- dovecot - dovecot.org

Sync via ssh fails when ssl is active
by Johan 31 Jan '22

31 Jan '22

I have computers at two different locations and one computer running dovecot at each place. I sync my emails between these two servers using ssh and I haven't had any problems with this lately until I upgraded dovecot recently. I now get the following error at location "alfa" when trying to sync with dovecot at location "delta" Jan 20 16:13:09 doveadm: Error: doveconf: Fatal: Error in configuration file /etc/dovecot/conf.d/10-ssl.conf line 16: ssl_cert: Can't open file /etc/letsencrypt/live/delta.oxyl.net/fullchain.pem: Permission denied Jan 20 16:13:09 dsync-local(johan(a)oxyl.net)<FWBVNQN86WH52iQA1AGq6A>: Error: read(vmail(a)192.168.119.12) failed: EOF (version not received) Jan 20 16:13:09 dsync-local(johan(a)oxyl.net)<FWBVNQN86WH52iQA1AGq6A>: Error: Remote command returned error 89: ssh -q -p 22 -o StrictHostKeyChecking=no -i /datastorage/epost/vmail/.ssh/id_ecdsa -lvmail 192.168.119.12 doveadm dsync-server -ujohan(a)oxyl.net Trying to sync from "delta" i get the same error but the domain is changed in the error-message to 'alfa.oxyl.net' I can read mail at both locations using STARTTLS. There is no error in dovecot.log when I restart the service. If I disable ssl and comment out ssl_cert/ssl_key in 10-ssl.conf I have no trouble performing sync between servers. If I run the ssh-command in the error-message as user vmail I get the same ssl-error as above. Any ideas how to solve this? /Johan Pålsson

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Dsync replication - delayed replication (Sync lock)
by Daniel Botting 31 Jan '22

31 Jan '22

Hi, *Our setup:* Two Debian 10 machines that are setup to replicate mail between them, we have round robin DNS setup so a user can connect to either server. *What should happen:* Mail is delivered to either server and replicated across straight away to their mailbox on the other server so it does not matter which one they are connected to they will receive it fairly soon after delivery. *What actually happens:* In some instances the user will experience a delayed receipt of messages if they are not connected to the server that the message is initially delivered to, sometimes the delay is 5/10 minutes, we had a recent support ticket submitted where it was over an hour. Error message seen in mail.err: Sep 1 10:16:15 <host name> dovecot: dsync-local(<username>)<WELSGEERTl8FEAAAZJ7A9A>: Error: Couldn't lock /path/to/mailbox/.dovecot-sync.lock: fcntl(/path/to/mailbox/.dovecot-sync.lock, write-lock, F_SETLKW) locking failed: Timed out after 30 seconds (WRITE lock held by pid 3697) Process 3697 is dovecot/doveadm-server. *Doveconf -n output:* # 2.3.10.1 (a3d0e1171): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.10 (67bf5bd7) # OS: Linux 4.19.0-10-amd64 x86_64 Debian 10.5 # Hostname: <server hostname> auth_verbose = yes default_vsz_limit = 0 doveadm_password = # hidden, use -P to show it first_valid_gid = 8 first_valid_uid = 8 last_valid_gid = 8 last_valid_uid = 8 lda_mailbox_autocreate = yes lda_mailbox_autosubscribe = yes mail_gid = 8 mail_location = maildir:~/Maildir mail_plugins = " notify replication" mail_uid = 8 managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex im ap4flags copy include variables body enotify environment mailbox date index ihave duplicate mime foreverypart extracttext editheader imapfla gs 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-ldap.conf.ext driver = ldap } plugin { mail_replica = tcps:<server being replicated to>:<port being used> sieve = ~/.dovecot.sieve sieve_dir = ~/sieve sieve_extensions = +editheader +imapflags } postmaster_address = postmaster@<domain address> protocols = " imap sieve pop3" replication_max_conns = 12 service aggregator { fifo_listener replication-notify-fifo { user = mail } unix_listener replication-notify { user = mail } } service auth { unix_listener /var/run/dovecot-exim-bridge { mode = 0660 user = Debian-exim } } service doveadm { inet_listener { port = <port being used for replication> ssl = yes } } service imap-login { inet_listener imap { port = 143 } } inet_listener imaps { port = 993 ssl = yes } process_limit = 512 process_min_avail = 4 service_count = 1 } service imap { process_limit = 1024 } service managesieve-login { inet_listener sieve { port = <sieve port> } process_min_avail = 1 service_count = 8 vsz_limit = 256 M } service managesieve { process_limit = 1024 } service replicator { process_min_avail = 1 unix_listener replicator-doveadm { mode = 0666 } } ssl = required ssl_cert = </path/to/ssl/cert/fullchain.pem ssl_cipher_list = ALL:!LOW:!SSLv2:!EXP:!aNULL ssl_client_ca_dir = /etc/ssl/certs ssl_key = # hidden, use -P to show it ssl_min_protocol = TLSv1.2 userdb { args = /etc/dovecot/dovecot-ldap.conf.ext driver = ldap override_fields = home=/var/mail/%u uid=mail gid=mail } protocol lda { mail_plugins = " notify replication sieve" } protocol imap { mail_max_userip_connections = 32 mail_plugins = " notify replication" } protocol sieve { mail_max_userip_connections = 10 managesieve_logout_format = bytes=%i/%o managesieve_max_line_length = 65536 } Kind regards Daniel

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NTLM fails: dovecot: auth: Fatal: Unknown authentication mechanism 'NTLM'
by David Koski 31 Jan '22

31 Jan '22

After upgrading Debian to 11 I found Dovecot at version 2.3.13 (89f716dc2). Now auth method NTLM fails and is not even listed: # doveadm pw -l SHA1 SSHA512 SCRAM-SHA-256 BLF-CRYPT PLAIN HMAC-MD5 OTP SHA512 SHA DES-CRYPT CRYPT SSHA MD5-CRYPT PLAIN-MD4 PLAIN-MD5 SCRAM-SHA-1 SHA512-CRYPT CLEAR CLEARTEXT ARGON2I ARGON2ID SSHA256 MD5 PBKDF2 SHA256 CRAM-MD5 PLAIN-TRUNC SHA256-CRYPT SMD5 DIGEST-MD5 LDAP-MD5 /var/log/dovecot.log Jan 22 16:20:32 auth: Fatal: Unknown authentication mechanism 'NTLM' Jan 22 16:20:32 master: Error: service(auth): command startup failed, throttling for 2.000 secs Jan 22 16:20:34 auth: Fatal: Unknown authentication mechanism 'NTLM' Jan 22 16:20:34 master: Error: service(auth): command startup failed, throttling for 4.000 secs Jan 22 16:20:38 auth: Fatal: Unknown authentication mechanism 'NTLM' Jan 22 16:20:38 master: Error: service(auth): command startup failed, throttling for 8.000 secs Jan 22 16:20:46 auth: Fatal: Unknown authentication mechanism 'NTLM' Jan 22 16:20:46 master: Error: service(auth): command startup failed, throttling for 16.000 secs # doveconf -n # 2.3.13 (89f716dc2): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.13 (cdd19fe3) # OS: Linux 5.10.0-11-amd64 x86_64 Debian 11.2 # Hostname: imail.khmfdbyekekelj1rmytwnfh1bc.dx.internal.cloudapp.net auth_mechanisms = plain login ntlm debug_log_path = /var/log/dovecot-debug.log info_log_path = /var/log/dovecot-info.log log_path = /var/log/dovecot.log maildir_stat_dirs = 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 namespace compat { alias_for = hidden = yes inbox = no list = no location = prefix = INBOX. separator = . } 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.ext driver = sql } plugin { mail_plugins = " quota trash sieve" sieve = file:~/sieve;active=~/.dovecot.sieve } protocols = " imap sieve" service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0666 user = postfix } unix_listener auth-client { mode = 0660 } } 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/letsencrypt/live/imail1.sutinen.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 = /etc/dovecot/dovecot-sql.conf.ext driver = sql } protocol lmtp { mail_plugins = " quota trash sieve" postmaster_address = admin-kosmosisland.com(a)kosmosisland.com } protocol lda { mail_plugins = " quota trash sieve" } Regards, David Koski

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LMTP error on trying to find passwd-file for Postfix recipient validation
by Narcis Garcia 28 Jan '22

28 Jan '22

Hello everyone, I have following configurations (and more) at /etc/dovecot/local.conf in a "/VirtualUserFlatFilesPostfix/" setup : [partial file content begins] protocols = imap pop3 lmtp sieve mail_location = maildir:~/data:INBOX=~/data/.INBOX service lmtp { unix_listener /var/spool/postfix/private/dovecot-lmtp { user = vmail group = vmail mode = 0660 } } protocol lmtp { postmaster_address = postmaster(a)example.net mail_plugins = $mail_plugins sieve } userdb { driver = passwd-file args = username_format=%u /srv/vmail/domains.d/%d/users.d/%n/etc/passwd } passdb { driver = passwd-file args = username_format=%u /srv/vmail/domains.d/%d/users.d/%n/etc/shadow.%Ls } service auth { unix_listener /var/spool/postfix/private/auth { user = postfix group = postfix mode = 0660 } } [/partial file content ends] Everyting works (IMAP mail is stored, IMAP/POP3 mail is retrieved, incoming SMTP mail from Postfix is delivered, Outgoing SMTP senders are authenticated from Postfix~SASL) BUT: When incoming mail goes to a mailbox that does not exist, an error is logged by Dovecot, letter remains at Postfix queue, and no rejection message to sender (here host is /mail.example.net/): [partial]$ cat /var/log/mail.log 2022-01-28T08:52:00.851751+01:00 correo postfix/smtpd[1853]: CFDA63A174B: client=mail.example.com[1.2.3.4] 2022-01-28T08:52:00.872248+01:00 correo postfix/cleanup[1881]: CFDA63A174B: message-id=<83c79ee1-6e2e-4e15-307e-17cdc7e2b814(a)example.com> 2022-01-28T08:52:00.884100+01:00 correo postfix/qmgr[1529]: CFDA63A174B: from=<johndoe(a)example.com>, size=854, nrcpt=1 (queue active) 2022-01-28T08:52:00.884507+01:00 correo postfix/smtpd[1853]: disconnect from mail.example.com[1.2.3.4] ehlo=2 starttls=1 mail=1 rcpt=1 data=1 quit=1 commands=7 2022-01-28T08:52:00.969275+01:00 correo postfix/lmtp[1882]: CFDA63A174B: to=<wronguser(a)example.net>, relay=mail.example.net[private/dovecot-lmtp], delay=0.43, delays=0.35/0.02/0.02/0.05, dsn=4.3.0, status=deferred (host mail.example.net[private/dovecot-lmtp] said: 451 4.3.0 <wronguser(a)example.net> Temporary internal error (in reply to RCPT TO command)) [partial]$ cat /var/log/dovecot.log 2022-01-28 08:52:00 lmtp(1883): Info: Connect from local 2022-01-28 08:52:00 auth: Error: passwd-file(wronguser(a)example.net): stat(/srv/vmail/domains.d/example.net/users.d/wronguser/etc/passwd) failed: Address family not supported by protocol 2022-01-28 08:52:00 lmtp(wronguser(a)example.net)<1883><xbrsNqCg82FbBwAAzZSvjA>: Error: user wronguser(a)example.net: Auth USER lookup failed 2022-01-28 08:52:00 lmtp(1883): Error: Failed to lookup user wronguser(a)example.net: Internal error occurred. Refer to server log for more information. 2022-01-28 08:52:00 lmtp(1883): Info: Disconnect from local: Client has quit the connection (state=READY) Thank you for any help in debugging configuration or suggestion to enhance Postfix/Dovecot parameters. Postfix 3.4 Dovecot 2.3 -- Narcis Garcia __________ I'm using this dedicated address because personal addresses aren't masked enough at this mail public archive. Public archive administrator should fix this against automated addresses collectors.

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Non-unique Message ID in mail messages
by Daniel Ryšlink 28 Jan '22

28 Jan '22

Hello! I apologize for bringing perhaps trivial/well-known matter, but I am interested in your opinion. RFC 5322 clearly states that mail messages SHOULD contain a Message ID identifier, but if the do contain it, it MUST be globally unique. Despite this requirement, I have encountered senders (namely Spamcop) that sends obviously different (albeit related) messages called "Alert" and "Summary" (they are always related to the same incident and have the same Message ID). This creates all sorts of problems when processing these mails, namely with users that have local forwards from one domain to another (our mailserver hosts multiple domains), because for example Dovecot refuses to forward the second message, flagging it as a duplicate. My question to you is - did you also encounter similar incorrect (according to RFC standards) problem, and if so, is there a way to persuade dovecot to perhaps determine the uniqueness of a message by other means than just checking the message ID (i.e. look at other identifiers, Subject, perhaps)? Because according to the log records, Spamcop does not seem to be the only offender. Thanks in advance for any reactions, and if I did something wrong by writing this message, I apologize again in advance. If required, I can provide samples of the Spamcop messages. -- --===============-- --== Best Regards! ==-- --===============-- Daniel Ryšlink Sysadmin @ Quantcom.cz Czech Republic

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Re: dovecot Digest, Vol 225, Issue 71
by David Matthews 28 Jan '22

28 Jan '22

hi Christian >Did the password hash algorithm change between devuan 3 and 4? >You can check that in your /etc/shadow file. As I understand, devuan is pretty much debian without systemd? And that if you were prepared to do a fair bit of work you could start with debian installed, hack it about and end up with something like devuan? I doubt devuan has done anything to deviate from debian at this level and both machines were recently dist-upgraded. Dovecot needed no tinkering with at all on the debian machine. >The start of the password field should be the same something like $6$... > Yes it is on devuan 4. I no longer have anything with devuan 3 to check that, but it shouldn't have changed in a dist-upgrade? Interestingly, although it's the same user and password on both machines, I notice that the hashes in /etc/shadow are not identical after the commencing $6$. But then I don't know how these hashes are derived, so maybe that is not unexpected? -- David Matthews mail(a)dmatthews.org

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Errors: Failed to map transaction log, Corrupted transaction log, imeout (180s) while waiting for lock for transaction log
by absolutely_free＠libero.it 28 Jan '22

28 Jan '22

Hi, no, it is a single mail server, no replication at all. Thank you > Hello > > We only saw such errors with replication between two machines, when new > emails where errornously deliverd to both of them or clients connected > to both simultaniously. > > Do you have such a setup? > Kind regards, > Christian Mack

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doveadm backup : Warning: Deleting mailbox GUID= is missing locally
by Laura Smith 28 Jan '22

28 Jan '22

Hi, As per the docs (https://wiki.dovecot.org/Tools/Doveadm/Sync) I'm presently running doveadm backup multiple times with a view to eventual server migration. I am seeing messages such as this: Warning: Deleting mailbox 'Junk': UID=1826 GUID= is missing locally Is it anything to worry about ? If so, how should I be dealing with it. I also have a further question. It is not clear from the docs what the role of the "-R" flag is in relation to "doveadm backup" ? Surely by definition backup = remote -> local ? Thanks ! Laura

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Question regarding delivery from Postfix via LMTP proxy
by Vlad Sedov 28 Jan '22

28 Jan '22

Hello, I'm using Postfix with Dovecot 2.3.13, and trying to get LMTP proxy to work for authentication and delivery in the following scenario: Incoming Mail -> Postfix (server A) -> LMTP to Dovecot (server A) -> LMTP to Dovecot (server B) I'm using MySQL for authentication. I've created a user on both server A and server B, test(a)domain.tld On server A, host parameter in password_query for test(a)domain.tld is set to server B's address, and proxy_maybe is enabled. Delivery and authentication to Server A works fine. Authentication and IMAP proxy to server B works fine as well. I can connect to IMAP on server A with credentials for test(a)domain.tld and access the maildir on server B. This works surprisingly well, and is about half the battle for me.. What I can't figure out, is how can I get Postfix to deliver mail using LMTP via server A to server B.. Currently, mail still gets delivered to the user's maildir on server A. Is this possible with Dovecot alone, or do I need to use another method to get messages to hop to server B via server A? Any help would be appreciated.. cheers, Vlad

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Re: dovecot Digest, Vol 225, Issue 70
by David Matthews 27 Jan '22

27 Jan '22

hi Christian Same user and password on both machines, users with shell accounts; exactly the same; in fact I'm struggling to see anything different that might be relevant. On one machine dovecot just works on the other, it stopped working after a dist-upgrade. One machine (where it works) is a debian 11 VPS, the other is real PC hardware running devuan 4, but their dovecot is a debian package. I can't see why either of that should matter and dovecot also just worked on the PC with devuan 3. I've tried purging dovecot-core and dovecot-imapd and reinstalling to no effect. > > 1. Re: can't authenticate (Christian Mack) > > >---------------------------------------------------------------------- > >Message: 1 >Date: Thu, 27 Jan 2022 11:42:22 +0100 >From: Christian Mack >christian.mack(a)uni-konstanz.de> >To: dovecot(a)dovecot.org >Subject: Re: can't authenticate >Message-ID: >a2fbca25-75c7-4e19-a084-5e8d4d8cc645(a)uni-konstanz.de> >Content-Type: text/plain; charset="utf-8" > >Hello > >> passdb { >> driver = pam >> } > >Is user fred defined on your development machine? >Does the password match the one from the production machine? > > >Kind regards, >Christian Mack > >On 26.01.22 21:14, David Matthews wrote: >> My live mail exchanger and development machines have identical dovecot setups, yet I cannot login on the development machine:- >> >> dovecot --version >> 2.3.13 (89f716dc2) >> >>> telnet localhost 143 >> Trying 127.0.0.1... >> Connected to bulawayo. >> Escape character is '^]'. >> * OK [CAPABILITY IMAP4rev1 SASL-IR LOGIN-REFERRALS ID ENABLE IDLE LITERAL+ STARTTLS AUTH=PLAIN] Dovecot (Debian) ready. >> a login fred xxxxxxxxxxx >> a NO [UNAVAILABLE] Temporary authentication failure. [bulawayo:2022-01-26 20:02:14] >> >> same if I try openssl s_client to 993 >> >>> tail /var/log/mail.log >> Jan 26 20:03:28 bulawayo dovecot: imap-login: Disconnected (auth service reported temporary failure): user=>fred>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, secured, session=>1MRorYHWwOp/AAAB> >> >> doveconf -n >> # 2.3.13 (89f716dc2): /etc/dovecot/dovecot.conf >> # Pigeonhole version 0.5.13 (cdd19fe3) >> # OS: Linux 5.10.0-10-amd64 x86_64 Debian 11.1 >> # Hostname: bulawayo >> 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 { >> driver = pam >> } >> protocols = " imap" >> service imap-login { >> inet_listener imap { >> port = 143 >> } >> inet_listener imaps { >> port = 993 >> ssl = yes >> } >> } >> 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 { >> driver = passwd >> } >> >> -- >> David Matthews >> mail(a)dmatthews.org >> > > >-- >Christian Mack >Universit?t Konstanz >Kommunikations-, Informations-, Medienzentrum (KIM) >Abteilung IT-Dienste Forschung und Lehre >78457 Konstanz >+49 7531 88-4416 > >

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can't authenticate
by David Matthews 27 Jan '22

27 Jan '22

My live mail exchanger and development machines have identical dovecot setups, yet I cannot login on the development machine:- dovecot --version 2.3.13 (89f716dc2) >telnet localhost 143 Trying 127.0.0.1... Connected to bulawayo. Escape character is '^]'. * OK [CAPABILITY IMAP4rev1 SASL-IR LOGIN-REFERRALS ID ENABLE IDLE LITERAL+ STARTTLS AUTH=PLAIN] Dovecot (Debian) ready. a login fred xxxxxxxxxxx a NO [UNAVAILABLE] Temporary authentication failure. [bulawayo:2022-01-26 20:02:14] same if I try openssl s_client to 993 >tail /var/log/mail.log Jan 26 20:03:28 bulawayo dovecot: imap-login: Disconnected (auth service reported temporary failure): user=<fred>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, secured, session=<1MRorYHWwOp/AAAB> doveconf -n # 2.3.13 (89f716dc2): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.13 (cdd19fe3) # OS: Linux 5.10.0-10-amd64 x86_64 Debian 11.1 # Hostname: bulawayo 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 { driver = pam } protocols = " imap" service imap-login { inet_listener imap { port = 143 } inet_listener imaps { port = 993 ssl = yes } } 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 { driver = passwd } -- David Matthews mail(a)dmatthews.org

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Errors: Failed to map transaction log, Corrupted transaction log, imeout (180s) while waiting for lock for transaction log
by absolutely_free＠libero.it 27 Jan '22

27 Jan '22

Hi all, I am using dovecot-2.3.17_1 on FreeBSD system. This server offers webmail, pop3 and imap access for users. Today I am receiving several complaints from users about slowness and/or access issues. I checked on my /var/log/maillog and I see lots of: Error: Timeout (180s) while waiting for lock for transaction log file /var/domains/domain.it/username/Maildir/dovecot.list.index.log (WRITE lock held by pid 84939) Error: Corrupted transaction log file /var/domains/domain.it/otherusername/Maildir/dovecot.list.index.log seq 2: indexid changed: 1643184505 -> 1643205059 (sync_offset=0) Error: Transaction log file /var/domains/otherdomain.net/otheruser/Maildir/dovecot.list.index.log: marked corrupted Not all users seem affected. My mailbox, for example, is working fine. I checked on my disks (this is a ZFS volume) and I didn't find errors/warnings. Any suggestion? This is my dovecot configuration: # dovecot -n # 2.3.17 (e2aa53df5b): /usr/local/etc/dovecot/dovecot.conf # OS: FreeBSD 13.0-RELEASE-p6 amd64 zfs # Hostname: mailserver.domain.it auth_debug = yes auth_mechanisms = plain login auth_verbose = yes default_client_limit = 2000 default_process_limit = 500 default_vsz_limit = 512 M disable_plaintext_auth = no first_valid_gid = 125 first_valid_uid = 125 imap_id_log = * mail_gid = 1003 mail_location = maildir:/mail/domains mail_privileged_group = postfix mail_uid = 1003 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 = /usr/local/etc/dovecot/dovecot-sql-crypt.conf.ext driver = sql } service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0666 user = postfix } unix_listener auth-userdb { group = postfix mode = 0600 user = postfix } } service imap { process_limit = 1536 } service lmtp { unix_listener /var/spool/postfix/private/dovecot-lmtp { group = postfix mode = 0600 user = postfix } } ssl_cert = </etc/ssl/wildcard.domain.net_bundle.crt ssl_key = # hidden, use -P to show it userdb { args = /usr/local/etc/dovecot/dovecot-sql-crypt.conf.ext driver = sql } protocol imap { mail_max_userip_connections = 100 } Thank you very much

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sieve-filter ignores -u argument
by Андрей Куницын 27 Jan '22

27 Jan '22

Hello I try to test my sieve script, but found out that it is impossible to use a sieve-filter tool with virtual mail users. It always uses a real user name instead of passed via -u argument. # sieve-filter -v -u postmaster(a)domain.tld ~/sieve/managesieve.sieve INBOX sieve-filter(root): Fatal: Unknown user sudo -u vmail sieve-filter -u postmaster(a)domain.tld ~/sieve/managesieve.sieve INBOX sieve-filter(vmail): Fatal: Unknown user Also there is the same question on serverfault, but without an answer. https://serverfault.com/questions/1055407/how-to-make-sieve-filter-use-virt… My environment is Ubuntu 20.04 dovecot --version 2.3.7.2 (3c910f64b) -- Sincerely, Andrey Kunitsyn

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Dovecot installation problem (libssl_iostream_openssl.so is not portable!)
by Dimitri 27 Jan '22

27 Jan '22

Hi there, i try to install dovecot from source with the following configuration: > ./configure --prefix=/test/core/dovecot --with-ssldir=/test/core/dovecot/tls the configuration runs fine with the following output at the end: > Install prefix . : /test/core/dovecot > File offsets ... : 64bit > I/O polling .... : epoll > I/O notifys .... : inotify > SSL ............ : yes (OpenSSL) > GSSAPI ......... : no > passdbs ........ : static passwd passwd-file shadow checkpassword > : -pam -bsdauth -ldap -sql > userdbs ........ : static prefetch passwd passwd-file checkpassword > : -ldap -sql > CFLAGS ......... : -std=gnu99 -g -O2 -fstack-protector-strong -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/test/dep/openssl/include > SYSTEMD ........ : notify - /lib/systemd/system/dovecot.service > SQL drivers .... : > : -pgsql -mysql -sqlite -cassandra > Full text search : squat > : -lucene -solr But when i start to build (make) after a while i get the following error: > *** Warning: Linking the executable test-iostream-ssl against the loadable module > *** libssl_iostream_openssl.so is not portable! > libtool: link: gcc -std=gnu99 -g -O2 -fstack-protector-strong -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/test/dep/openssl/include -o .libs/test-iostream-ssl test-iostream-ssl.o ./.libs/libssl_iostream_openssl.so ./.libs/libssl_iostream.a ../lib-test/.libs/libtest.a ../lib/.libs/liblib.a -L/test/dep/openssl/lib64 -lssl -lcrypto -ldl -Wl,-rpath -Wl,/test/core/dovecot/lib/dovecot > /usr/bin/ld: ./.libs/libssl_iostream_openssl.so: undefined reference to `ERR_free_strings' > /usr/bin/ld: ./.libs/libssl_iostream_openssl.so: undefined reference to `ENGINE_cleanup' > /usr/bin/ld: ./.libs/libssl_iostream_openssl.so: undefined reference to `SSL_library_init' > /usr/bin/ld: ./.libs/libssl_iostream_openssl.so: undefined reference to `OBJ_cleanup' > /usr/bin/ld: ./.libs/libssl_iostream_openssl.so: undefined reference to `CRYPTO_cleanup_all_ex_data' > /usr/bin/ld: ./.libs/libssl_iostream_openssl.so: undefined reference to `OpenSSL_add_all_algorithms' > /usr/bin/ld: ./.libs/libssl_iostream_openssl.so: undefined reference to `SSL_CTX_set_tmp_rsa_callback' > /usr/bin/ld: ./.libs/libssl_iostream_openssl.so: undefined reference to `EVP_cleanup' > /usr/bin/ld: ./.libs/libssl_iostream_openssl.so: undefined reference to `SSL_load_error_strings' > /usr/bin/ld: ./.libs/libssl_iostream_openssl.so: undefined reference to `SSL_CTX_need_tmp_RSA' > collect2: error: ld returned 1 exit status > make[3]: *** [Makefile:655: test-iostream-ssl] Error 1 > make[3]: Leaving directory '/test/tmp/dovecot-2.3.17.1/src/lib-ssl-iostream' > make[2]: *** [Makefile:573: all-recursive] Error 1 > make[2]: Leaving directory '/test/tmp/dovecot-2.3.17.1/src' > make[1]: *** [Makefile:702: all-recursive] Error 1 > make[1]: Leaving directory '/test/tmp/dovecot-2.3.17.1' > make: *** [Makefile:546: all] Error 2 I've searched for the error and find some posts about set explicitly CPPFLAGS and LDFLAGS and something about missing shared libraries of openssl. My openssl have shared libraries (libcrypto.so libssl.so ...) and the explicit use of CPPFLAGS and LDFLAGS to my openssl hasn't changed anything I use Openssl 3.0 but i've tested also 1.1.1m and 1.1.1g for example, same error! Dovecot is the latest 2.3.17.1 Can anyone help me with this please? Thanks!

1 0

doveadm stateful backup
by Christian 26 Jan '22

26 Jan '22

Hi all, first: I'm using version 2.3.4.1 I manage some rather large imap mailboxes which I want to backup on a regular basis. Some of them have relatively heavy traffic and one of them is greater than 30GB in size. I studied the docs for doveadm backup (https://wiki2.dovecot.org/Tools/Doveadm/Sync) and even did some code research to better understand the process. The docs state that using stateful synchronization is the most efficient way to synchronize mailboxes, therefore I chose this approach. Highlevel overview: - store a copy of the whole maildir in a separate directory (/var/vmail/backup) - backup to this directory once a minute (trying to make most use of transaction logs) using the last state stored within a file - create a backup once a day using tar (full, differential and incremental ones) blocking the backup process of the before mentioned step I quite often receive notifications that doveadm backup returned an exit code of 2, which should be quite normal. These notifications look like that: dsync(another_address(a)my.domain): Warning: Failed to do incremental sync for mailbox INBOX, retry with a full sync (Modseq 171631 no longer in transaction log (highest=177818, last_common_uid=177308, nextuid=177309)) dsync(another_address(a)my.domain): Warning: Mailbox changes caused a desync. You may want to run dsync again: Remote lost mailbox GUID e9149d0ae4e02d532505000026ca4352 (maybe it was just deleted?) Synced another_address(a)my.domain successfully but missing some changes. Took 3 seconds. Starting retry 1... The first message seems to point out that the transaction log got rolled and no more contains the messages from the backup dir, right? I thought about setting mail_index_log_rotate_min_age to 1hour to prevent rolling transaction logs too often, but abandoned this thought and increased the backup interval to once a minute. The warnings still appear so maybe my thoughts about transactions logs are wrong. The second message seems less alarming to me. How does doeveadm backup behave in such situations? Does it directly fall back to a less efficient way of syncing mails? Does the state store the information "retry with a full sync" and the next run uses this mode? To investigate on this I simply measured runtimes an saw that the second/retry run takes a bit longer (up to about 15 seconds) to sync the dir. I'm afraid of losing messages using my approach. Is it safe to always use doveadm backup -s $state? Simply counting one maildirs files within the live directory and the backup copy shows a 100 fewer files within the backup dir although the script runs only since a few days. For reference, see my backup script below. Regards Christian #!/bin/bash # * * * * * /root/bin/backup.sh --sync-only # 12 2 1-7 * * test $(date +\%u) -eq 6 && /root/bin/backup.sh --full # 12 2 8-31 * * test $(date +\%u) -eq 6 && /root/bin/backup.sh --differential # 12 2 * * * test $(date +\%u) -ne 6 && /root/bin/backup.sh synconly=0 differential=0 fullbackup=0 if [ $# -gt 0 ] ; then if [ "$1" == "--sync-only" ] ; then synconly=1 elif [ "$1" == "--differential" ] ; then differential=1 elif [ "$1" == "--full" ] ; then fullbackup=1 fi fi basedir="/var/vmail/backup" targetdir="/var/vmail/backup/done" mailaddresses="one_address(a)my.domain another_address(a)my.domain yet_another(a)my.domain" if [ ! -d "$basedir" ] ; then mkdir -p "$basedir" chown vmail:vmail "$basedir" fi if [ ! -d "$targetdir" ] ; then mkdir -p "$targetdir" chown vmail:vmail "$targetdir" fi for mailaddr in ${mailaddresses} ; do #echo "Creating backup for $mailaddr." domainpart=${mailaddr#*@} localpart=${mailaddr%%@*} lockfile="$basedir/$mailaddr.lock" statefile="$basedir/$mailaddr.state" backupdir="$domainpart/$localpart/Maildir" snapshotfile_full="$basedir/$mailaddr.full.snar" snapshotfile="$basedir/$mailaddr.snar" backup_basename="$basedir/${mailaddr}_$(date '+%Y%m%d_%H%M%S')" ( if [ $synconly -eq 1 ] ; then flock -xn 200 if [ $? -eq 1 ] ; then # failed to acquire lock. Skip mailbox silently. exit fi fi # try to acquire exclusive lock for one minute flock -xw 60 200 if [ $? -eq 1 ] ; then echo "Failed to acquire write lock within 60 seconds. Skipping $mailaddr." exit fi retries=0 retval=1 until [ $retval -eq 0 ] || [ $retries -ge 3 ] ; do let 'retries++' if [ -f "$statefile" ] ; then oldstate=$(head -1 "$statefile") else oldstate="" fi start_time=$(date +%s) ERROR=$((doveadm backup -u "$mailaddr" -s "$oldstate" "maildir:$basedir/$backupdir") 2>&1 > "$statefile") retval=$? end_time=$(date +%s) let 'duration=end_time-start_time' if [ $retval -eq 2 ] ; then #if [ $retries -gt 1 ] ; then echo "$ERROR" echo "Synced $mailaddr successfully but missing some changes. Took $duration seconds. Starting retry $retries..." #fi elif [ $retval -ne 0 ] ; then echo "$ERROR" echo "Syncing $mailaddr failed. Return code $retval. Took $duration seconds. Removing backup directory and starting retry $retries..." rm -rf "$basedir/$backupdir" rm -f "$statefile" "$snapshotfile" elif [ $retries -gt 1 ] ; then echo "Successful sync took $duration seconds." fi done # downgrade lock to shared lock flock -sn 200 [ $synconly -eq 1 ] && exit if [ $retval -ne 0 ] ; then echo "Too many retries. Aborting backup of $mailaddr." exit fi cd "$basedir" if [ $fullbackup -eq 1 ] || [ ! -f "$snapshotfile_full" ] ; then tar -cpzf "${backup_basename}_full.tar.gz" --level=0 -g "$snapshotfile_full" "$backupdir" cp -f "$snapshotfile_full" "$snapshotfile" else suffix="" if [ $differential -eq 1 ] ; then cp -f "$snapshotfile_full" "$snapshotfile" suffix="_diff" fi tar -cpzf "${backup_basename}${suffix}.tar.gz" -g "$snapshotfile" "$backupdir" fi cd - > /dev/null mv "${basedir}/"*.tar.gz "$targetdir" ) 200>"$lockfile" [ $synconly -eq 1 ] && continue # housekeeping newest_full=$(ls -1 "${targetdir}/${mailaddr}_"*_full.tar.gz 2>/dev/null | sort | tail -1) if [ -n "$newest_full" ] ; then #echo "Cleaning up files older than $newest_full..." find "$targetdir" -depth -maxdepth 1 -name "${mailaddr}_*" ! -newer "$newest_full" ! -samefile "$newest_full" -printf 'Deleting %p...\n' -delete fi done

1 1

pop3-login logging double Disconencted
by Noel Butler 26 Jan '22

26 Jan '22

Hi all, Wondering if anyone else is seeing this double Disconnected in the logs with current stable version, it only happens for pop3-login, and only with Too many commands... other pop3-login logging with Disconnected like Connection closed (no auth attempts... etc are fine Example of anomaly - pop3-login: Info: Disconnected: Disconnected: Too many bad commands (no auth attempts in ... If anyone running 2.3.17.1 sees this or does not see it on Too many bad... or at all, kindly mind letting me know, not sure if something has gone haywire here or its a bug that needs reporting since logs indicate this only occurred after updating to the point 1 release. -- Regards, Noel Butler This Email, including attachments, may contain legally privileged information, therefore at all times remains confidential and subject to copyright protected under international law. You may not disseminate this message without the authors express written authority to do so. If you are not the intended recipient, please notify the sender then delete all copies of this message including attachments immediately. Confidentiality, copyright, and legal privilege are not waived or lost by reason of the mistaken delivery of this message.

2 1

noob maildir question
by mikfum 25 Jan '22

25 Jan '22

I would like to ask if it is an acceptable practice to manage messages in the maildir as a file (move them from one folder to another) while dovecot is in stop state thinking that it will be rebuild to the next imap user login thanks for your patience:) mik

5 10

Re: noob maildir question
by mikfum 24 Jan '22

24 Jan '22

thanks ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐ Il lunedì 24 gennaio 2022 5:15 AM, Ted Hatfield <ted(a)io-tx.com> ha scritto: > I do this all the time on my server. From one user mailbox to another or > > from one maildir folder to another. On my platform I need to make certain > > owner/group of the moved messages is correct for the user I've moved them > > to. Other than that dovecot appears to re-index on the fly. > > Be aware that this is observed information. Others more knowledgeable may > > have concerns that I'm not aware of or just can't see on my system. > > Ted > > On Mon, 24 Jan 2022, mikfum wrote: > > > I would like to ask if it is an acceptable practice to manage messages in the maildir as a file (move them from > > > > one folder to another) while dovecot is in stop state thinking that it will be rebuild to the next imap user login > > > > thanks for your patience:) > > > > mik

1 0

zlib.read errors after upgrade from 2.3.15 to 2.3.17.1
by Arno Schneider 24 Jan '22

24 Jan '22

After upgrading my mailserver from buster to bullseye and dovecot 2.3.15 to 2.3.17.1 I got the following errors: Jan 22 14:22:32 Warning: doveadm(user1)<2953060><49b0NRQF7GFkDy0ALVPUUA>: mdbox /local/mail/user1/storage: rebuilding indexes Jan 22 14:22:39 Error: doveadm(user2)<2953112><awsPGB8F7GGYDy0ALVPUUA>: dsync(2nd.dovecot.server): read(compress(/local/mail/user2/storage/m.4650)) failed: read(/local/mail/user2/storage/m.4650) failed: zlib.read(/local/mail/user2/storage/m.4650): unexpected EOF at 7038367 (last sent=mail, last recv=mail_request (EOL)) I have 2 dovecot servers in a multi-master configuration. The both servers are synced with dsync and the users are routed through a dovecot directors. Any hints where I can continue to investigate / solve this issue? best regards, arno

1 0

Why would dovecot not be answering
by Ruben Safir 23 Jan '22

23 Jan '22

I am really lost as to why dovecot is not authenticating I have smtpd_sasl_type = dovecot in main.cf and # Postfix smtp-auth unix_listener /var/spool/postfix/private/auth { mode = 0666 user = postfix group = postfix } in /etc/dovecot/conf.d/10-master.conf I want it to authenticate on submition only Everything I read says this should do it, but I am up against a wall. I have no debugging information or log at all to confirm what postfix is doing. -- So many immigrant groups have swept through our town that Brooklyn, like Atlantis, reaches mythological proportions in the mind of the world - RI Safir 1998 http://www.mrbrklyn.com DRM is THEFT - We are the STAKEHOLDERS - RI Safir 2002 http://www.nylxs.com - Leadership Development in Free Software http://www2.mrbrklyn.com/resources - Unpublished Archive http://www.coinhangout.com - coins! http://www.brooklyn-living.com Being so tracked is for FARM ANIMALS and extermination camps, but incompatible with living as a free human being. -RI Safir 2013

3 5

S3 integration w Dovecot
by Martin Olsen 21 Jan '22

21 Jan '22

Good morning, day, evening :P As stated on documentation S3-compatible Storages — Dovecot documentation <https://doc.dovecot.org/configuration_manual/mail_location/obox/s3/> only AWS S3 is officially supported. However, we know that Scality has been successfully integrated at some larger corporations. Particularly curious if anyone has integrated with Pure S3 object storage solution, or any other for that matter? Just looking at some different options. - Sincerely, Martin.

4 3

Stop used or not
by mauric＠gmx.ch 21 Jan '22

21 Jan '22

Sieve scripts running fine, but please what would mean the "Stop", if I have multiple Policy that will run true, I need one stop to finish this per section? if header :is ["from","bcc","to"] ["Email-Address-one", "Email-Address-Two", "and so on"] { fileinto ".\Magic-FolderName"; stop; } thanks

3 4

Upgrade only piegenhole to 0.5.17?
by mauric＠gmx.ch 20 Jan '22

20 Jan '22

Please it's possible to update only piegenhole to 0.5.17, on existing Dovecot installation? Downloading dovecot-2.3-pigeonhole-0.5.17.1 Here I found the update-version, its this the possible way? And why I don't found any Informations on any readme, please point me to the right place. installed version, I think this it's the right view? Please on witch place I can check the Sieve installed module? doveconf | head # 2.3.4.1 (f79e8e7e4): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5 () Also found in file pieg-config /* Define to the version of Pigeonhole for Dovecot. */ #define PIGEONHOLE_VERSION "0.5.4" On Debian 10 I have this installed. dovecot-managesieved 1:2.3.4.1-5+deb10u6 amd64 secure POP3/IMAP server - ManageSie dovecot-sieve 1:2.3.4.1-5+deb10u6 amd64 secure POP3/IMAP server - Sieve filters support also checking the folder /usr/include/dovecot/sieve with intention so found any possible version? Thanks for any update

2 2

sockets created for lmtp
by Mike 20 Jan '22

20 Jan '22

Was recently configuring lmtp to listen in the postfix spool for mail. I set the socket as suggested in the documentation, however, when I look at what sockets were created there was an additional one for dovecot. Since I made the change, my expectation would have been just the one that I set up. I doubt it impacts it negatively, but I wanted to understand if I configured things correctly or not. Thanks. Mike

4 6

FTS Tokenization filters normalizer-icu vs lowercase
by Alessio Cecchi 20 Jan '22

20 Jan '22

Hi, I'm trying to setup fts-flatcurve with tokenization. What are the differences/benefits with "fts_filters = normalizer-icu" vs "fts_filters = lowercase"? Reading the Doc I found about normalizer-icu "This is potentially very resource intensive." and about lowercase "Supports UTF8, when compiled with libicu". So, using lowercase is almost the same that normalizer-icu but faster? FYI for using fts-flatcurve with dovecot RPM packages from repo.dovecot.org you have to rebuild with --with-icu --with-stemmer --with-textcat and related library. Thanks -- Alessio Cecchi Postmaster @ http://www.qboxmail.it https://www.linkedin.com/in/alessice

2 1