August 2021 - dovecot

Creating/Learning about services
by Dan Conway 25 Aug '21

25 Aug '21

Hello, I'm currently researching how services work within Dovecot and what scope these services are capable of. For example, I created a service as such: service myservice { executable = /home/me/executable type = worker unix_listener myservice { mode = 0666 } } When data is provided to the myservice unix socket, Dovecot appears to create a new process by executing "/home/me/executable". I found out about "status updates" through examining the logs. At first I received this: master: Error: service(myservice): Initial status notification not received in 30 seconds, killing the process What is this status notification? I found out that writing to file descriptor 5 from the executable does seem to be valid. When I write out 12 bytes I don't get an error, but when I write out 13 bytes I get the following: master: Error: service(dmon): service sent partial status update (13 bytes) What I've also noticed is that exiting 0 will cause Dovecot to spawn the process again, in what appears to be infinitely. Are there any resources/documentation that I could reference to learn more about how services work on a lower level besides just looking at the source code? Thanks.

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What kind of search response time are you setting with solr full text search?
by Steve Dondley 25 Aug '21

25 Aug '21

MY SETUP: I have apache solr full text search enabled with dovecot. I have an inbox with about 40 subfolders. I'm using the roundcube web-based mail client. The find command is showing 15823 email files and apache solr reports the same number. I'm running a dedicated mail server with a 1 GB of ram. The solr machine is running on a separate machine with 4 GB ram. THE PROBLEM: When I do a full text search through all my inbox and all subfolders on a single word, search results are returned in about 10 to 15 seconds. This is better than the 40 seconds or so I'm getting when I turn off the fts and fts_solr plugins but still a little disappointing. WHAT I'D LIKE: Now, I don't expect instant search results like gmail, but getting the search results to display in less than 5 seconds would be a lot less painful that 10 to 15 seconds. WHAT I'VE TRIED: I have reindexed the emails on solr to try to speed things upit up. ANY ADVICE? Curious to know what response times others are seeing and if there is anything else I might try to speed things up. Maybe the number of subfolders is slowing things down?

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JMAP Support Status
by David Klingenberg 25 Aug '21

25 Aug '21

Hello, what is the current status of JMAP support in Dovecot? Is it already supported or is there any ongoing work on it? I have found some older threads mentioning it as planned, but they are quite old and I haven't found anything new on that topic. Best Regards, David

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Mail duplication on multimaster replication
by Alexey 24 Aug '21

24 Aug '21

Hello. I have 3 machines with dovecot with a circular replication: 1 → 2 → 3 → 1. As I notice there is two anomalies: 1) Mass expunge often not replicated with fast replication (default replicator mode). Replication happens only after incremental replication (full of course too, but it is not necessary). I mean, that after mail was expunged on first server via imap, I can get it with doveadm fetch on second. 2) There is some odd lines in log: doveadm(mail(a)domain.org)<10620><...>: Info: copy from INBOX: box=INBOX, uid=137704, msgid=<...>, size=2877 doveadm(mail(a)domain.org)<10620><...>: Info: expunge: box=INBOX, uid=134812, msgid=<...>, size=2877 What is the copy from INBOX to INBOX. I guess that after this actions of replicator I got a ton of duplicates of removed to Trash mails. Only IMAP is in use. All 3 servers use the same version: # dovecot --version 2.3.15 (0503334ab1) doveconf -n # 2.3.15 (0503334ab1): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.15 (e6a84e31) # OS: Linux 5.10.0-0.bpo.3-amd64 x86_64 Debian 10.10 auth_verbose = yes default_vsz_limit = 30 G doveadm_password = # hidden, use -P to show it doveadm_port = 4545 first_valid_gid = 500 imap_client_workarounds = delay-newmail tb-extra-mailbox-sep tb-lsub-flags last_valid_gid = 500 last_valid_uid = 500 log_path = /var/log/dovecot/dovecot.log mail_attribute_dict = file:%h/dovecot-attributes mail_gid = dmail mail_location = mdbox:~/mdbox mail_log_prefix = "%s(%u): " mail_plugins = " mail_log notify notify replication" mail_uid = dmail managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date index ihave duplicate mime foreverypart extracttext namespace inbox { inbox = yes location = mailbox Drafts { special_use = \Drafts } mailbox Junk { special_use = \Junk } mailbox Sent { special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Trash { special_use = \Trash } prefix = } passdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } plugin { fts = xapian fts_autoindex = yes fts_autoindex_exclude = \Trash fts_decoder = decode2text fts_enforced = yes fts_xapian = partial=3 full=20 verbose=1 attachments=0 mail_log_events = delete undelete expunge copy mailbox_delete mailbox_rename mail_log_fields = uid box msgid size mail_replica = tcp:10.1.1.137:4545 plugin = fts fts_xapian replication_max_conns = 100 sieve_before = /var/lib/dovecot/sieve.d/vmail/ sieve_dir = ~/sieve sieve_global_extensions = +vnd.dovecot.duplicate sieve_trace_debug = no sieve_trace_level = actions } protocols = " imap lmtp sieve sieve" service aggregator { fifo_listener replication-notify-fifo { group = dmail user = dmail } unix_listener replication-notify { group = dmail user = dmail } } service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0666 user = postfix } unix_listener auth-userdb { group = dmail mode = 0600 user = dmail } } service decode2text { executable = script /usr/lib/dovecot/decode2text.sh unix_listener decode2text { mode = 0666 } user = dovecot } service doveadm { inet_listener { port = 4545 } } service imap-login { inet_listener imaps { port = 993 ssl = yes } } service indexer-worker { vsz_limit = 15 G } service lmtp { unix_listener /var/spool/postfix/private/dovecot-lmtp { group = postfix mode = 0600 user = postfix } } service managesieve-login { inet_listener sieve { port = 4190 } } service replicator { process_min_avail = 1 unix_listener replicator-doveadm { group = dmail mode = 0660 user = dmail } } service stats { unix_listener stats-reader { group = dmail mode = 0660 user = dmail } unix_listener stats-writer { group = dmail mode = 0660 user = dmail } } ssl = required ssl_cert = # hidden, use -^^ to show it ssl_cipher_list = ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384 ssl_dh = # hidden, use -P to show it ssl_key = # hidden, use -P to show it userdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } protocol lmtp { mail_plugins = " mail_log notify notify replication sieve" } protocol lda { mail_plugins = " mail_log notify notify replication sieve" } protocol imap { mail_plugins = " mail_log notify notify replication fts fts_xapian" }

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Problem deleting a parent folder with child folder(s)
by David Härdeman 24 Aug '21

24 Aug '21

Hi, I'm seeing some odd behavior wrt deleting a parent folder which has child/inferior folders: root@vmtest2:~# telnet localhost 143 Trying ::1... Connected to localhost. Escape character is '^]'. * OK [CAPABILITY IMAP4rev1 SASL-IR LOGIN-REFERRALS ID ENABLE IDLE LITERAL+ STARTTLS AUTH=PLAIN AUTH=LOGIN] Dovecot (Debian) ready. 1 LOGIN "test(a)example.com" "foobar" 1 OK [CAPABILITY IMAP4rev1 SASL-IR LOGIN-REFERRALS ID ENABLE IDLE SORT SORT=DISPLAY THREAD=REFERENCES THREAD=REFS THREAD=ORDEREDSUBJECT MULTIAPPEND URL-PARTIAL CATENATE UNSELECT CHILDREN NAMESPACE UIDPLUS LIST-EXTENDED I18NLEVEL=1 CONDSTORE QRESYNC ESEARCH ESORT SEARCHRES WITHIN CONTEXT=SEARCH LIST-STATUS BINARY MOVE SNIPPET=FUZZY PREVIEW=FUZZY STATUS=SIZE SAVEDATE LITERAL+ NOTIFY SPECIAL-USE QUOTA] Logged in 2 LIST "" "*" * LIST (\HasNoChildren \UnMarked \Trash) "." INBOX.Trash * LIST (\HasNoChildren \UnMarked \Sent) "." INBOX.Sent * LIST (\HasNoChildren \UnMarked \Junk) "." INBOX.Spam * LIST (\HasNoChildren \UnMarked \Archive) "." INBOX.Read * LIST (\HasNoChildren \UnMarked \Drafts) "." INBOX.Drafts * LIST (\HasChildren) "." INBOX 2 OK List completed (0.002 + 0.000 + 0.001 secs). 3 CREATE ParentA.ChildA 3 OK Create completed (0.017 + 0.000 + 0.017 secs). 4 LIST "" "*" * LIST (\Noselect \HasChildren) "." ParentA * LIST (\HasNoChildren) "." ParentA.ChildA * LIST (\HasNoChildren \UnMarked \Trash) "." INBOX.Trash * LIST (\HasNoChildren \UnMarked \Sent) "." INBOX.Sent * LIST (\HasNoChildren \UnMarked \Junk) "." INBOX.Spam * LIST (\HasNoChildren \UnMarked \Archive) "." INBOX.Read * LIST (\HasNoChildren \UnMarked \Drafts) "." INBOX.Drafts * LIST (\HasChildren) "." INBOX 4 OK List completed (0.001 + 0.000 secs). 5 EXAMINE ParentA 5 NO Mailbox doesn't exist: ParentA (0.001 + 0.000 secs). 6 DELETE ParentA.ChildA 6 OK Delete completed (0.022 + 0.000 + 0.021 secs). 7 CREATE ParentB 7 OK Create completed (0.019 + 0.000 + 0.018 secs). 8 CREATE ParentB.ChildB 8 OK Create completed (0.009 + 0.000 + 0.008 secs). 9 LIST "" "*" * LIST (\HasChildren) "." ParentB * LIST (\HasNoChildren) "." ParentB.ChildB * LIST (\HasNoChildren \UnMarked \Trash) "." INBOX.Trash * LIST (\HasNoChildren \UnMarked \Sent) "." INBOX.Sent * LIST (\HasNoChildren \UnMarked \Junk) "." INBOX.Spam * LIST (\HasNoChildren \UnMarked \Archive) "." INBOX.Read * LIST (\HasNoChildren \UnMarked \Drafts) "." INBOX.Drafts * LIST (\HasChildren) "." INBOX 9 OK List completed (0.001 + 0.000 secs). 10 DELETE ParentB 10 OK Delete completed (0.015 + 0.000 + 0.014 secs). 11 LIST "" "*" * LIST (\HasChildren) "." ParentB * LIST (\HasNoChildren) "." ParentB.ChildB * LIST (\HasNoChildren \UnMarked \Trash) "." INBOX.Trash * LIST (\HasNoChildren \UnMarked \Sent) "." INBOX.Sent * LIST (\HasNoChildren \UnMarked \Junk) "." INBOX.Spam * LIST (\HasNoChildren \UnMarked \Archive) "." INBOX.Read * LIST (\HasNoChildren \UnMarked \Drafts) "." INBOX.Drafts * LIST (\HasChildren) "." INBOX 11 OK List completed (0.001 + 0.000 secs). 12 EXAMINE ParentB 12 NO Mailbox doesn't exist: ParentB (0.001 + 0.000 secs). I would have expected the output from the "11 LIST..." command to be identical to that of the "4 LIST..." command, i.e. that "ParentB" would be listed as "\Noselect" in the response to "11 LIST...". I've tracked the contents of the local /var/vmail/.../Maildir folder while executing the above commands, and it appears to correspond to the expected situation (i.e. ".ParentA.ChildA" is created, then deleted, then ".ParentB" is created, then ".ParentB.ChildB" is created, and finally ".ParentB" is deleted - in other words, neither the ".ParentA" nor the ".ParentB" folders exist at the time when I issue the "4 LIST..." and "11 LIST..." commands). That "ParentB" should have a "\Noselect" flag in the last "LIST" also appears to be what's mandated by RFC3501, section 6.3.4: ... The DELETE command MUST NOT remove inferior hierarchical names. For example, if a mailbox "foo" has an inferior "foo.bar" (assuming "." is the hierarchy delimiter character), removing "foo" MUST NOT remove "foo.bar". It is an error to attempt to delete a name that has inferior hierarchical names and also has the \Noselect mailbox name attribute (see the description of the LIST response for more details). It is permitted to delete a name that has inferior hierarchical names and does not have the \Noselect mailbox name attribute. In this case, all messages in that mailbox are removed, and the name will acquire the \Noselect mailbox name attribute. ... Tested using the default dovecot package in Debian Bullseye, which is version 1:2.3.13+dfsg1-2. The file system is ext4, and Dovecot is running in a virtual (systemd-nspawn) machine for testing purposes. I've tried grepping through the git changelogs and sources, but I couldn't find anything which would appear to be relevant post-2.3.13. Any ideas? (Please CC me on replies, not subscribed) doveconf -n output ================== # 2.3.13 (89f716dc2): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.13 (cdd19fe3) # OS: Linux 5.10.0-8-amd64 x86_64 Debian 11.0 # Hostname: localhost auth_default_realm = example.com auth_mechanisms = plain login doveadm_password = # hidden, use -P to show it doveadm_port = 12345 mail_gid = vmail mail_home = /var/vmail/%d/%n mail_location = maildir:~/Maildir mail_privileged_group = vmail mail_uid = vmail managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date index ihave duplicate mime foreverypart extracttext imapsieve vnd.dovecot.imapsieve namespace inbox { inbox = yes location = mailbox INBOX.Drafts { auto = subscribe special_use = \Drafts } mailbox INBOX.Read { auto = subscribe special_use = \Archive } mailbox INBOX.Sent { auto = subscribe special_use = \Sent } mailbox INBOX.Spam { auto = subscribe special_use = \Junk } mailbox INBOX.Trash { auto = subscribe special_use = \Trash } prefix = } passdb { args = /etc/dovecot/dovecot.deny deny = yes driver = passwd-file } passdb { args = /etc/dovecot/dovecot-ldap-passdb.conf driver = ldap } plugin { imapsieve_mailbox1_before = file:/var/vmail/sieve/global/learn-spam.sieve imapsieve_mailbox1_causes = COPY imapsieve_mailbox1_name = INBOX.Spam imapsieve_mailbox2_before = file:/var/vmail/sieve/global/learn-ham.sieve imapsieve_mailbox2_causes = COPY imapsieve_mailbox2_from = INBOX.Spam imapsieve_mailbox2_name = * quota = maildir:User quota sieve = file:~/sieve;active=~/.dovecot.sieve sieve_before = /var/vmail/sieve/global/spam-global.sieve sieve_global_extensions = +vnd.dovecot.pipe sieve_pipe_bin_dir = /usr/bin sieve_plugins = sieve_imapsieve sieve_extprograms } protocols = imap lmtp sieve service aggregator { fifo_listener replication-notify-fifo { user = vmail } unix_listener replication-notify { user = vmail } } service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0660 user = postfix } unix_listener auth-userdb { group = vmail mode = 0660 user = vmail } } service doveadm { inet_listener doveadm { port = 12345 ssl = yes } } service imap-login { inet_listener imap { address = 127.0.0.1, [::1] port = 143 } inet_listener imaps { port = 993 } } service lmtp { unix_listener /var/spool/postfix/private/dovecot-lmtp { group = postfix mode = 0660 user = postfix } user = vmail } service managesieve-login { inet_listener sieve { port = 4190 } } service replicator { process_min_avail = 1 unix_listener replicator-doveadm { mode = 0600 user = vmail } } ssl = required ssl_cert = </etc/pki/realms/domain/default.crt 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 { args = /etc/dovecot/dovecot-ldap-userdb.conf driver = ldap } protocol imap { mail_plugins = " notify replication quota imap_sieve imap_quota" } protocol lmtp { mail_plugins = " notify replication quota sieve" postmaster_address = postmaster(a)example.com }

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Different userdb per inet_listener
by Miloslav Hůla 24 Aug '21

24 Aug '21

Hello, we are running Dovecot (2.3.4.1-5+deb10u6) with PostgreSQL passdb and userdb and for remote Postfix: auth_mechanisms = plain login inet_listener { address = 127.0.0.1 port = 12345 } It works perfectly. Now we would like to disable authentication for Postfix (SMTP), but allow it for Dovecot (IMAP & POP3). Something like "receive-only". Is there any way we can configure different passdb for mentioned inet_listener? Or is there any variable with "auth requetor name" we can use in SQL query to differentiate the result? Regards Miloslav

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Director vs Proxy
by MRob 24 Aug '21

24 Aug '21

Hello, I understand director is like coordinated state database for the proxies. Is it like a special lookup resource for Dovecot proxy? If correct, makes sense proxies and directors should be deployed in pairs. But few places the docs talk about maybe different number of directors v. proxies or putting directors on different hardware from proxies. What is reason to separate director and proxy? Thank you.

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Problems with anvil-auth-penalty and login_trusted_networks
by Ricardo Machini Barbosa 20 Aug '21

20 Aug '21

Hello, On my environment I have: 1 cluster of webmail servers 1 cluster of dovecot proxy dovecot servers n dovecot backend servers On my dovecot backend servers, I use the login_trusted_networks option with the IP range of my servers in the dovecot proxy cluster. But and I'm having problems where the IP addresses of the webmail cluster servers are receiving anvil-auth-penalty penalty. I tried to use in the login_trusted_networks option both the IP range of the dovecot proxy cluster and IP range of the webmail cluster, but this configuration had no effect and I still have my webmail IP's blocked. Is there anything I can do in this scenario to have the webmail cluster IP's whitelisted in anvil-auth-penalty ? Regards, Ricardo

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handling public namespace (under mdbox/sdbox)
by Michal Soltys 20 Aug '21

20 Aug '21

Besides of course a "dummy" user that has admin rights to all subfloders - and handles delivery via Public/ prefix. For example using: public-dummy+Public/path/to/subfloder. But - with maildir I've been using a dedicated user that sees public namespace as its own mailbox - so all the alises/redirects go w/o Public/ prefix in such case - for example: public-dedicated+path/to/subfloder . This has been working fine with old maildir, but will this be ok for dbox mailboxes as well ?

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dovecot flags lost after move/copy
by ciuga 20 Aug '21

20 Aug '21

Dear Community, I have a issue with our dovecot server ( 2.3.4.1 (f79e8e7e4) ) with maildir Flags are lost after a copy (or move), as you can see on this exemple : * Before doing anything, list detail of a mail : doveadm fetch -u XXX flags mailbox-guid f303160f6df58c5b67040200bc34b0e6 uid 46126 flags: \Seen $Labelimportant File name also contents the 'e' at the end : 1628631415.M671664P17659.mail7,S=14835,W=15111:2,Se * Copy it for testing doveadm copy -u XXX Archive mailbox INBOX mailbox-guid f303160f6df58c5b67040200bc34b0e6 uid 46126 * Fetch flag of this new mail doveadm -v fetch -u XXX flags mailbox Archive flags: \Seen File name also don't content the flags -rw------- 2 XXX users 14835 août 10 23:36 '1628631415.M671664P17659.mail7,S=14835,W=15111:2,S' Do you known how to keep flags after move and/or copy ? Thanks in advance -- Chris

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