-acls:cache_secs=300 fts = xapian fts_autoindex = yes fts_autoindex_exclude = \Junk fts_autoindex_exclude2 = \Trash fts_xapian = partial=3 full=20 attachments=0 verbose=0 imapsieve_mailbox1_before = file:/var/mail/sieve/report-spam.sieve imapsieve_mailbox1_causes = COPY imapsieve_mailbox1_name = Spam imapsieve_mailbox2_before = file:/var/mail/sieve/report-ham.sieve imapsieve_mailbox2_causes = COPY imapsieve_mailbox2_from = Spam imapsieve_mailbox2_name = * sieve = file:~/sieve;active=~/.dovecot.sieve sieve_before = /var/mail/sieve/before.sieve sieve_global_extensions = +vnd.dovecot.pipe +vnd.dovecot.execute sieve_pipe_bin_dir = /var/mail/sieve sieve_plugins = sieve_imapsieve sieve_extprograms sieve_redirect_envelope_from = recipient sieve_vacation_default_period = 1d stats_refresh = 30 secs stats_track_cmds = yes } postmaster_address = postmaster(a)z-51.de protocols = " imap lmtp sieve" service auth-worker { user = $default_internal_user } service auth { unix_listener auth-client { group = Debian-exim mode = 0777 user = Debian-exim } unix_listener auth-userdb { group = Debian-exim mode = 0777 user = Debian-exim } vsz_limit = 2 G } service imap-login { inet_listener imap { port = 143 } inet_listener imaps { port = 993 ssl = yes } } service indexer-worker { vsz_limit = 0 } service lmtp { user = mail } service managesieve-login { inet_listener sieve { address = 127.0.0.1 ::1 port = 4190 } service_count = 1 } service managesieve { process_limit = 1024 } service stats { fifo_listener stats-mail { mode = 0600 user = mail } unix_listener stats-writer { user = mail } } ssl = required ssl_cert = </etc/letsencrypt/live/daedalus.z-51.de/fullchain.pem ssl_client_ca_dir = /etc/ssl/certs ssl_dh = # hidden, use -P to show it ssl_key = # hidden, use -P to show it ssl_prefer_server_ciphers = yes userdb { args = username_format=%Lu /etc/dovecot/users default_fields = uid=mail gid=mail home=/var/mail/%d/%n driver = passwd-file } verbose_proctitle = yes protocol lmtp { auth_username_format = %Lu mail_plugins = acl zlib quota fts fts_xapian sieve } protocol lda { mail_plugins = acl zlib quota fts fts_xapian sieve } protocol imap { mail_plugins = acl zlib quota fts fts_xapian imap_zlib imap_acl imap_quota imap_sieve }

5 9

Planning on setting up Postfix + Dovecot + Webmail + Apache + MariaDB + PHP using Webmin Control Panel in the Cloud
by Turritopsis Dohrnii Teo En Ming 21 Apr '21

21 Apr '21

Subject: Planning on setting up Postfix + Dovecot + Webmail + Apache + MariaDB + PHP using Webmin Control Panel in the Cloud Good day from the Republic of Singapore, I am planning to setup Postfix Email Server + Dovecot IMAP/POP3 Incoming Mail Server + Webmail (Roundcube or Squirrelmail) + Apache Web Server + MariaDB Database Server + PHP using Webmin Control Panel specifically, in the cloud, preferably Amazon EC2. Are there any very good and well written guides on doing this type of setup? I am looking forward to your reply. Thank you very much. Mr. Turritopsis Dohrnii Teo En Ming, 43 years old as of 21 April 2021 Wed, is a TARGETED INDIVIDUAL (TI) living in Singapore. He is an IT Consultant with a System Integrator (SI)/computer firm in Singapore. He is an IT enthusiast. -----BEGIN EMAIL SIGNATURE----- The Gospel for all Targeted Individuals (TIs): [The New York Times] Microwave Weapons Are Prime Suspect in Ills of U.S. Embassy Workers Link: https://www.nytimes.com/2018/09/01/science/sonic-attack-cuba-microwave.html ******************************************************************************************** Singaporean Targeted Individual Mr. Turritopsis Dohrnii Teo En Ming's Academic Qualifications as at 14 Feb 2019 and refugee seeking attempts at the United Nations Refugee Agency Bangkok (21 Mar 2017), in Taiwan (5 Aug 2019) and Australia (25 Dec 2019 to 9 Jan 2020): [1] https://tdtemcerts.wordpress.com/ [2] https://tdtemcerts.blogspot.sg/ [3] https://www.scribd.com/user/270125049/Teo-En-Ming -----END EMAIL SIGNATURE-----

1 0

Dovecot discards mail in a certain situation
by Aleš Pečnik 21 Apr '21

21 Apr '21

Hi all: I'm using Dovecot with Postfix (via LMTP). Because Postfix doesn't de-duplicate recipients, I'm using sieve to drop duplicates, following this recipe: https://serverfault.com/questions/112958/postfix-aliases-and-duplicate-e-ma… A "sieve_before" script contains: require ["duplicate"]; if duplicate { discard; stop; } It works well, except when the recipient is over quota. Dovecot is configured for tempfail in this case: quota_full_tempfail = yes When a mail arrives for a user who's over quota, Postfix logs this: AF4481700032: to=<?@?>, relay=?[private/dovecot-lmtp], delay=0.05, delays=0.05/0/0/0, dsn=4.2.2, status=deferred (host ?[private/dovecot-lmtp] said: 452 4.2.2 <?@?> Quota exceeded (mailbox for user is full) (in reply to end of DATA command)) Approximately 10 minutes later, Postfix retries, and log shows: dovecot: lmtp(?)<1742912><+EYHBXjidmBAmBoAcAY70w>: sieve: msgid=<489132c2-7b77-cd2f-ce60-439f6558ddcf@?>: marked message to be discarded if not explicitly delivered (discard action) postfix/lmtp[1742691]: AF4481700032: to=<?@?>, relay=?[private/dovecot-lmtp], delay=431, delays=431/0/0/0, dsn=2.0.0, status=sent (250 2.0.0 <?@?> +EYHBXjidmBAmBoAcAY70w Saved) postfix/qmgr[421343]: AF4481700032: removed The message is then nowhere to be found: it's not delivered to mailbox, bounce isn't sent to the sender, mail is not in postfix queue. Apparently it's been discarded. I'd say that at first LMTP delivery attempt, sieve records message as seen, even though it is eventually rejected (452 over quota). During second attempt sieve "recognizes" the message as seen before and discards it. (This is just my interpretation of what could be happening.) Is this a bug or have I misconfigured something? My dovecot -n output is below. Thanks for help, Aleš Pečnik # dovecot -n # 2.3.7.2 (3c910f64b): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.7.2 () # OS: Linux 5.4.0-62-generic x86_64 Ubuntu 20.04.1 LTS auth_mechanisms = plain login auth_username_chars = abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890.-_@: auth_username_format = %Ln auth_worker_max_count = 3 default_vsz_limit = 1 G first_valid_gid = 12 first_valid_uid = 8 hostname = something.org last_valid_gid = 12 last_valid_uid = 8 listen = * mail_access_groups = mail mail_location = maildir:/var/dovecot/%u mail_plugins = " quota mailbox_alias mail_log notify acl" mail_privileged_group = mail namespace { location = maildir:/var/dovecot/public:INDEXPVT=/var/dovecot/%n/public prefix = Public. separator = . subscriptions = no type = public } namespace inbox { inbox = yes location = mailbox Drafts { auto = no special_use = \Drafts } mailbox Junk { special_use = \Junk } mailbox Sent { auto = subscribe special_use = \Sent } mailbox "Sent Messages" { auto = no special_use = \Sent } mailbox Trash { auto = no special_use = \Trash } prefix = } passdb { args = /etc/dovecot/dovecot-sql-master.conf.ext driver = sql master = yes pass = yes } passdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } plugin { acl = vfile mailbox_alias_new = Sent Messages mailbox_alias_new2 = Sent Items mailbox_alias_new3 = Deleted Items mailbox_alias_new4 = Deleted Messages mailbox_alias_old = Sent mailbox_alias_old2 = Sent mailbox_alias_old3 = Trash mailbox_alias_old4 = Trash quota = maildir:User quota quota_rule = *:storage=200M quota_rule2 = Trash:storage=+50M quota_warning = storage=95%% quota-warning 95 %u quota_warning2 = storage=80%% quota-warning 80 %u sieve = file:/var/dovecot/%n/sieve;active=/var/dovecot/%n/sieve/active.sieve sieve_before = /var/lib/dovecot/sieve.d/ sieve_extensions = +notify +imapflags +editheader +duplicate } postmaster_address = postmaster(a)something.org protocols = " imap lmtp" quota_full_tempfail = yes service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0660 user = postfix } } service imap-login { inet_listener imap { port = 143 } inet_listener imaps { port = 0 } process_min_avail = 12 service_count = 0 } service imap-postlogin { executable = script-login /etc/dovecot/postlogin.sh user = $default_internal_user } service imap { executable = imap imap-postlogin } service lmtp { unix_listener /var/spool/postfix/private/dovecot-lmtp { group = postfix mode = 0600 user = postfix } } service pop3-login { inet_listener pop3 { port = 0 } inet_listener pop3s { port = 0 } } ssl_cert = </etc/ssl/my.crt ssl_client_ca_dir = /etc/ssl/certs ssl_dh = # hidden, use -P to show it ssl_key = # hidden, use -P to show it userdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } protocol lmtp { mail_plugins = " quota mailbox_alias mail_log notify acl sieve" } protocol lda { mail_plugins = " quota mailbox_alias mail_log notify acl sieve" } protocol imap { mail_max_userip_connections = 30 mail_plugins = " quota mailbox_alias mail_log notify acl imap_quota imap_acl" }

2 2

IMAP session hangs on 8k-long commands if COMPRESS=DEFLATE is enabled
by Guilhem Moulin 21 Apr '21

21 Apr '21

Hi there, Dovecot 2.3.7 appears to hang when the client sends a long command after enabling the IMAP COMPRESS extension [RFC 4978]. PoC script attached along with the doveconf(1) output. Without COMPRESS=DEFLATE, and with the default ‘imap_max_line_length’ value (64k) I'm able send commands up to 65539 bytes long (that's 3 bytes more than 2¹⁶, so maybe the leading tag and the trailing CRLF aren't counted), after which Dovecot rightfully replies with tagged BAD responses. $ COMPRESS=n /tmp/many-fetch.pl 65539 […] C: x UID FETCH 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,… [65539 bytes] S: x OK Fetch completed (0.005 + 0.001 + 0.004 secs). C: x UID FETCH 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,… [65540 bytes] S: x BAD Error in IMAP command UID FETCH: IMAP command line too large (0.001 + 0.001 secs). C: x UID FETCH 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,… [65541 bytes] S: x BAD Error in IMAP command UID FETCH: IMAP command line too large (0.001 + 0.001 secs). With COMPRESS=DEFLATE however, the server never sends anything back when the command size exceeds 8192 bytes: $ COMPRESS=y /tmp/many-fetch.pl 8192 […] S: x OK [READ-ONLY] Examine completed (0.001 + 0.000 secs). C: x UID FETCH 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,… [8191 bytes] S: x OK Fetch completed (0.001 + 0.000 secs). C: x UID FETCH 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,… [8192 bytes] S: x OK Fetch completed (0.001 + 0.000 secs). C: x UID FETCH 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,… [8193 bytes] [ _hangs until the server terminates the session for inactivity_ ] S: * BYE Disconnected for inactivity. strace(1) show that Dovecot didn't send the response, even though the server log indicates that it's able to fully read the command. Interestingly, when setting ‘imap_max_line_length’ to 4096, the server also hangs after receiving a command of size >4096 bytes (instead of replying with a tagged BAD response). $ COMPRESS=y /tmp/many-fetch.pl 4096 C: x UID FETCH 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,… [4095 bytes] S: x OK Fetch completed (0.001 + 0.000 secs). C: x UID FETCH 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,… [4096 bytes] S: x OK Fetch completed (0.001 + 0.000 secs). C: x UID FETCH 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,… [4097 bytes] [ _hangs until the server terminates the session for inactivity_ ] I'm also able to reproduce the buggy behavior against Dovecot versions found in other Debian releases. It's identical with 2.3.4 (Buster), the server also hang past 8192 bytes. 2.2.27 (Stretch) and 2.2.13 (Jessie) are able to send replies to 8k-long commands, but hang past 65536 bytes. For all 3 releases, without COMPRESS=DEFLATE Dovecot doesn't hang and rightfully sends tagged BAD responses to commands of size >65539 bytes. So while the hanging behavior appears to be a long-standing bug, the fact that's it's now hit at min($imap_max_line_length, 8192) instead of $imap_max_line_length seems to be a regression from somewhere between 2.2.27 and 2.3.4. Cheers, -- Guilhem.

3 2

Quota warning invoked twice when moving messages to Trash folder
by Dan Conway 20 Apr '21

20 Apr '21

Hello all, I currently have quota warnings enabled through the following configuration on Dovecot 2.2.19: plugin { quota = dict:User quota::file:%h/Maildir/dovecot-quota quota_warning = storage=100%% quota-warning 100 %u %{userdb:quota_rule} %i quota_warning2 = storage=95%% quota-warning 95 %u %{userdb:quota_rule} %i quota_warning3 = storage=90%% quota-warning 90 %u %{userdb:quota_rule} %i } service quota-warning { executable = script /usr/local/bin/quota-warning.pl group = mailusers unix_listener quota-warning { group = mailusers mode = 0775 } } When using Thunderbird as a client for testing, I fill up an inbox until one of the warnings is invoked. (90%). The script runs, and the mailbox sits at about 93%. When moving a handful of messages to the Trash folder, the 100% quota-warning service is invoked. But getting the quota through 'doveadm quota get -u user' yields that same 93% used. I ran strace on the main process that is taking in IMAP commands from the Thunderbird client. Two lines are worth noting from that output: 134 uid store 2311:2312,2314:2317 +Flags (\\Seen)\r\n", 3619 137 uid move 2311:2312,2314:2317 \"INBOX.Trash\"\r\n", 3553 The first line sets the "Seen" flag on a list of messages, while the second line moves the messages to the "INBOX.Trash" folder. My guess as to what is happening is when the "uid move" command is received, The messages are copied first, then removed from the server, causing the quota to spike for a very short amount of time. Are those suspicions correct? After looking at RFC 6851, Section 3.3 (Semantics of MOVE and UID MOVE), it states: "Each message included in the set is moved, rather than copied ... ". Any idea why the spike in quota usage occurs? Thanks.

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POP3 server fails to replicate deletions
by Stephen Gildea 20 Apr '21

20 Apr '21

When I delete messages with POP3, the change doesn't get replicated. To reproduce: run the pop3 server from the command line, type this to it: DELE 1 QUIT This correctly deletes the first message on the local server, but it does not send a replication notify message. Poking around a bit with gdb, it appears that the pop3 server decides incorrectly that the changes it is making are not worth notifying about. It is hard to find something that doesn't happen, and I would appreciate suggestions for further debugging this case. I do get the expected replication when new mail arrives and also when I manipulate my mailbox with IMAP. I have tested this with Dovecot 2.3.7.2 (on Ubuntu 20.04) and with the git HEAD, 2.3.14+. What may be the same bug was reported on this list last August against Dovecot 2.3.8, but it got no reply then. My mail store is on a local ext4 file system. I have replication enabled in my configuration: $ doveconf mail_plugins mail_plugins = mail_crypt notify replication $ doveconf -f protocol=pop3 mail_plugins mail_plugins = mail_crypt notify replication

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