April 2022 - dovecot - dovecot.org

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.

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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?

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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?

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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.

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Dovecot and OAuth2 and gmail
by Steve Litt 13 Apr '22

13 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

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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

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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

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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

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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.

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