- dovecot - dovecot.org

Upgrading from 2.3.18 --> 2.3.19
by Paul Kudla (SCOM.CA Internet Services Inc.) 18 May '22

18 May '22

Ok currently running 2.3.18 Would like to upgrade to 2.3.19 (to keep current) Since these are production servers can i down grade back to 2.3.18 if nessesary? Issues at hand is there seems to be conflicting messages about the replication being fixed or not ? so would like to basically try 2.3.19 to see if it fixes some of my issues (large folder counts etc failing to replicate properly) If it does or stays the same then i am ok with that for now. if 2.3.19 causes issues can i go back to 2.3.18 as i already have scripts etc sorting out the sync issues? pls advise -- Happy Wednesday !!! Thanks - paul Paul Kudla Scom.ca Internet Services <http://www.scom.ca> 004-1009 Byron Street South Whitby, Ontario - Canada L1N 4S3 Toronto 416.642.7266 Main 1.866.411.7266 Fax 1.888.892.7266

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Re: Can sync/migrate all mail from remote imap account except the main "INBOX"
by Darren Mobley 18 May '22

18 May '22

Your example pointed me to a solution, excellent ! In my case I only needed one pass, I had to supply both imapc_list_prefix AND imapc_prefix AND the "namespace/inbox/prefix=" options. In case anyone runs into this in the future, here's a decent place to start for debugging: /usr/bin/doveadm -Dv -o imapc_list_prefix=INBOX -o imapc_prefix=INBOX. -o "namespace/inbox/prefix=" -o mail_fsync=never -o dsync_commit_msgs_interval=100 -o imapc_features=rfc822.size,fetch-headers -o dsync_features=empty-header-workaround -o imapc_port=143 -o imapc_host=127.0.0.1 -o imapc_password=yayforpasswords -o imapc_user=mailto:wah@hellodemo.ppl -o imapc_rawlog_dir=/tmp/raww -o mail_prefetch_count=20 sync -1Ru mailto:saywhatnow@letest.tld imapc: Thanks again for digging through the old emails where the magic incantations were, I really appreciate it! Darren ---- On Wed, 18 May 2022 05:19:53 -0500 Sami Ketola <sami(a)ketola.io> wrote ---- So adding "-o imapc_list_prefix=INBOX" to the doveadm command line should fix that, I would think ? So is the remote INBOX really 'INBOX' or 'INBOX.INBOX'? Command line arguments depend on which one it is. I managed to find some old archived emails with some tips on how it was solved back then. It was done with something like this: normal doveadm command: 'LOG_STDERR_TIMESTAMP="%b %d %H:%M:%S.%{usecs} " ' + '/usr/bin/doveadm' + dsync_debug + \ " -o mail_prefetch_count=10 " + \ " -o imapc_features=fetch-headers " + \ " -o imapc_host=" + legacy_host + \ " -o imapc_port=" + legacy_port + \ " -o imapc_list_prefix=" + imapc_prefix + \ " -o imapc_prefix=" + imapc_prefix + \ " -o imapc_user=" + self.legacy_user + \ " -o imapc_master_user=" + self.legacy_user + \ " -o imapc_password=" + imapc_master_password + \ " -o mail_fsync=never " + \ " backup -u " + self.uid + \ " -R imapc: >> " + dsync_err_log_location + self.uid + ".dsync_err.log 2>&1" If I remember correctly imapc_prefix was 'INBOX/' since this customer had INBOX/INBOX setup with / as separator. and if user had INBOX/INBOX detected this command was run on top of that to migrate INBOX: 'LOG_STDERR_TIMESTAMP="%b %d %H:%M:%S.%{usecs} " ' + '/usr/bin/doveadm' + dsync_debug + \ " -o namespace/inbox/prefix= " + \ " -o mail_prefetch_count=10 " + \ " -o imapc_features=fetch-headers " + \ " -o imapc_host=" + legacy_host + \ " -o imapc_port=" + legacy_port + \ " -o imapc_user=" + self.legacy_user + \ " -o imapc_master_user=" + self.legacy_user + \ " -o imapc_password=" + imapc_master_password + \ " -o mail_fsync=never " + \ " backup -u " + self.uid + \ " -m INBOX/INBOX " + \ " -R imapc: >> " + dsync_err_log_location + self.uid + ".dsync_err.log 2>&1" HTH, Sami

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Re: dovecot Digest, Vol 229, Issue 23
by Thom Pol 18 May '22

18 May '22

I must say I was a bit sceptical if this sieve script would resolve it, but it seems like it totally did! Thanks a lot for your reply, hope this helps someone else in the future as well. Kind regards, Thom Pol On 16/05/2022 08:12, Paul Kudla (SCOM.CA Internet Services Inc.) wrote: > ok duplicsate emails (even across dsync, replication etc) is typically > handled via a global sieve script > > > I use : > > # cat duplicates.sieve > require "duplicate"; # for dovecot >= 2.2.18 > > if duplicate { > discard; > stop; > } > > for the scripts > > and setup sieve to work via my dovecot.conf file > > relative parts below : > > -------------------------------------------------------------------- > > protocols = imap pop3 lmtp sieve > > protocol lmtp { > mail_plugins = $mail_plugins sieve > postmaster_address =monitor(a)scom.ca > } > > > protocol lda { > mail_plugins = $mail_plugins sieve > } > > > plugin { > ..... > > sieve =file:~/sieve;active=~/sieve/.dovecot.sieve > > sieve_duplicate_default_period = 1h > sieve_duplicate_max_period = 1d > sieve_extensions = +duplicate +notify +imapflags +vacation-seconds > sieve_global_dir = /usr/local/etc/dovecot/sieve > sieve_before = /usr/local/etc/dovecot/sieve/duplicates.sieve > > ..... > } > > service managesieve-login { > process_limit = 1000 > vsz_limit = 1g > inet_listener sieve { > port = 4190 > } > } > > protocol sieve { > managesieve_implementation_string = Dovecot Pigeonhole > managesieve_max_line_length = 65536 > } > > > > ------------------------------------------------------------------ > > > note the sieve_before which handles duplictes during delivery etc. > > > Happy Monday !!! > Thanks - paul > > Paul Kudla > > > Scom.ca Internet Services<http://www.scom.ca> > 004-1009 Byron Street South > Whitby, Ontario - Canada > L1N 4S3 > > Toronto 416.642.7266 > Main?1.866.411.7266 > Fax?1.888.892.7266

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dovecot virtual users with sendmail, my solution
by Christopher McCrory 18 May '22

18 May '22

Hello... I wanted to use dovecot virtual users with sendmail. As you probably know, this doesn't work by default. The more scalable solution is probably to use LDAP, but I really don't like it. This is how I did it https://github.com/chrismcc-gmail/dovecot-virtual-sendmail Basically I abused glibc's db feature in /etc/nsswitch in /var/db/Makefile something like this: $(VAR_DB)/passwd.db: /etc/dovecot/usersfile @printf %s "$(patsubst %.db,%,$(@F))... " @$(AWK) 'BEGIN { FS=":"; OFS=":" } \ /^[ \t]*$$/ { next } \ /^[ \t]*#/ { next } \ /^root/ { next } \ /^[^#]/ { printf ".%s ", $$1; \ printf "%s:x:65534:65534:%s:/home/vmail/%s:/sbin/nologin\n", $$1, $$1, $$1; \ }' $^ | \ $(MAKEDB) -o $@ - @echo "done." make -C /var/db getent passwd ; shows ... virtualuser:x:65534:65534:virtualuser:/home/vmail/virtualuser:/sbin/nologin othervuser:x:65534:65534:othervuser:/home/vmail/othervuser:/sbin/nologin A longer explanation and more info is in the github repository It takes about 10 minutes to go from new clean server to working email server with this I've been running this in production for about a week now without any problems. Question: Has anyone else done this? I don't see any downsides, but I might be missing something. -- Christopher McCrory To the optimist, the glass is half full. To the pessimist, the glass is half empty. To the engineer, the glass is twice as big as it needs to be.

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Preventing deletion of mails in some directories?
by Philip Rhoades 18 May '22

18 May '22

People, I can't get the system "chattr" to do what I want so I am wondering if there is some way to prevent deletion of mails in the INBOX and the Sent folders? Renaming and moving files needs to be possible for Maildir functions and also for me - so I only need deletion prevention . . Is this possible from Dovecot? Thanks, Phil. -- Philip Rhoades PO Box 896 Cowra NSW 2794 Australia E-mail: phil(a)pricom.com.au

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Can sync/migrate all mail from remote imap account except the main "INBOX"
by Darren Mobley 18 May '22

18 May '22

Greetings! I've been trying to sync my email to a server, however it only syncs the mail in folders other than INBOX. For testing purposes, I've created a fake domain, "letest.tld" and a new empty user account "mailto:saywhatnow@letest.tld" to receive the copy of the mail being migrated. What I've been trying are iterations of: /usr/bin/doveadm -D -o mail_fsync=never -o dsync_features=empty-header-workaround -o imapc_ssl=imaps -o imapc_features=rfc822.size,fetch-headers -o dsync_commit_msgs_interval=100 -o imapc_port=993 -o imapc_host=imap.zoho.com -o imapc_password=NoNoTRe4LLyMyP4$$ -o imapc_user=mailto:decker@n3t.net -o mail_prefetch_count=20 sync -1Ru mailto:saywhatnow@letest.tld imapc: Regardless of running sync -1 or backup (I want to keep original mailbox as-is for now) I get errors related to INBOX. With sync -1 ; May 10 16:53:29 dsync(mailto:saywhatnow@letest.tld): Debug: brain S: Ignore nonexistent mailbox GUID c92f64f79f0d1ed01e6d5b314f04886c with -1 sync May 10 16:53:29 dsync(mailto:saywhatnow@letest.tld): Debug: brain S: We don't have mailbox c92f64f79f0d1ed01e6d5b314f04886c May 10 16:53:29 dsync(mailto:saywhatnow@letest.tld): Debug: brain M: Ignoring missing remote box GUID c92f64f79f0d1ed01e6d5b314f04886c May 10 16:53:29 dsync(mailto:saywhatnow@letest.tld): Debug: Mailbox INBOX.Archive: Mailbox opened May 10 16:53:29 dsync(mailto:saywhatnow@letest.tld): Debug: Mailbox INBOX.Archive: Mailbox opened May 10 16:53:29 dsync(mailto:saywhatnow@letest.tld): Debug: brain S: Skipping unchanged mailbox 51a58e1d1d5c491aac71488647b20224 May 10 16:53:29 dsync(mailto:saywhatnow@letest.tld): Debug: Mailbox INBOX.Commercial Spam: Mailbox opened May 10 16:53:29 dsync(mailto:saywhatnow@letest.tld): Debug: Mailbox INBOX.Commercial Spam: Mailbox opened With backup : May 10 16:54:55 doveadm(mailto:saywhatnow@letest.tld): Debug: brain M: Namespace INBOX. has location maildir:/home/letest/mail/letest.tld/saywhatnow:UTF-8 May 10 16:54:55 doveadm(mailto:saywhatnow@letest.tld): Debug: Mailbox INBOX: Mailbox opened May 10 16:54:55 doveadm(mailto:saywhatnow@letest.tld): Debug: Mailbox INBOX: Mailbox opened May 10 16:54:55 doveadm(mailto:saywhatnow@letest.tld): Debug: Namespace INBOX.: Using permissions from /home/letest/mail/letest.tld/saywhatnow: mode=0700 gid=default ... May 10 16:54:55 dsync(mailto:saywhatnow@letest.tld): Debug: brain S: Namespace INBOX. has location imapc: May 10 16:54:57 dsync(mailto:saywhatnow@letest.tld): Debug: brain M: Local mailbox tree: INBOX guid=c92f64f79f0d1ed01e6d5b314f04886c uid_validity=1 uid_next=1 subs=yes last_change=0 last_subs=1652217475 May 10 16:54:57 dsync(mailto:saywhatnow@letest.tld): Debug: brain S: Local mailbox tree: INBOX guid=c92f64f79f0d1ed01e6d5b314f04886c uid_validity=1 uid_next=8230 subs=yes last_change=0 last_subs=0 ... May 10 16:54:57 dsync(mailto:saywhatnow@letest.tld): Debug: brain M: Remote mailbox tree: INBOX guid=c92f64f79f0d1ed01e6d5b314f04886c uid_validity=1 uid_next=8230 subs=yes last_change=0 last_subs=0 ... May 10 16:54:57 dsync(mailto:saywhatnow@letest.tld): Debug: brain M: Mailbox INBOX: local=c92f64f79f0d1ed01e6d5b314f04886c/0/1, remote=c92f64f79f0d1ed01e6d5b314f04886c/0/1: Mailboxes are equal ... May 10 16:54:57 dsync(mailto:saywhatnow@letest.tld): Debug: Mailbox INBOX: Mailbox opened May 10 16:54:57 dsync(mailto:saywhatnow@letest.tld): Debug: brain S: Mailbox INBOX: local=c92f64f79f0d1ed01e6d5b314f04886c/0/1, remote=c92f64f79f0d1ed01e6d5b314f04886c/0/1: Mailboxes are equal ... May 10 16:54:57 dsync(mailto:saywhatnow@letest.tld): Debug: Mailbox INBOX: Mailbox opened May 10 16:54:57 dsync(mailto:saywhatnow@letest.tld): Debug: brain S: Change during sync: Mailbox GUID c92f64f79f0d1ed01e6d5b314f04886c was lost May 10 16:54:57 dsync(mailto:saywhatnow@letest.tld): Debug: brain S: We don't have mailbox c92f64f79f0d1ed01e6d5b314f04886c May 10 16:54:57 dsync(mailto:saywhatnow@letest.tld): Debug: brain M: Change during sync: Remote lost mailbox GUID c92f64f79f0d1ed01e6d5b314f04886c (maybe it was just deleted?) ... May 10 16:55:33 dsync(mailto:saywhatnow@letest.tld): Warning: Mailbox changes caused a desync. You may want to run dsync again: Remote lost mailbox GUID c92f64f79f0d1ed01e6d5b314f04886c (maybe it was just deleted?) This is odd, since that very GUID is in the uidlist file for the base folder: # grep -R Gc92f64f79f0d1ed01e6d5b314f04886c /home/letest/mail/letest.tld/saywhatnow /home/letest/mail/letest.tld/saywhatnow/dovecot-uidlist:3 V1 N1 Gc92f64f79f0d1ed01e6d5b314f04886c I've tried all sorts of things to get this to work, including removing the entire /home/letest/mail/letest.tld/saywhatnow/ directory so there could be no conflicts with existing mailbox, set mailbox_list_index=no , set lda_mailbox_autocreate=no , etc. The errors appear to originate from src/doveadm/dsync/dsync-brain-mailbox.c but it's not really telling me a lot. I'm using dovecot version 2.3.18 (9dd8408c18) on a cPanel server. `dovecot -n` output attached. Any help would be greatly appreciated! Thanks, Darren

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Dovecot and RFC6856
by Tan Mientras 17 May '22

17 May '22

Hi. Just after upgrading *courier* from an old version, we are receiving warning messages instead of mails stating: "This E-mail message was determined to be Unicode-formatted but your E-mail reader does not support Unicode E-mail." warnings. It looks much like: *https://bugzilla.mozilla.org/show_bug.cgi?id=1571672 <https://bugzilla.mozilla.org/show_bug.cgi?id=1571672>* https://talk.plesk.com/threads/messages-with-unicode-unable-to-pick-up-via-… it seems, malformed mails (they showed errors before migration, but they were shown at least!) are handled incorrectly by thunderbird and the only option is to *revert backwards or migrate to dovecot*. *Does dovecot also implement RFC8656*? Will the same happen if we migrate to dovecot? Any plans for future adoption of that RFC?

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Shared mailboxes, users with dots and a bug in subscriptions
by Tobias Stein 17 May '22

17 May '22

Hi, i'm running Dovecot 2.3.14.alpha0 with shared namespaces and stumbled across some errors messages logged, when the list of subscribed mailboxes is queried by a client. For every distinct account of in the list of subscriptions two corresponding lines are logged: Jan 28 11:42:34 mx1 dovecot: auth: missing passwd file: /etc/dovecot/private/example/users Jan 28 11:42:34 mx1 dovecot: auth: missing passwd file: /etc/dovecot/private/example/users Jan 28 11:42:34 mx1 dovecot: auth: missing passwd file: /etc/dovecot/private/example/users Jan 28 11:42:36 mx1 dovecot: imap(example_user(a)example.com)<3638><xl6li/O5VsVfWxyn>: Error: mkdir(/var/run/dovecot/user-not-found/noc@example) failed: Permission denied (euid=109(vmail) egid=118(vmail) missing +w perm: /var/run/dovecot, dir owned by 0:0 mode=0755) Jan 28 11:42:36 mx1 dovecot: imap(example_user(a)example.com)<3638><xl6li/O5VsVfWxyn>: Error: mkdir(/var/run/dovecot/user-not-found/info@example) failed: Permission denied (euid=109(vmail) egid=118(vmail) missing +w perm: /var/run/dovecot, dir owned by 0:0 mode=0755) Jan 28 11:42:36 mx1 dovecot: imap(example_user(a)example.com)<3638><xl6li/O5VsVfWxyn>: Error: mkdir(/var/run/dovecot/user-not-found/root@example) failed: Permission denied (euid=109(vmail) egid=118(vmail) missing +w perm: /var/run/dovecot, dir owned by 0:0 mode=0755) Similar messages are logged, when invalid entries are listed in '/var/lib/dovecot/db/shared-mailboxes', which i already pruned and haven't received them anymore since. I think these errors are caused by an unintended behaviour when writing "~/Maildir/subscriptions", which looks (shortened) like this. V 2 INBOX/INBOX shared/noc@example com/INBOX shared/info@example com/INBOX shared/root@example com/test shared/root@example com/test test_sub The subscription-file.c explodes the name on every hierarchy separator ('.','\0') and inserts a TAB character. Unfortunately it also explodes on the DNS label delimiter „.‟. This should probably be fixed by passing a structure containing the required information to the formatter to distinguish mailboxes from domain-names. Subscription in combination with multiple domains and shared mailboxes seems broken to me. Actually i can't even explain to me, why it is working in face of the errors. :-) Unfortunately in Maildir++ the separator dot is hard-coded. There is a very old thread on this mailing list, that suggests using „auth_username_translation‟ to replace dots with a different character, but this idea is getting worse the longer i think about it. I absolutely dislike the idea to set LAYOUT=fs, namespace/separator = § to change the separators to split on, because this would mean to restructure the physical layout of all mailboxes (hierarchically) and mess around with lots of files. I attached a dovecot-sysreport to reproduce the behaviour. /etc/dovecot/private/example.com/users looks like this: ### user:password:uid:gid:(gecos):home:(shell):extra_fields noc:{SSHA512}_hash_:::::: info:{SSHA512}_hash_:::::: root:{SSHA512}_hash_:::::: Please correct me if i'm wrong or point me to a workaround, but i think the layout code needs some love. :-) Best regards Tobias

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Re: Permissions and ownership on /dev/shm/dovecot
by doug 16 May '22

16 May '22

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Fatal Error after upgrade to 2:2.3.19-2+debian11
by Sebastian Kroczek 16 May '22

16 May '22

Hello all, I updated the server tonight and with it Dovecot from 2.2.27 to 2:2.3.19-2+debian11. However, there seems to be a problem with the ACLs, because since then fatal errors are logged (see core dump). I suspect that some outdated configuration is causing this behavior, but so far I couldn't figure out which one it could be. I also have no clue right now how to debug this further. Thank you very much for your help. If more information are needed, I will of course be happy to provide them. VG Sebastian ======== Error logs ========= May 16 13:33:43 Fatal: imap(user1(a)domain.com)<0r5YZR/fM4AfrHBI>: master: service(imap): child 238359 killed with signal 11 (core dumped) May 16 13:33:46 Fatal: imap(user2(a)domain.com)<Ul+kZR/fA4AfrHBI>: master: service(imap): child 238386 killed with signal 11 (core dumped) May 16 13:33:46 Fatal: imap(user3(a)domain.com)<VGOkZR/fG4AfrHBI>: master: service(imap): child 238387 killed with signal 11 (core dumped) May 16 13:34:54 Fatal: imap(user4(a)domain.com)<1WS6aR/fHoAfrHBI>: master: service(imap): child 238509 killed with signal 11 (core dumped) May 16 13:34:54 Fatal: imap(user2(a)domain.com)<mQu6aR/fBIAfrHBI>: master: service(imap): child 238508 killed with signal 11 (core dumped) May 16 13:35:27 Fatal: imap(user3(a)domain.com)<pWGYax/fE4AfrHBI>: master: service(imap): child 238589 killed with signal 11 (core dumped) May 16 13:35:27 Fatal: imap(user1(a)domain.com)<s/mgax/fG4AfrHBI>: master: service(imap): child 238590 killed with signal 11 (core dumped) ======== END Error logs ========= ======== dovecot.conf ========== # 2.3.19 (b3ad6004dc): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.19 (4eae2f79) # OS: Linux 5.10.0-14-amd64 x86_64 Debian 11.3 # Hostname: wv-imap1.wavecloud.de auth_mechanisms = plain login default_vsz_limit = 4 G dict { acl = mysql:/etc/dovecot/dovecot-dict-sql.conf } first_valid_gid = 5000 first_valid_uid = 5000 imap_capability = +XDOVECOT last_valid_gid = 5000 last_valid_uid = 5000 listen = 10.10.115.XX login_trusted_networks = 10.10.115.XX 10.10.115.XX mail_location = maildir:~/ mail_log_prefix = "%s(%u)<%{session}>: " mail_plugins = acl notify quota fts fts_solr virtual 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 ihave namespace { inbox = yes location = mailbox Archive { auto = subscribe special_use = \Archive } mailbox Drafts { auto = subscribe special_use = \Drafts } mailbox Junk { special_use = \Junk } mailbox Sent { auto = subscribe special_use = \Sent } mailbox "Sent Items" { auto = no special_use = \Sent } mailbox "Sent Messages" { auto = no special_use = \Sent } mailbox Spam { auto = subscribe special_use = \Junk } mailbox Trash { auto = subscribe special_use = \Trash } prefix = separator = / type = private } namespace Virtual { hidden = yes list = no location = virtual:/etc/dovecot/virtual:INDEX=/srv/vmail/_virtual/%u prefix = Virtual/ separator = / subscriptions = no } namespace shared { list = yes location = maildir:%%h:INDEX=~/shared/%%u prefix = shared/%%u/ separator = / subscriptions = no type = shared } passdb { args = /etc/dovecot/dovecot-sql-password.conf driver = sql } passdb { args = /etc/dovecot/admin-sql.conf driver = sql master = yes pass = yes } plugin { acl = vfile acl_shared_dict = proxy::acl fts = solr fts_autoindex = yes fts_solr = url=http://wv-solr1.wavecloud.de:8983/solr/dovecot/ quota = maildir:User quota quota_rule = *:storage=20G quota_rule2 = Trash:storage=+100M quota_rule3 = SPAM:ignore quota_warning = storage=95%% quota-warning 95 %u quota_warning2 = storage=80%% quota-warning 80 %u quota_warning3 = -storage=100%% quota-warning below %u sieve = ~/.dovecot.sieve sieve_before = /var/vmail/globalsieverc sieve_max_script_size = 1M sieve_quota_max_scripts = 42 sieve_quota_max_storage = 10 } protocols = imap pop3 sieve lmtp service auth { unix_listener /var/spool/postfix/private/auth { group = vmail mode = 0666 user = vmail } unix_listener auth-master { mode = 0666 } } service dict { unix_listener dict { mode = 0600 user = vmail } } service imap-login { process_min_avail = 1 service_count = 0 vsz_limit = 500 M } service lmtp { inet_listener lmtp { address = 0.0.0.0 port = 24 } } service managesieve-login { executable = /usr/lib/dovecot/managesieve-login inet_listener sieve { address = 10.10.115.10 port = 4190 } process_min_avail = 1 service_count = 1 } service managesieve { executable = /usr/local/sbin/dovecot-managesieve.sh } service pop3-login { process_min_avail = 1 service_count = 1 } service quota-warning { executable = script /usr/local/sbin/quota-warning.sh user = vmail } service stats { unix_listener stats-reader { group = vmail mode = 0660 user = vmail } unix_listener stats-writer { group = vmail mode = 0660 user = vmail } } shutdown_clients = no ssl_cert = </etc/ssl/cert.pem ssl_dh = # hidden, use -P to show it ssl_key = # hidden, use -P to show it userdb { args = /etc/dovecot/dovecot-sql.conf driver = sql } verbose_proctitle = yes protocol imap { imap_client_workarounds = delay-newmail tb-extra-mailbox-sep mail_max_userip_connections = 2048 mail_plugins = acl notify quota fts fts_solr virtual imap_quota imap_acl } protocol pop3 { mail_plugins = acl notify quota fts fts_solr virtual pop3_client_workarounds = outlook-no-nuls oe-ns-eoh pop3_uidl_format = %08Xu%08Xv } protocol lda { hostname = wv-imap1.wavecloud.de mail_fsync = optimized mail_plugins = acl notify quota fts fts_solr virtual sieve postmaster_address = postmaster(a)example.com quota_full_tempfail = yes sendmail_path = /usr/lib/sendmail } protocol sieve { managesieve_implementation_string = Dovecot Pigeonhole } protocol lmtp { mail_fsync = optimized mail_plugins = acl notify quota fts fts_solr virtual sieve } ======== END dovecot.conf ========== ======== Core-Dump ================= PID: 240475 (imap) UID: 5000 (vmail) GID: 5000 (vmail) Signal: 11 (SEGV) Timestamp: Mon 2022-05-16 13:49:56 CEST (1min 17s ago) Command Line: dovecot/imap [user1(a)domain.com XX.XX.XX.XX MYRIGHTS] Executable: /usr/lib/dovecot/imap Control Group: /system.slice/dovecot.service Unit: dovecot.service Slice: system.slice Boot ID: acb78ce2252049778ff969755d277453 Machine ID: 1367ff1e75be457cacbf5e204a28711b Hostname: wv-imap1 Storage: /var/lib/systemd/coredump/core.imap.5000.acb78ce2252049778ff969755d277453.240475.1652701796000000.zst Message: Process 240475 (imap) of user 5000 dumped core. Stack trace of thread 240475: #0 0x00007f5db938c17c acl_mailbox_get_aclobj (lib01_acl_plugin.so + 0xf17c) #1 0x00007f5db93776ed n/a (lib02_imap_acl_plugin.so + 0x36ed) #2 0x000055f5568444d4 command_exec (imap + 0x224d4) #3 0x000055f55684244f n/a (imap + 0x2044f) #4 0x000055f5568424fa n/a (imap + 0x204fa) #5 0x000055f5568429d5 client_handle_input (imap + 0x209d5) #6 0x000055f556842f40 client_input (imap + 0x20f40) #7 0x00007f5db9682529 io_loop_call_io (libdovecot.so.0 + 0x118529) #8 0x00007f5db9683c12 io_loop_handler_run_internal (libdovecot.so.0 + 0x119c12) #9 0x00007f5db96825d0 io_loop_handler_run (libdovecot.so.0 + 0x1185d0) #10 0x00007f5db9682790 io_loop_run (libdovecot.so.0 + 0x118790) #11 0x00007f5db95f5353 master_service_run (libdovecot.so.0 + 0x8b353) #12 0x000055f556833f0a main (imap + 0x11f0a) #13 0x00007f5db93c5d0a __libc_start_main (libc.so.6 + 0x26d0a) #14 0x000055f556833fca _start (imap + 0x11fca) =========== END Core-Dump ============= -- Wavecon GmbH Anschrift: Gustavstraße 18, 90762 Fürth Website: www.wavecon.de Support: support(a)wavecon.de Telefon: +49 (0)911-1206581 (werktags von 9 - 17 Uhr) Hotline 24/7: 0800-WAVECON Fax: +49 (0)911-2129233 Registernummer: HRB Fürth 18164 GF: Cemil Degirmenci UstID: DE251398082 Pflichtinformationen nach Art. 13 DSGVO siehe wavecon.de/de/datenschutz

3 5

TLS renegotiation issue (CVE-2011-1473) in Dovecot
by Greg Earle 16 May '22

16 May '22

Hello, At work I'm running a Dovecot 2.3.15 server on a RHEL 7.9 system with OpenSSL 1.0.2k. Our IT Security people are threatening to shut it down because of this: > We were notified of a possible TLS renegotiation vulnerability on > [FQHN]. > > [Parent organization] ticket NNNNNNN is open to track efforts. > > We conducted a manual test on the site for TLS Renegotiation on IMAP > port 993. > > We found that this was set to enabled. > > In order to remediate we will need to either: > > 1. Disable Renegotiation (preferred) > 2. Set a max aggregated renegotiation > > Please remediate as soon as possible. > > References: > > https://support.f5.com/csp/article/K15278 > > https://nvd.nist.gov/vuln/detail/cve-2011-1473 > > https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-1473 I did some Googling and among the results, I found a few old posts from this mailing list among them, which to summarize basically seemed to say "Yeah, we could write some code ... " but that was about it. The IT Security rep sent me a reference to an ancient Red Hat article https://access.redhat.com/articles/23543 which is hysterical - ancient history, references NSS and Tomcat, suggests changes to an add-on product (Red Hat Certificate Server) that is EOL, etc. Is there any way to mitigate this issue? (The only thing I can think of is to upgrade the Dovecot server to RHEL 8 and restrict connections to only TLSv1.3, but that ain't gonna happen overnight.) Thanks, - Greg

3 2

Duplicate messages if message is moved when using dsync
by Thom Pol 16 May '22

16 May '22

Hi, Hope you are well. We have a cluster of 2 Dovecot servers, both on v2.3.13 (89f716dc2), using dsync to sync the messages between them. Previously, we used TCPS to sync the messages, but after some testing, we concluded that syncing over SSH resulted in a lot less failed syncs, so we started using SSH. The change has been a success, but I now notice a issue when a email client immediately moves a messages to a separate folder while Dovecot is syncing, where the message is seen twice in the folder (with the exact same headers/content). For example, I have set a filter in my email client, Thunderbird, to immediately move all emails coming from this list to a separate folder. When opening that folder, I do not see one, but two unread messages, both identical to each other. When checking the directories on the server, I see this: mx1: /var/vmail/example.com/joe/Maildir/.Subdir.Subdir/cur/1652615808.M190190P990486.mx2,S=19089,W=19384:2,S /var/vmail/example.com/joe/Maildir/.Subdir.Subdir/cur/1652615811.M180050P1376677.mx1,S=19089,W=19384:2,S mx2: /var/vmail/example.com/joe/Maildir/.Subdir.Subdir/cur/1652615811.M981426P990530.mx2,S=19089,W=19384:2,S /var/vmail/example.com/joe/Maildir/.Subdir.Subdir/cur/1652615808.M190190P990486.mx2,S=19089,W=19384:2,S Note the difference: on mx1, one indicates mx1, and one mx2, while on the other server, both indicate mx2/ Any idea (other then telling end-users not to use such filters) how we could prevent these duplicate messages? This is our config: # Pigeonhole version 0.5.13 (cdd19fe3) # OS: Linux 5.10.0-13-cloud-amd64 x86_64 Debian 11.3 # Hostname: mx1.example.com auth_mechanisms = plain login disable_plaintext_auth = no dsync_remote_cmd = ssh -p 222 -l%{login} %{host} doveadm dsync-server -u%u 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 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 { mail_replica = remote:root@mx2.example.com 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 } protocols = imap pop3 lmtp replication_max_conns = 50 service aggregator { fifo_listener replication-notify-fifo { mode = 0666 user = vmail } unix_listener replication-notify { mode = 0666 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 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 = 0666 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 = kEECDH:+kEECDH+SHA:kEDH:+kEDH+SHA:+kEDH+CAMELLIA:kECDH:+kECDH+SHA:kRSA:+kRSA+SHA:+kRSA+CAMELLIA:!aNULL:!eNULL:!SSLv2:!RC4:!MD5:!DES:!EXP:!SEED:!IDEA:!3DES 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 userdb { driver = prefetch } userdb { args = /etc/dovecot/dovecot-sql.conf driver = sql } protocol imap { auth_verbose = yes mail_plugins = quota quota imap_quota quota notify replication } protocol pop3 { auth_verbose = yes mail_plugins = quota quota quota notify replication pop3_uidl_format = %08Xu%08Xv } protocol lda { mail_plugins = quota sieve quota sieve quota notify replication postmaster_address = postmaster(a)mx1.example.com } protocol lmtp { mail_plugins = quota quota sieve sieve quota notify replication postmaster_address = postmaster(a)mx1.example.com } Thanks in advance for your thoughts. Kind regards, Thom Pol

2 1

Use different log files
by Cristiano Deana 16 May '22

16 May '22

Hi, I have a mailserver with dovecot logging to syslog (by default, to /var/log/maillog) and my MTA (postfix) is doing the same. I use dovecot's services imap/pop3, auth and lmtp and now logs files are hard to read because I havve all together MTA and these services. Is it possibile to have different log with different services? Example: auth logging: /var/log/mail.auth delivery: /var/log/mail.delivery and so on Thank you -- ############################### # Cristiano Deana # # # # Senior Network Engineer # # Digital Response Team # # CittaStudi S.p.a. # # off. +39 015 855 1172 # # cell +39 328 310 6392 # ###############################

3 2

Re: TLS renegotiation issue (CVE-2011-1473) in Dovecot
by Greg Earle 16 May '22

16 May '22

On 13 May 2022, at 19:38, Elisamuel Resto <sam(a)samresto.dev> wrote: > I believe this to be a configuration error, not a dovecot problem. > The > output of dovecot -n (as an attachment; look it over for any data you > do > not want publicized) would help to suggest changes to bring you back > into compliance. Elisamuel, I'm not really sure why you think it's a configuration error, but I'll attach the "dovecot -n" output. Thanks, - Greg

3 2

Dovecot v2.3.19 released
by Aki Tuomi 16 May '22

16 May '22

Hi all! We are pleased to release v2.3.19 of Dovecot. The docker images have been upgraded to use bullseye as base image. https://dovecot.org/releases/2.3/dovecot-2.3.19.tar.gz https://dovecot.org/releases/2.3/dovecot-2.3.19.tar.gz.sig Binary packages in https://repo.dovecot.org/ Docker images in https://hub.docker.com/r/dovecot/dovecot Regards, Aki Tuomi Open-Xchange oy -- + Added mail_user_session_finished event, which is emitted when the mail user session is finished (e.g. imap, pop3, lmtp). It also includes fields with some process statistics information. See https://doc.dovecot.org/admin_manual/list_of_events/ for more information. + Added process_shutdown_filter setting. When an event matches the filter, the process will be shutdown after the current connection(s) have finished. This is intended to reduce memory usage of long-running imap processes that keep a lot of memory allocated instead of freeing it to the OS. + auth: Add cache hit indicator to auth passdb/userdb finished events. See https://doc.dovecot.org/admin_manual/list_of_events/ for more information. + doveadm deduplicate: Performance is improved significantly. + imapc: COPY commands were sent one mail at a time to the remote IMAP server. Now the copying is buffered, so multiple mails can be copied with a single COPY command. + lib-lua: Add a Lua interface to Dovecot's HTTP client library. See https://doc.dovecot.org/admin_manual/lua/ for more information. - auth: Cache lookup would use incorrect cache key after username change. - auth: Improve handling unexpected LDAP connection errors/hangs. Try to fix up these cases by reconnecting to the LDAP server and aborting LDAP requests earlier. - auth: Process crashed if userdb iteration was attempted while auth-workers were already full handling auth requests. - auth: db-oauth2: Using %{oauth2:name} variables caused unnecessary introspection requests. - dict: Timeouts may have been leaked at deinit. - director: Ring may have become unstable if a backend's tag was changed. It could also have caused director process to crash. - doveadm kick: Numeric parameter was treated as IP address. - doveadm: Proxying can panic when flushing print output. Fixes Panic: file ioloop.c: line 865 (io_loop_destroy): assertion failed: (ioloop == current_ioloop). - doveadm sync: BROKENCHAR was wrongly changed to '_' character when migrating mailboxes. This was set by default to %, so any mailbox names containing % characters were modified to "_25". - imapc: Copying or moving mails with doveadm to an imapc mailbox could have produced "Error: Syncing mailbox '[...]' failed" Errors. The operation itself succeeded but attempting to sync the destination mailbox failed. - imapc: Prevent index log synchronization errors when two or more imapc sessions are adding messages to the same mailbox index files, i.e. INDEX=MEMORY is not used. - indexer: Process was slowly leaking memory for each indexing request. - lib-fts: fts header filters caused binary content to be sent to the indexer with non-default configuration. - doveadm-server: Process could hang in some situations when printing output to TCP client, e.g. when printing doveadm sync state. - lib-index: dovecot.index.log files were often read and parsed entirely, rather than only the parts that were actually necessary. This mainly increased CPU usage. - lmtp-proxy: Session ID forwarding would cause same session IDs being used when delivering same mail to multiple backends. - log: Log prefix update may have been lost if log process was busy. This could have caused log prefixes to be empty or in some cases reused between sessions, i.e. log lines could have been logged for the wrong user/session. - mail_crypt: Plugin crashes if it's loaded only for some users. Fixes Panic: Module context mail_crypt_user_module missing. - mail_crypt: When LMTP was delivering mails to both recipients with mail encryption enabled and not enabled, the non-encrypted recipients may have gotten mails encrypted anyway. This happened when the first recipient was encrypted (mail_crypt_save_version=2) and the 2nd recipient was not encrypted (mail_crypt_save_version=0). - pop3: Session would crash if empty line was sent. - stats: HTTP server leaked memory. - submission-login: Long credentials, such as OAUTH2 tokens, were refused during SASL interactive due to submission server applying line length limits. - submission-login: When proxying to remote host, authentication was not using interactive SASL when logging in using long credentials such as OAUTH2 tokens. This caused authentication to fail due to line length constraints in SMTP protocol. - submission: Terminating the client connection with QUIT command after mail transaction is started with MAIL command and before it is finished with DATA/BDAT can cause a segfault crash. - virtual: doveadm search queries with mailbox-guid as the only parameter crashes: Panic: file virtual-search.c: line 77 (virtual_search_get_records): assertion failed: (result != 0)

12 20

Recovering deleted mailbox
by Sean McBride 14 May '22

14 May '22

Hi all, I have a user (coworker) that accidentally deleted a mailbox and all its sub-mailboxes. I use Maildir format storage. I have backups. Is it enough to put the mailbox folder back where it was? I'm talking about the folder that contains 'cur', 'new', 'tmp', 'dovecot-uidlist', etc. Or would this desynchronize or otherwise confuse dovecot? Or is it preferable to use some doveadm command? Or...? Thanks, Sean

6 13

how is the "Total number of known users" reported by doveadm replicator calculted?
by Arnaud Abélard 14 May '22

14 May '22

Hello, I have a question regarding the "Total number of known users" displayed by doveadm replicator status. How is it calculated? Shouldn't it match the number of users reported by doveadm user '*' ? I have 3 servers being replicated, the "total number of known users" a lot higher than the number of users reports by doveadm user '*' why is that? Arnaud -- Arnaud Abélard Responsable Service Infrastructures DSIN Université de Nantes -

2 1

FTS solr or xapian and Public Folders
by David Williams 13 May '22

13 May '22

Hi all I hope someone can help with this. I'm looking at setting up FTS on a Dovecot server which has some quite big pubic folders (100,000+ emails each) and would appreciate some info about how fts both Xapian and Solr works with public folders. As background of the folders can receive emails and I use a dummy user and an alias file to deliver them for example testfolder: dummy+Public/MYTESTFOLDER(a)example.com delivers email addressed to testfolder(a)example.com to MYTESTFOLDER in the namespace Public. Has anyone successfully setup FTS with public folders using either Xapian or Solr and what happens when one user changes a folder, does that change show up for other users? E.G.: When an email is delivered by dummy and indexed will that email be indexed for other users as well? Similarly what happens that when an email is moved between, deleted from or copied to public folders by one user will that change then show up for the other users or not? I guess the basic question is: Are public folders indexed once and then the indexes are made available to each user with access or are they indexed for each user? Any info or experience that anyone has will be appreciated. Many thanks David

2 1

copy recursive mails from one account to another
by Alex 12 May '22

12 May '22

Hi. I tried to copy a mailbox on the same server from src-account1 to dest-account2 and tried to follow this page https://doc.dovecot.org/admin_manual/migrating_mailboxes/ I have tried to get this command running via IMAP but sadly I was not able to bring it up and running. doveadm -D backup -u src-account1 -R dest-account2 This was working but only for INBOX, is there a option to copy the src-account1 recursively? doveadm -D copy -u dest-account2 INBOX user src-account1 Please can anybody recommend a command to copy recursively mails from one mailbox to another on the same server. ``` doveadm config -n # 2.2.36.4 (baf9232c1): /etc/dovecot/dovecot.conf # Pigeonhole version 0.4.24.2 (aaba65b7) # OS: Linux 3.10.0-1160.59.1.el7.x86_64 x86_64 CentOS Linux release 7.9.2009 (Core) # Hostname: mail.DOMAIN.com auth_master_user_separator = * auth_mechanisms = PLAIN LOGIN deliver_log_format = from=%{from}, envelope_sender=%{from_envelope}, subject=%{subject}, msgid=%m, size=%{size}, %$ dict { acl = mysql:/etc/dovecot/dovecot-share-folder.conf quotadict = mysql:/etc/dovecot/dovecot-used-quota.conf } first_valid_uid = 2000 last_valid_uid = 2000 listen = * [::] mail_attribute_dict = file:%Lh/dovecot-attributes mail_gid = 2000 mail_location = maildir:%Lh/Maildir/:INDEX=%Lh/Maildir/ mail_plugins = quota mailbox_alias acl mail_log notify stats mail_prefetch_count = 20 mail_uid = 2000 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 = yes location = mailbox Archive { auto = no special_use = \Archive } mailbox Archives { auto = no special_use = \Archive } mailbox "Deleted Messages" { auto = no special_use = \Trash } mailbox Drafts { auto = subscribe special_use = \Drafts } mailbox Junk { auto = subscribe special_use = \Junk } mailbox "Junk E-mail" { auto = no special_use = \Junk } mailbox Sent { auto = subscribe special_use = \Sent } mailbox "Sent Items" { auto = no special_use = \Sent } mailbox "Sent Messages" { auto = no special_use = \Sent } mailbox Spam { auto = no special_use = \Junk } mailbox Trash { auto = subscribe special_use = \Trash } prefix = separator = / type = private } namespace { list = children location = maildir:%%Lh/Maildir/:INDEXPVT=%%Lh/Maildir/Shared/%%Ld/%%Ln prefix = Shared/%%u/ separator = / subscriptions = yes type = shared } passdb { args = /etc/dovecot/dovecot-mysql.conf driver = sql } passdb { args = /etc/dovecot/dovecot-master-users driver = passwd-file master = yes } plugin { acl = vfile acl_shared_dict = proxy::acl imapsieve_mailbox1_before = file:/var/vmail/sieve/report_spam.sieve imapsieve_mailbox1_causes = COPY APPEND imapsieve_mailbox1_name = Junk imapsieve_mailbox2_before = file:/var/vmail/sieve/report_ham.sieve imapsieve_mailbox2_causes = COPY imapsieve_mailbox2_from = Junk imapsieve_mailbox2_name = * imapsieve_url = sieve://192.168.122.173:4190 mail_log_events = delete undelete expunge mailbox_delete mailbox_rename mail_log_fields = uid box msgid size from subject mailbox_alias_new = Sent Messages mailbox_alias_new2 = Sent Items mailbox_alias_old = Sent mailbox_alias_old2 = Sent quota = dict:user::proxy::quotadict quota_grace = 10%% quota_warning = storage=100%% quota-warning 100 %u quota_warning2 = storage=95%% quota-warning 95 %u quota_warning3 = storage=90%% quota-warning 90 %u quota_warning4 = storage=85%% quota-warning 85 %u sieve = ~/sieve/dovecot.sieve sieve_before = /var/vmail/sieve/dovecot.sieve sieve_dir = ~/sieve sieve_global_dir = /var/vmail/sieve sieve_global_extensions = +vnd.dovecot.pipe +vnd.dovecot.environment sieve_max_redirects = 30 sieve_pipe_bin_dir = /etc/dovecot/sieve/pipe sieve_plugins = sieve_imapsieve sieve_extprograms sieve_vacation_send_from_recipient = yes stats_refresh = 30 secs stats_track_cmds = yes } protocols = imap sieve lmtp recipient_delimiter = - service auth { unix_listener /var/spool/postfix/private/dovecot-auth { group = postfix mode = 0666 user = postfix } unix_listener auth-master { group = vmail mode = 0666 user = vmail } unix_listener auth-userdb { group = vmail mode = 0660 user = vmail } } service dict { unix_listener dict { group = vmail mode = 0660 user = vmail } } service imap-login { process_limit = 500 service_count = 1 } service lmtp { executable = lmtp -L inet_listener lmtp { address = 127.0.0.1 port = 24 } 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 { port = 4190 } } service pop3-login { service_count = 1 } service quota-warning { executable = script /usr/local/bin/dovecot-quota-warning.sh unix_listener quota-warning { group = vmail mode = 0660 user = vmail } } service stats { fifo_listener stats-mail { mode = 0644 user = vmail } inet_listener { address = 127.0.0.1 port = 24242 } } ssl = required ssl_cert = </etc/pki/tls/certs/iRedMail.crt ssl_cipher_list = EECDH+CHACHA20:ECDH+AESGCM:DH+AESGCM:ECDH+AES256:DH+AES256:ECDH+AES128:DH+AES:ECDH+3DES:DH+3DES:RSA+AESGCM:RSA+AES:RSA+3DES:!aNULL:!MD5 ssl_key = # hidden, use -P to show it ssl_prefer_server_ciphers = yes syslog_facility = local5 userdb { args = /etc/dovecot/dovecot-mysql.conf driver = sql } protocol lda { lda_mailbox_autocreate = yes lda_mailbox_autosubscribe = yes mail_plugins = quota mailbox_alias acl mail_log notify stats sieve recipient_delimiter = - } protocol lmtp { lmtp_save_to_detail_mailbox = yes mail_plugins = quota sieve recipient_delimiter = - } protocol imap { imap_client_workarounds = tb-extra-mailbox-sep mail_max_userip_connections = 30 mail_plugins = quota mailbox_alias acl mail_log notify stats imap_quota imap_acl imap_stats imap_sieve } protocol pop3 { mail_max_userip_connections = 30 mail_plugins = quota mailbox_alias acl mail_log notify stats pop3_client_workarounds = outlook-no-nuls oe-ns-eoh pop3_uidl_format = %08Xu%08Xv } ``` Regards Alex

2 1

no full syncs after upgrading to dovecot 2.3.18
by Arnaud Abélard 12 May '22

12 May '22

Hello, I am working on replicating a server (and adding compression on the other side) and since I had "Error: dsync I/O has stalled, no activity for 600 seconds (version not received)" errors I upgraded both source and destination server with the latest 2.3 version (2.3.18). While before the upgrade all the 15 replication connections were busy after upgrading dovecot replicator dsync-status shows that most of the time nothing is being replicated at all. I can see some brief replications that last, but 99,9% of the time nothing is happening at all. I have a replication_full_sync_interval of 12 hours but I have thousands of users with their last full sync over 90 hours ago. "doveadm replicator status" also shows that i have over 35,000 queued full resync requests, but no sync, high or low queued requests so why aren't the full requests occuring? There are no errors in the logs. Thanks, Arnaud -- Arnaud Abélard Responsable pôle Système et Stockage Service Infrastructures DSIN Université de Nantes -

8 19

Pigeonhole v0.5.19 released
by Aki Tuomi 11 May '22

11 May '22

Hi all! We are pleased to release v0.5.19 of Pigeonhole. This release is done to maintain parity with dovecot 2.3.19 release, so it does not contain any news-worthy changes. https://pigeonhole.dovecot.org/releases/2.3/dovecot-2.3-pigeonhole-0.5.18.t… https://pigeonhole.dovecot.org/releases/2.3/dovecot-2.3-pigeonhole-0.5.18.t… Binary packages in https://repo.dovecot.org/ Docker images in https://hub.docker.com/r/dovecot/dovecot Regards, Aki Tuomi Open-Xchange oy

1 1

dovecot + sieve: message recovery possible after rule pointed to invalid mailbox?
by Charles Gresham 09 May '22

09 May '22

Hi all, we face the following situation: 1, Customer created a mailbox (aka subfolder) "ABC" and setup a Pigeonhole Sieve script to file the messages into it. So fine, so good. All seemed to work out well. 2. Customer renamed the mailbox to, let's say, "CDE" and did not change the Sieve script accordingly. 3. We noticed this from a ~/.dovecot.sieve.log (after getting a complaint that messages were not arriving properly anymore :-o ): " sieve: info: started log at Apr 28 07:41:11. error: msgid=<433788c81ea044c4ae49cb39a6f673f3(a)ALB-DC-EXC08.CLPL.INTERN>: failed to store into mailbox 'ABC': Internal error occurred. Refer to server log for more information. [2022-04-28 07:41:10]. " Does anybody in this list know if all these messages went to /dev/null - or else? If the latter: where/can we restore the messages? Which "server log" is meant in this error message? I couldn't find the information needed by going through https://doc.dovecot.org/configuration_manual/sieve/ <https://doc.dovecot.org/configuration_manual/sieve/#> but I wonder if all the messages end in digital nirvana if a user sieve script points to non-existing mailboxes? Thanks for any hint. Greetings, C.

3 3

IMAP connection lost while sending mail
by Philipp Ewald 06 May '22

06 May '22

Hello, we have a strange problem. Costumer use Outlook to connect to our IMAP and SMTP Server. While sending Mails Outlooks reports connection lost. In Mail log there is no reason logged or something else. What i dont understand is that IMAP lose connetion while using SMTP. Outlloks reports problem by moving mails into Send dir. Is that a Outlook problem? i have enables debug logging and cant see any reason :( Network was already testet. any ideas? Kind regards Philipp -- Philipp Ewald Administrator DigiOnline GmbH, Probsteigasse 15 - 19, 50670 Köln Fax: +49 221 6500-690, E-Mail: philipp.ewald(a)digionline.de AG Köln HRB 27711, St.-Nr. 5215 5811 0640 Geschäftsführer: Werner Grafenhain Informationen zum Datenschutz: www.digionline.de/ds

3 4

disable attachments indexing
by Erik Colson 04 May '22

04 May '22

Hello, I am using fts-xapian with dovecot as fts indexer. It does work nicely but I would like to tell the indexer to *not* index the attachments. Can this be configured ? thanks -- erik colson

1 0

Authentication type for lan and haproxy (internet)
by Kees van Vloten 29 Apr '22

29 Apr '22

Hi Team, Would it be possible to setup a different authentication method depending on the connection source? I would like to use oauth2 (with mfa) for connections from internet via haproxy, whereas on the lan I run samba-dc and hence AD (krb5) is the method to use. The latter is already setup and works fine, now I want to add oauth2 for haproxy connections (or outside lan ip-range). Here's the relevant bit of "dovecot -n": auth_default_realm = EXAMPLE.COM auth_gssapi_hostname = mailserver.example.com auth_krb5_keytab = /etc/keytab/dovecot.keytab auth_master_user_separator = * auth_mechanisms = gssapi gss-spnego plain auth_realms = EXAMPLE.COM passdb { args = /etc/dovecot/dovecot-ldap.conf.ext driver = ldap pass = yes } passdb { driver = pam } userdb { args = /etc/dovecot/dovecot-ldap.conf.ext driver = ldap } - Kees.

1 0

director service tries to start without any configuration
by Eirik Rye 29 Apr '22

29 Apr '22

Hello, - Dovecot 2.3.18 (originally Dovecot 2.3.16, but upgraded in an attempt to fix issue) - Ubuntu 20.04 using Dovecot repo In my organization have run a cluster of dovecot proxy machines, with the director service enabled in a transition period as we have migrated all our users to do direct proxying to backend (e.g. `proxy=y, host=192.168.0.2`), bypassing the director service. Now that all users have been migrated, it is time to disable the director service. However, even after removing all director configuration ("doveconf -n | grep director" returns nothing) and restarting the entire dovecot service (not just "doveadm reload"), the error log still spits out these errors: 2022-04-29T11:27:25+0200 director: Error: Empty server list 2022-04-29T11:27:25+0200 director: Fatal: Invalid value for director_mail_servers setting 2022-04-29T11:27:25+0200 master: Error: service(director): command startup failed, throttling for 60.000 secs Why is this happening? It's not critical, and logins work fine without the director service running, but I'm trying to figure out why and stop the log noise. doveconf stuff: root@director03:~# doveconf -n | grep director # Hostname: director03 root@director03:~# doveconf -n # 2.3.18 (9dd8408c18): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.18 (0bc28b32) # OS: Linux 5.4.0-88-generic x86_64 Ubuntu 20.04.4 LTS # Hostname: director03 debug_log_path = /var/log/dovecot.log default_vsz_limit = 768 M disable_plaintext_auth = no doveadm_password = # hidden, use -P to show it doveadm_port = 24245 event_exporter log { format = json format_args = time-rfc3339 transport = log } imap_id_retain = yes info_log_path = /var/log/dovecot.log lmtp_add_received_header = no lmtp_proxy = yes log_path = /var/log/dovecot.err log_timestamp = "%FT%T%z " login_greeting = %{hostname} ready. login_log_format_elements = user=<%u> orig=<%{orig_user}> method=%m proto=%s rip=%r lip=%l session=<%{session}> %c %k login_proxy_max_disconnect_delay = 10 secs login_trusted_networks = <redacted> 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 metric auth_passdb_request_finished { filter = event=auth_passdb_request_finished AND category=service:auth group_by = service passdb_name result } passdb { args = /etc/dovecot/dovecot-redis.conf.ext auth_verbose = yes driver = dict name = redis override_fields = proxy=y } protocols = imap pop3 lmtp sieve service doveadm { inet_listener http { port = 8080 } } service imap-login { client_limit = 2048 executable = imap-login inet_listener imap { address = port = 143 } inet_listener imaps { address = port = 993 ssl = yes } process_limit = 32 process_min_avail = 16 service_count = 0 vsz_limit = 1 G } service lmtp { inet_listener lmtp { port = 24 } } service managesieve-login { client_limit = 1024 executable = managesieve-login inet_listener sieve { address = port = 4190 } process_limit = 2 process_min_avail = 1 service_count = 0 vsz_limit = 1 G } service pop3-login { client_limit = 2048 executable = pop3-login inet_listener pop3 { address = port = 110 } inet_listener pop3s { address = port = 995 ssl = yes } process_limit = 4 process_min_avail = 2 service_count = 0 vsz_limit = 1 G } service stats { client_limit = 65536 inet_listener http { port = 9900 } } ssl_cert = </etc/dovecot/wildcard.crt ssl_cipher_list = ALL:!LOW:!SSLv2:!EXP:!aNULL ssl_dh = # hidden, use -P to show it ssl_key = # hidden, use -P to show it ssl_min_protocol = TLSv1 verbose_proctitle = yes protocol imap { mail_max_userip_connections = 25 } protocol pop { mail_max_userip_connections = 25 } local 127.0.0.0/8 { doveadm_password = # hidden, use -P to show it }

2 3

Informational messages written to ~/.dovecot.sieve.log
by Gedalya 29 Apr '22

29 Apr '22

Hi, After adding "vnd.dovecot.debug" to the require list at the top of a sieve script, informational messages started appearing in ~/.dovecot.sieve.log, even when debug_log was not used. The script looks like this: require ["fileinto","imap4flags","reject","duplicate","vnd.dovecot.debug"]; # rule:[Duplicate] if duplicate :header "X-dd-hash" :last { debug_log "Duplicate message, discarding"; discard; } [ .. more rules .. ] Log lines: sieve: info: started log at 2022-04-28 23:49:43 -0400. info: msgid=<xxxxxxxxx>: stored mail into mailbox 'INBOX'. (no rule matched) sieve: info: started log at 2022-04-29 00:51:40 -0400. info: msgid=<xxxxxxxxx>: fileinto action: stored mail into mailbox 'Alerts'. I would expect / prefer that the log would be used only when debug_log was used. With too many log messages, the interesting ones would get rotated out sooner than desired.

1 0

Can I set a different certificate per listen port?
by Kees van Vloten 28 Apr '22

28 Apr '22

Hi all, I am trying to setup dovecot to listen to imaps on the local network and through haproxy from the internet. service imap-login { inet_listener imaps { port = 993 ssl = yes } inet_listener imaps_haproxy { haproxy = yes port = 10993 ssl = yes } } Obviously the dns-name on the internet connection (10993) is different than on the lan (993). In the docs (https://doc.dovecot.org/configuration_manual/dovecot_ssl_configuration/) I found multiple options, but unfortunately none of those have the option to distinguish per listen port. Is there a way to setup two different certificates for the two listeners? - Kees

3 3

master user namespace error?
by Thomas Winterstein 26 Apr '22

26 Apr '22

Hello, I've set up a master user for migration purposes and doveadm auth tests succeed. If I test with telnet, the login as user also works and performs a user search on ldap but I get a namespace error: > Debug: ldap(testuser,1.2.3.4,<0o/OTasGHdfNCB>): Finished userdb lookup > Debug: master userdb out: USER#011911998977#011testuser#011uid=500#011gid=500#011nopassword=<hidden>#011proxy_maybe=yes#011master_user=admin#011auth_mech=PLAIN#011auth_token=b8c3dfdfcc9ac33cb1c2f1d755g8e04db58a7aa0#011auth_user=admin > imap-login: Login: user=<testuser>, method=PLAIN, rip=1.2.3.4, lip=5.6.7.8, mpid=22569, TLS, session=<0o/OTasGHdfNCB> > Error: Namespace '': Mail storage autodetection failed with home=(not set) > Disconnected: Namespace '': Mail storage autodetection failed with home=(not set) in=0 out=417 deleted=0 expunged=0 trashed=0 hdr_count=0 hdr_bytes=0 body_count=0 body_bytes Anything special to consider in a proxy setup? thank you Thomas

1 0

how to setup IMAPs with letsencrypt
by alice＠coakmail.com 26 Apr '22

26 Apr '22

hello I have setup website using letsencrypt for certification. how can I setup IMAP to use this certs as well? Thank you.

10 20

Heads-up: Exim 4.96 RC0 may break your Dovecot LDA delivery
by Kirill Miazine 25 Apr '22

25 Apr '22

Hi, all The just released RC0 for Exim 4.96 will break Dovecot LDA delivery as described on https://wiki.dovecot.org/LDA/Exim Here is the relevant ChangeLog entry: JH/25 Taint-check exec arguments for transport-initiated external processes. Previously, tainted values could be used. This affects "pipe", "lmtp" and "queryprogram" transport, transport-filter, and ETRN commands. The ${run} expansion is also affected: in "preexpand" mode no part of the command line may be tainted, in default mode the executable name may not be tainted. As of now I don't have a personal working solution to get untained data. I did try a small hack, but Exim was smart enough to see what I was doing. -- -- Kirill Miazine <km(a)krot.org>

2 3

doveadm pw usage
by ミユナ (alice) 25 Apr '22

25 Apr '22

Hello when i want to assign a password to a user, I need to write the plain passwd to a text file then do: # doveadm pw -p input.txt {CRAM-MD5}77180880... it's not that convenient to write to a file first. does it support the format below? doveadm pw "plain password" providing the plain password as CL argument to generate a encrypted one. thank you ミユナ alice

5 6

auth between postfix and dovecot?
by ミユナ (alice) 25 Apr '22

25 Apr '22

hello experts, I have installed postfix and dovecot in the same machine. Their configure looks as: service lmtp { unix_listener /var/spool/postfix/private/dovecot-lmtp { mode = 0600 user = postfix group = postfix } unix_listener /var/spool/postfix/private/auth { mode = 0666 user = postfix group = postfix } auth_mechanisms = plain login !include auth-passwdfile.conf.ext my question is: when postfix talks to dovecot, does it require user's username/password for authentication? or this communication just goes without authentication? I asked this, b/c my webmail send mail from localhost has been going without authentication to postifx. so i am not sure if postfix talks to dovecot without requiring auth too. Thanks alice

4 6

Weird status... " noselect"... why ?
by Stephane Magnier 23 Apr '22

23 Apr '22

a list "" * gives me this * LIST (\HasChildren \UnMarked) "/" INBOX/2022-PERSONNEL/FOO2 * LIST (\HasNoChildren \UnMarked) "/" INBOX/2022-PERSONNEL/FOO2/test * LIST (\Noselect \HasChildren) "/" INBOX/2022-PERSONNEL/FOO2/test * LIST(\Noselect \HasNoChildren) "/" INBOX/2022-PERSONNEL/FOO2/test/Location As you can see there is " noselect " and with Thunderbird this is in grey.. Due to a bad manipulation. I wanted to create a subfolder and I wrote "FOO2/test" when FOO2 didn't exist yet Now " test" is grey and I cannot place anything inside.. I didn't see this at first sight and I've placed important emails in it, that it didin't synch... and which which seems to be lost :-( a Repair didn't work out How can I " revalidate " this folder ? without removing it ? ( hoping to get something in it ) Thanks

2 1

replication fails with "Error: sync: Unknown user in remote" but user shows up in doveadm user "*"
by Arnaud Abélard 22 Apr '22

22 Apr '22

Hello, I've been trying to replicate a production server (debian buster, dovecot 2.3.4.1). But I nothing is actually being replicated and for each attempted user the message "Error: sync: Unknown user in remote" is being logged. The ldap settings are actually the same on both server (source and destnation) and the "unknown user" is actually showing up in doveadm user "*" on the destination server. I had already replicated 2 servers and used the same settings. Am I missing something obvious here? Thanks, Arnaud -- Arnaud Abélard Responsable pôle Système et Stockage Service Infrastructures DSIN Université de Nantes -

2 2

disabling namespace in special-userdb on dovecot 2.2
by Marc 22 Apr '22

22 Apr '22

Currently I have such special-userdb file test:x:11111:22222:testaccount_descr:/home/users/testaccount:/bin/false:userdb_mail=mbox:~/mbox:INBOX=/home/users/testaccount/inbox:INDEX=/home/users/testaccount/index However I am still getting errors of a default configured namespace that still seems to be active. Is there a way to disable this namespace or reconfigure this in the userdb file? (When I was testing this on a dovecot 2.3 I did not run into this)

2 2

Both Roundcube and Squirrelmail webmail cannot search for anything + cannot open many emails because there are more than 200, 000 emails in my Inbox
by Turritopsis Dohrnii Teo En Ming 20 Apr '22

20 Apr '22

Subject: Both Roundcube and Squirrelmail webmail cannot search for anything + cannot open many emails because there are more than 200,000 emails in my Inbox Good day from Singapore, I am using Virtualmin/Webmin web hosting control panel in my Virtual Private Servers (VPS) in Germany. [1st issue] =========== Both Roundcube and Squirrelmail webmail cannot search for anything because there are more than 200,000 emails in my Inbox. Roundcube webmail doesn't show any error. Search results simply don't show up after a long time. However, I got the following error in Squirrelmail webmail (using Firefox web browser). ERROR: Connection dropped by IMAP server. Query: SEARCH CHARSET ISO-8859-1 ALL SUBJECT "keyword" [2nd issue] ============ Both Roundcube and Squirrelmail webmail cannot open many emails because there are more than 200,000 emails in my inbox. Roundcube webmail gives the following error: SERVER ERROR! Could not load message from server. Squirrelmail webmail gives the following error: ERROR: Connection dropped by IMAP server. Query: FETCH 1 BODY[HEADER] My IMAP server is Dovecot version 2.2.36. Virtualmin version is 6.17. Webmin version is 1.990. Usermin version is 1.834. Authentic theme version is 19.85.1. However, using Samsung Email app on my Samsung Galaxy A32 5G Android phone, I am able to open emails it seems. Only Roundcube and Squirrelmail webmail appears to have issues opening emails. Using Samsung Email app, I have deleted around 6,000 useless emails so far but still unable to search and open emails. Looks like I need to delete more and more useless emails. How do I solve the above problems? I am looking forward to your reply. Thank you very much. Mr. Turritopsis Dohrnii Teo En Ming, 44 years old as of 17 April 2022 Sunday, is a TARGETED INDIVIDUAL living in Singapore. He is an IT Consultant with a Systems 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-----

8 33

RE: Bad Signature - Both Roundcube and Squirrelmail webmail cannot search fos r anything + cannot open many emails because there are more than 200, 000 emails in my Inbox
by Tuomi, Aki 20 Apr '22

20 Apr '22

xxzfzzxxxzZSent from my Galaxys fcccc -------- Original message --------From: Turritopsis Dohrnii Teo En Ming <ceo.teo.en.ming(a)gmail.com> Date: 20/04/2022 16.51 (GMT+02:00) To: Shawn Heisey <elyograg(a)elyograg.org> Cc: ceo(a)teo-en-ming-corp.com, Dovecot <dovecot(a)dovecot.org> Subject: Re: Bad Signature - Both Roundcube and Squirrelmail webmail cannot search for anything + cannot open many emails because there are more than 200, 000 emails in my Inbox I believe Gmail is using IMAP. The instructions for configuring Gmailemail accounts in Outlook specifically mention IMAP server hostname:imap.gmail.comTCP Port 993, SSLRegards,Mr. Turritopsis Dohrnii Teo En MingTargeted Individual in Singapore20 Apr 2022 WednesdayOn Wed, 20 Apr 2022 at 09:26, Shawn Heisey <elyograg(a)elyograg.org> wrote:>> On 4/19/2022 5:12 PM, Turritopsis Dohrnii Teo En Ming wrote:> > It is not true that no email system was ever designed for 200,000 or> > more emails.> >> > If I did not remember wrongly, more than 10 years ago, I used to have> > a Gmail email account, with 4-5 MILLION email messages in the Inbox.> > There was no problem searching even though I had 4-5 MILLION email> > messages in the Inbox.>> If you were using either a Google app or the gmail.com website to access> that inbox, then it doesn't compare. I really doubt that either of> those uses the IMAP protocol. They would be using something proprietary> that is highly optimized for the way that Google stores data and> leverages the enormous amounts of computing power that they maintain.>> I would bet that if you accessed a gmail folder with 5 million messages> in it using IMAP, you would have similar problems with it to those that> have been described here in this thread. IMAP is a beautiful protocol,> but I don't think it was designed for handling that many messages.>> Thanks,> Shawn>

1 0

temporary block incoming messages to specific user
by Marc 20 Apr '22

20 Apr '22

Is it possible to block incoming messages from being delivered to a specific user in such a way that the MTA will try again later. I do not want these message to bounce. (eg while doing some manual maintenance on the user)?

3 2

JMAP Support Status
by David Klingenberg 15 Apr '22

15 Apr '22

Hello, has there been any development on JMAP support in Dovecot? Also, I have noticed you planned to do some generic optimizations which could possibly make it easier to implement JMAP. What is status on that? https://dovecot.org/pipermail/dovecot/2021-March/121620.html Best Regards, David Klingenberg

4 5

NFS Config vs Ceph / GlusterFS
by dovecot＠ptld.com 15 Apr '22

15 Apr '22

Do all of the configuration considerations pertaining to using NFS on https://doc.dovecot.org/configuration_manual/nfs/ equally apply to using something like Ceph / GlusterFS? And if people wouldn't mind chiming in with which (NFS, Ceph & GlusterFS) they feel is better for maildir mail storage on dedicated non-container servers? Which is better for robustness / stability? Which is better for speed / performance? Thank you.

4 4

how to change the name of the dovecot pam file being used?
by Marc 15 Apr '22

15 Apr '22

Is there a way to configure the name of the pam file?

2 1

ssl_min_protocol appears to be ignored?
by Myriam Luce 14 Apr '22

14 Apr '22

Hi, I'm trying to enable TLS1.0 support for an old client. Per dovecot -n # 2.3.7.2 (3c910f64b): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.7.2 () # OS: Linux 5.4.0-107-generic x86_64 Ubuntu 20.04.4 LTS ext4 # Hostname: In 10-ssl.conf, I have set ssl_min_protocol = TLSv1 (It doesn't show in dovecot -n, I suspect because it's equal to default value?) I restarted dovecot with systemctl. Then, from another machine, openssl s_client -connect zeserver.com:993 -tls1 fails with this output: CONNECTED(00000003) 140166917489984:error:141E70BF:SSL routines:tls_construct_client_hello:no protocols available:../ssl/statem/statem_clnt.c:1112: --- no peer certificate available --- No client certificate CA names sent --- SSL handshake has read 0 bytes and written 7 bytes Verification: OK --- New, (NONE), Cipher is (NONE) Secure Renegotiation IS NOT supported Compression: NONE Expansion: NONE No ALPN negotiated Early data was not sent Verify return code: 0 (ok) --- The same command with -tls1_2 works as intended (certificate printing, imap prompt). Am I forgetting something somewhere, or is this an actual bug?

3 2

Re: Dovecot and OAuth2 and gmail
by Richard 14 Apr '22

14 Apr '22

> Date: Wednesday, April 13, 2022 17:10:36 -0400 > From: Steve Litt <slitt(a)troubleshooters.com> > > Hi all, > > I'm not sure Dovecot has anything to do with this, but I'd rather > ask and know for sure. > > I do the following: > > Gmail IMAP=>fetchmail=>procmail=>Dovecot IMAP > > Then, I view my Dovecot hosted email with Claws-Mail. > > I understand that on May 31, 2022, current methods to access Gmail > IMAP will turn into pumpkins because of insistence on OAuth2. Do I > need to do anything to Dovecot to get ready for this Mass > Extinction Event? > > Do you think I'll need to dump fetchmail for something else? > While it's a little obtuse, a reading of: <https://support.google.com/accounts/answer/6010255#zippy=%2Cif-less-secure-…> specifically the "fix problems" / "use an app password" section, would seem to indicate that app passwords will continue to work for gmail access after May 30. What google is turning off is "third-party apps or devices which ask you to sign in to your Google Account using only your username and password", i.e., using your google login password with "less secure" 3rd party apps. So, you need to set up, and configure your application to use, app passwords.

2 1

Dovecot and OAuth2 and gmail
by Steve Litt 14 Apr '22

14 Apr '22

Hi all, I'm not sure Dovecot has anything to do with this, but I'd rather ask and know for sure. I do the following: Gmail IMAP=>fetchmail=>procmail=>Dovecot IMAP Then, I view my Dovecot hosted email with Claws-Mail. I understand that on May 31, 2022, current methods to access Gmail IMAP will turn into pumpkins because of insistence on OAuth2. Do I need to do anything to Dovecot to get ready for this Mass Extinction Event? Do you think I'll need to dump fetchmail for something else? Thanks, SteveT Steve Litt March 2022 featured book: Making Mental Models: Advanced Edition http://www.troubleshooters.com/mmm

1 0

Permissions and ownership on /dev/shm/dovecot
by doug 12 Apr '22

12 Apr '22

Hi, Environment: Dovecot 2.3.18 running on CentOS 7, mdbox, LDAP users I'm in the process of moving my mailboxes to NFS and moving with lock and index files in temp storage following instructions from https://doc.dovecot.org/configuration_manual/nfs. I set mail_location as: mail_location = mdbox:/mailstore/%u/mail:VOLATILEDIR=/dev/shm/dovecot/%u:LISTINDEX=/dev/shm/dovecot/%u/dovecot.list.index What I discovered is /dev/shm/dovecot is created by the initial user who accesses their mail from a client, and with permissions 700. This prevents subsequent users from creating their own index and lock files. # ls -l /dev/shm/dovecot total 0 drwx------ 2 mary users 60 Mar 25 10:00 mary Sample error message from maillog during mail delivery and from a dsync script. Mar 25 10:37:15 mailsrv1 dovecot: imap(doug)<19284><WKcX5gvbRe7AqFhA>: Error: mkdir(/dev/shm/dovecot/doug) failed: Permission denied (euid=1002(doug) egid=100(users) missing +x perm: /dev/shm/dovecot, dir owned by 97:100 mode=0700) dsync(test): Error: mkdir(/dev/shm/dovecot/test) failed: Permission denied (euid=2003(test) egid=100(users) missing +x perm: /dev/shm/dovecot, dir owned by 97:100 mode=0700) I couldn't locate documentation or discussions on how to set the ownership or permissions for /dev/shm/dovecot in the Dovecot configuration files. As a hack, I added this to /usr/libexec/dovecot/prestartscript. ! [[ -d /dev/shm/dovecot ]] && mkdir /dev/shm/dovecot chown dovecot:users /dev/shm/dovecot chmod 770 /dev/shm/dovecot This solved the problem, but left me wondering if I missed something obvious or if I am setting myself up for a problem later on, like with a Dovecot version upgrade. I could run these commands at bootup out of rc.local or a systemd script rather than customizing a Dovecot provided script. Is there a appropriate way of doing this that I missed? TIA, Doug

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Re: Permissions and ownership on /dev/shm/dovecot
by doug 11 Apr '22

11 Apr '22

1 0

Set up per user sieve rules
by Austin Witmer 11 Apr '22

11 Apr '22

Hello! I am struggling to wrap my mind around how to set up sieve rules for my individual users on my mail server. I set up a global sieve script file at "/var/lib/dovecot/sieve/default.sieve” and that works great. My users maildirs are located at /mnt/volume1/mailserver/maildir/user. Do I need to create a sieve script file inside of that folder for sieve scripts to work on an individual basis? If so, what permissions will that script file need? Thanks in advance for your help! Austin Witmer

4 9

Dovecot 2.3.13 virtual mailboxes subscription problem
by Slavko 10 Apr '22

10 Apr '22

Hi, by discussion on IRC channel is post details here. I am using virtual plugin in dovecot 2.3.13 and i have porblems with subsription to these virtual mailboxes. I can setup autosubscribe to them and it works as expected. I can SUBSCRIBE to them, dovecot returns OK and they are added in subscriptions file, but then they are not shown in LSUB output. I can UNSUBSCRIBE from subscribed virtual mailbox (dovecot returns OK), but it is not removed from subscriptions file and remains there... I bother with this for long time. I tried to setup mailboxes without UTF-8 chars, but that doesn't matter nad currently problematic mailbox has not any nonASCII char (Virtual.Dnes). I tried to define mailboxes in parent namespace too, doesn't help, nor defining only Virtual in parent namespace (with and without separator at end). Some evidence follows. The (my) subscriptions file (the Virtual.Dnes is at end): --------------------------------------------------------- V 2 <snip> Virtual Dnes --------------------------------------------------------- IMAP LIST (only Virtual namespace), as shown by dovecot's imap command: --------------------------------------------------------- * PREAUTH [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 STATUS=SIZE SAVEDATE LITERAL+ NOTIFY METADATA SPECIAL-USE QUOTA ACL RIGHTS=texk] Logged in as slavko(a)slavino.sk <snip> * LIST (\Noselect \HasChildren) "." Virtual * LIST (\HasNoChildren) "." Virtual.Dnes * LIST (\HasNoChildren) "." Virtual.D&APQ-le&AX4-it&AOk- * LIST (\HasNoChildren) "." Virtual.Pr&AO0-lohy * LIST (\Noselect \HasChildren) "." Verejn&AOk- * LIST (\HasNoChildren \UnMarked) "." Verejn&AOk-.Novinky . OK List completed (0.004 + 0.000 + 0.003 secs). --------------------------------------------------------- One can see that there are three virtual mailboxes, the Virtual.Dnes, the Virtual.Dôležité (encoded) and the Virtual.Prílohy (encoded too), including Virtual namespace. IMAP LSUB output (again only Virtual namespace): --------------------------------------------------------- * PREAUTH [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 STATUS=SIZE SAVEDATE LITERAL+ NOTIFY METADATA SPECIAL-USE QUOTA ACL RIGHTS=texk] Logged in as slavko(a)slavino.sk <snip> * LSUB () "." Virtual.D&APQ-le&AX4-it&AOk- * LSUB () "." Virtual.Pr&AO0-lohy a OK Lsub completed (0.001 + 0.000 secs). --------------------------------------------------------- As one can see, there are only auto-subscribed Virtual mailboxes, the Virtual.Dnes is missing, despite that it is in subscriptions file. The doveconf -n output (can be wrapped): --------------------------------------------------------- # 2.3.13 (89f716dc2): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.13 (cdd19fe3) # OS: Linux 4.19.0-20-amd64 x86_64 Debian 10.12 # Hostname: servac.skk auth_default_realm = slavino.sk auth_mechanisms = plain login auth_policy_check_after_auth = no auth_policy_hash_nonce = # hidden, use -P to show it auth_policy_server_timeout_msecs = 5500 auth_policy_server_url = http://127.0.0.1:9090/ auth_verbose = yes first_valid_uid = 130 imap_idle_notify_interval = 15 mins 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} autoexp=%{autoexpunged} last_valid_uid = 130 lda_original_recipient_header = Envelope-to lmtp_add_received_header = no lmtp_hdr_delivery_address = none lmtp_rcpt_check_quota = yes lmtp_save_to_detail_mailbox = yes login_trusted_networks = 127.0.0.1 ::1 mail_attachment_detection_options = add-flags no-flags-on-fetch exclude-inlined content-type=!application/*-signature content-type=!application/pgp-keys mail_attribute_dict = file:%h/dovecot-attributes mail_home = /srv/vmail/%Ln mail_location = maildir:~/Maildir mail_plugins = " acl fts fts_xapian notify quota virtual quota_clone" mail_privileged_group = mail mail_server_admin = mailto:postmaster@slavino.sk mail_vsize_bg_after_count = 100 mailbox_list_index_very_dirty_syncs = yes 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 vnd.dovecot.report imapsieve vnd.dovecot.imapsieve metric imap_cmd { fields = bytes_in bytes_out filter = event=imap_command_finished } metric imap_cmdbad { filter = event=imap_command_finished AND tagged_reply_state=BAD } metric imap_cmdno { filter = event=imap_command_finished AND tagged_reply_state=NO } metric imap_cmdok { filter = event=imap_command_finished AND tagged_reply_state=OK } metric mail_deliv { fields = message_size filter = event=mail_delivery_finished } metric push_notif { filter = event=push_notification_finished } metric sieve_actions { filter = event=sieve_action_finished } metric sieve_scrrun { filter = event=sieve_runtime_script_finished } namespace Virtual { list = yes location = virtual:/usr/local/etc/vmail/virtual:INDEX=~/virtual:UTF-8 mailbox Dôležité { auto = subscribe } mailbox Dnes { auto = no } mailbox Prílohy { auto = subscribe } prefix = Virtual. separator = . subscriptions = no } namespace inbox { inbox = yes location = mailbox Archive { auto = create special_use = \Archive } 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 } mailbox Verejné.Novinky { auto = subscribe } prefix = separator = . } namespace pub { ignore_on_failure = yes location = maildir:/srv/vmail-public:INDEXPVT=~/public:UTF-8 prefix = Verejné. separator = . subscriptions = no type = public } namespace share { list = children location = maildir:%%h/Maildir:INDEXPVT=~/shared/%%u prefix = Zdieľané.%%u. separator = . subscriptions = no type = shared } passdb { args = username_format=%Ln /usr/local/etc/vmail/passwd.%{if;%Ls;eq;smtp;%Ls;empty} auth_verbose = no driver = passwd-file } passdb { args = username_format=%Ln scheme=ssha256 /usr/local/etc/vmail/passwd driver = passwd-file } plugin { acl = vfile:/etc/dovecot/dovecot-acl acl_shared_dict = file:/usr/local/etc/vmail/shared/shared-mailboxes.db fts = xapian fts_autoindex = yes fts_autoindex_exclude = \Junk fts_autoindex_exclude2 = \Trash fts_autoindex_exclude3 = \Drafts fts_autoindex_exclude4 = Junk fts_autoindex_exclude5 = Trash fts_autoindex_exclude6 = Drafts fts_autoindex_exclude7 = Sent fts_autoindex_exclude8 = Verejné.* fts_autoindex_exclude9 = Virtual.* fts_autoindex_max_recent_msgs = 99 fts_decoder = decode2text fts_enforced = yes fts_index_timeout = 90s fts_xapian = partial=2 full=20 attachments=1 verbose=0 imapsieve_mailbox1_before = file:/usr/local/etc/vmail/sieve/imap/trash-seen.sieve imapsieve_mailbox1_causes = COPY APPEND imapsieve_mailbox1_name = Trash imapsieve_mailbox2_before = file:/usr/local/etc/vmail/sieve/imap/report-spam.sieve imapsieve_mailbox2_causes = COPY imapsieve_mailbox2_name = Junk imapsieve_mailbox3_before = file:/usr/local/etc/vmail/sieve/imap/report-ham.sieve imapsieve_mailbox3_causes = COPY imapsieve_mailbox3_from = Junk imapsieve_mailbox3_name = * mail_log_cached_only = yes mail_log_events = delete undelete expunge copy mailbox_delete mailbox_rename append mail_log_fields = uid box msgid size quota = count:User quota quota_clone_dict = redis:host=127.0.0.1:port=6379:prefix=dovec/:expire_secs=2592000 quota_exceeded_message = Mailbox is full quota_grace = 50M quota_max_mail_size = 50M quota_rule = *:storage=3G quota_rule2 = Trash:storage=+50M quota_rule3 = Junk:storage=+100M quota_rule4 = Sent:storage=+100M quota_vsizes = true sieve = file:~/sieve;active=~/.dovecot.sieve sieve_before = /usr/local/etc/vmail/sieve/before.d/spam-move.sieve sieve_global_extensions = +vnd.dovecot.filter +vnd.dovecot.execute sieve_implicit_extensions = +vnd.dovecot.report sieve_max_redirects = 0 sieve_plugins = sieve_imapsieve sieve_extprograms } protocols = " imap lmtp sieve pop3" quota_full_tempfail = yes service anvil { unix_listener anvil { group = $default_internal_group mode = 0660 } } service auth { unix_listener auth-client { mode = 0666 } } service decode2text { executable = script /usr/lib/dovecot/decode2text.sh unix_listener decode2text { group = vmail mode = 0660 } user = vmail } service imap-login { inet_listener imap { address = 127.0.0.1 ::1 } process_min_avail = 2 service_count = 100 unix_listener imap { group = www-data mode = 0660 } } service indexer-worker { vsz_limit = 2 G } service lmtp { executable = lmtp -L inet_listener lmtp { address = 127.0.0.1 ::1 port = 24 } unix_listener lmtp { group = Debian-exim mode = 0660 } user = vmail } service managesieve-login { service_count = 100 vsz_limit = 64 M } service managesieve { process_limit = 256 } service pop3-login { inet_listener pop3 { port = 0 } service_count = 100 } service quota-status { client_limit = 1 executable = quota-status -p postfix unix_listener quota-status { group = Debian-exim mode = 0660 } } service stats { unix_listener stats-reader { group = $default_internal_group mode = 0660 } } ssl_cert = </etc/letsencrypt/live/slavino.sk/fullchain.pem ssl_cipher_list = HIGH:!kRSA:!SRP:!PSK:!DH:!eNULL:!aNULL:!SHA1:!CAMELLIA:+AESGCM:+AES256:+SHA256:+SHA384:+AES128:+AES256 ssl_client_ca_dir = /etc/ssl/certs ssl_key = # hidden, use -P to show it ssl_min_protocol = TLSv1.2 ssl_prefer_server_ciphers = yes submission_host = 127.0.0.1:25 userdb { args = username_format=%Ln /usr/local/etc/vmail/passwd default_fields = uid=vmail gid=vmail driver = passwd-file } verbose_proctitle = yes protocol lmtp { info_log_path = /var/log/dovecot/lmtp.log log_path = /var/log/dovecot/lmtp-errors.log mail_plugins = " acl fts fts_xapian notify quota virtual quota_clone push_notification sieve" } protocol imap { imap_metadata = yes mail_plugins = " acl fts fts_xapian notify quota virtual quota_clone imap_quota imap_sieve imap_acl" namespace inbox { location = mailbox Drafts { autoexpunge = 4 weeks } mailbox Junk { autoexpunge = 2 weeks } mailbox Sent { autoexpunge = 60 days } mailbox Trash { autoexpunge = 4 weeks autoexpunge_max_mails = 1000 } prefix = } } protocol sieve { managesieve_implementation_string = Dovecot Pigeonhole } protocol pop3 { mail_plugins = " acl fts fts_xapian notify quota virtual quota_clone" } local_name servac.slavino.org { ssl_cert = </etc/letsencrypt/live/slavino.org/fullchain.pem ssl_key = # hidden, use -P to show it } local_name servac.skk { ssl_cert = </etc/dovecot/private/servac.pem ssl_key = # hidden, use -P to show it } --------------------------------------------------------- If you need something more, be free to contact me... regards -- Slavko https://www.slavino.sk

2 1

What is the current state of High Availability Dovecot ?
by White, Daniel E. (GSFC-770.0)[NICS] 10 Apr '22

10 Apr '22

… without going to too much fuss ? Searching the Internet produces a lot of old results and many overly complicated results. My only complication is that I am using PostfixAdmin for mailbox management, and all the mailboxes are virtual. Thanks.

2 1