June 2017 - dovecot - dovecot.org

Multiuser attachment storage (mail_attachment_dir)
by megaone＠yandex.ru 06 Jun '17

06 Jun '17

Was trying to set up attachment storage, but folders are receiving permission only for current user, so if another user is receiving a mail with same attachment he is getting permission denied error on reading hash file. Is it possible to setup global attachment storage to work with all users, at least in domain? mail_access_groups won't help, as folders are given 0 group permission. Umask and setfacl won't help either.

2 1

Two domains - same user names filter
by Sandbox 06 Jun '17

06 Jun '17

Hi, I have two LDAP domains, which has some equal users, eg: abc(a)domain1.com abc(a)domain2.com I sat up this config: domain1 users maildirs are stored in /home/vmail/username domain2 users maildirs are stored in /home/vmail/domain2/username This works fine except one thing: i cant set up the ldap query to choose the correct maildir if the user names are equal. Is it possible to use a user_filter which will choose the correct maildir and user/domain from the email address? My current ldap.conf for domain1: hosts = ldap.domain1.com base = ou=People,dc=domain1,dc=com ldap_version = 3 user_attrs = uid=user user_filter = (uid=%n) pass_attrs = uid=user,userPassword=password pass_filter = (uid=%n) default_pass_scheme = MD5 and for domain2: hosts = ldap.domain2.com base = ou=People,dc=domain2,dc=com ldap_version = 3 user_attrs = \ =mail=maildir:/home/vmail/%{ldap:departmentNumber)/%n/Maildir user_filter = (uid=%n) pass_attrs = uid=%n,userPassword=password pass_filter = (uid=%n) default_pass_scheme = MD5 Thanks, Robert

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vnd.dovecot.pipe in sieve: what user....
by Larry Rosenman 06 Jun '17

06 Jun '17

I have a site-wide bayes database, that currently gets populated by scripts running as a user that is also the user that Exim uses to call spamd. When a script is running from the vnd.dovecot.pipe call, what user is it running as? Would a setuid script work? -- Larry Rosenman http://www.lerctr.org/~ler Phone: +1 214-642-9640 E-Mail: larryrtx(a)gmail.com US Mail: 17716 Limpia Crk, Round Rock, TX 78664-7281

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Re: corrupted indexes rebuilding over and over
by Joseph Tam 05 Jun '17

05 Jun '17

micah <micah(a)riseup.net> wrote: > Now, about 50 users have a problem where their indexes are > corrupted. Dovecot tries to fix them, but for some reason it is > failing. The users are seeing their mails duplicated and they cannot > delete mails. I can see in the logs dovecot detecting this and trying to > rebuild operations during delivery and imap login, but its repeating > over and over and over. For one user, I've seen more than 4k lines in > the logs about this. > > If i try to do doveadm force-resync -u username INBOX > > I get this: > > doveadm(nuffsaid): Warning: mdbox /n/nuffsaid/mdbox/storage: Inconsistency in map index (3494,32332 != 3494,383536) I think mdbox is sensitive to index corruption. mbox/maildir indices can be rebuilt, but data loss can result if mdbox indices are corrupted: https://wiki2.dovecot.org/MailboxFormat/dbox "Grubert, Gordon" <gordon.grubert+lists(a)uni-greifswald.de> then writes: > we had the same problem after a system failure. Our problem could be > solved by > > rm /PATH/USER/mdbox/storage/dovecot.map.index* > doveadm -D -v force-resync -u USER INBOX Not sure given the above URL whether this will solve your problem of make it far worse. Better back up what you have before trying anything. Joseph Tam <jtam.home(a)gmail.com>

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corrupted indexes rebuilding over and over
by micah 05 Jun '17

05 Jun '17

Hi, On saturday one of our dovecot machines had an OOPS, and we had to powercycle it. When it came up, it did a filesystem fsck (ext4) and fixed a couple things, but nothing in lost+found. Now, about 50 users have a problem where their indexes are corrupted. Dovecot tries to fix them, but for some reason it is failing. The users are seeing their mails duplicated and they cannot delete mails. I can see in the logs dovecot detecting this and trying to rebuild operations during delivery and imap login, but its repeating over and over and over. For one user, I've seen more than 4k lines in the logs about this. If i try to do doveadm force-resync -u username INBOX I get this: doveadm(nuffsaid): Warning: mdbox /n/nuffsaid/mdbox/storage: Inconsistency in map index (3494,32332 != 3494,383536) doveadm(nuffsaid): Warning: fscking index file /srv/dovecot_indexes/n/nuffsaid/storage/dovecot.map.index doveadm(nuffsaid): Warning: mdbox /n/nuffsaid/mdbox/storage: rebuilding indexes doveadm(nuffsaid): Warning: fscking index file /srv/dovecot_indexes/n/nuffsaid/storage/dovecot.map.index doveadm(nuffsaid): Warning: mdbox /n/nuffsaid/mdbox/storage: Inconsistency in map index (3494,32332 != 3494,384024) doveadm(nuffsaid): Warning: fscking index file /srv/dovecot_indexes/n/nuffsaid/storage/dovecot.map.index but then if i do it again, I get the same thing, over and over and over (the numbers change a little). This is dovecot 2.2.27 with mdbox format.... what can I do to fix this? Its driving users mad, and they keep going over quota as their space fills. thanks! micah

2 2

fts_solr: uid0?
by Larry Rosenman 05 Jun '17

05 Jun '17

I'm seeing the following: Jun 5 11:10:52 thebighonker dovecot: imap(ler): Error: fts_solr: received invalid uid '0' Is there something I can get for you to debug? doveconf -n: # 2.2.30.1 (eebd877): /usr/local/etc/dovecot/dovecot.conf # Pigeonhole version 0.4.18 (29cc74d) # OS: FreeBSD 11.1-PRERELEASE amd64 auth_debug_passwords = yes auth_default_realm = lerctr.org auth_mechanisms = plain login auth_realms = lerctr.org thebighonker.lerctr.org tbh.lerctr.org auth_username_format = %Ln default_vsz_limit = 1 G deliver_log_format = msgid=%m: %$ (subject=%s from=%f size=%w) lda_mailbox_autocreate = yes listen = 192.147.25.65, :: lmtp_save_to_detail_mailbox = yes login_access_sockets = tcpwrap mail_attribute_dict = file:%h/mail/.imap/dovecot-mail-attributes mail_debug = yes mail_location = mbox:~/mail:INBOX=~/mail/INBOX mail_plugins = " fts fts_solr notify stats virtual" mail_privileged_group = mail mail_server_admin = mailto:ler@lerctr.org mail_server_comment = LERCTR Mail Server mailbox_list_index = yes managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date index ihave duplicate mime foreverypart extracttext vacation-seconds editheader mboxmetadata servermetadata imapsieve vnd.dovecot.imapsieve namespace archive { hidden = no list = no location = mbox:~/MAIL-ARCHIVE prefix = ARCHIVE/ separator = / } namespace inbox { inbox = yes location = mailbox Drafts { special_use = \Drafts } mailbox INBOX { auto = create } mailbox Junk { special_use = \Junk } mailbox SA/FN { special_use = \Junk } mailbox SENT { special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Trash { special_use = \Trash } mailbox virtual/Flagged { special_use = \Flagged } mailbox virtual/all { special_use = \All } prefix = } namespace virtual { hidden = no list = yes location = virtual:~/MAIL-VIRTUAL:INDEX=MEMORY prefix = Virtual/ separator = / } passdb { args = failure_show_msg=yes session=yes max_requests=20 driver = pam } plugin { fts = solr fts_autoindex = yes fts_solr = url=http://thebighonker.lerctr.org:8983/solr/dovecot/ fts_tika = http://localhost:9998/tika/ imapsieve_url = sieve://thebighonker.lerctr.org mail_log_events = delete undelete expunge copy mailbox_delete mailbox_rename flag_change append mail_log_fields = uid box msgid size from subject vsize flags recipient_delimiter = + sieve = ~/.dovecot.sieve sieve_dir = ~/sieve sieve_extensions = +editheader +vacation-seconds +mboxmetadata +servermetadata sieve_plugins = sieve_imapsieve stats_command_min_time = 1 mins stats_domain_min_time = 12 hours stats_ip_min_time = 12 hours stats_memory_limit = 16 M stats_refresh = 5s stats_session_min_time = 15 mins stats_track_cmds = yes stats_user_min_time = 1 hours } protocols = imap pop3 lmtp sieve service auth { unix_listener auth-client { mode = 0666 } unix_listener auth-master { mode = 0666 } } service indexer-worker { drop_priv_before_exec = yes } service managesieve-login { inet_listener sieve { port = 4190 } inet_listener sieve_deprecated { port = 2000 } } service stats { chroot = empty client_limit = 0 drop_priv_before_exec = no executable = stats extra_groups = fifo_listener stats-mail { group = mode = 0666 user = } fifo_listener stats-user { group = mode = 0666 user = } group = idle_kill = 4294967295 secs privileged_group = process_limit = 1 process_min_avail = 0 protocol = service_count = 0 type = unix_listener stats { group = mode = 0666 user = } user = $default_internal_user vsz_limit = 18446744073709551615 B } service tcpwrap { unix_listener login/tcpwrap { group = $default_login_user mode = 0600 user = $default_login_user } } ssl_cert = </home/ler/letsencrypt-home/lerctr.org/fullchain.cer ssl_cipher_list = EECDH+ECDSA+AESGCM:EECDH+aRSA+AESGCM:EECDH+ECDSA+SHA384:EECDH+ECDSA+SHA256:EECDH+aRSA+SHA384:EECDH+aRSA+SHA256:EECDH+AESGCM:EECDH:EDH+AESGCM:EDH+aRSA:HIGH:!MEDIUM:!LOW:!aNULL:!eNULL:!LOW:!RC4:!MD5:!EXP:!PSK:!SRP:!DSS ssl_key = # hidden, use -P to show it ssl_protocols = !SSLv2 !SSLv3 userdb { driver = passwd } verbose_proctitle = yes protocol lmtp { mail_plugins = " fts fts_solr notify stats virtual sieve mail_log" } protocol lda { mail_plugins = " fts fts_solr notify stats virtual sieve mail_log" } protocol pop3 { mail_plugins = " fts fts_solr notify stats virtual mail_log" } protocol !doveadm { mail_plugins = " fts fts_solr notify stats virtual mail_log" } protocol imap { imap_client_workarounds = tb-extra-mailbox-sep tb-lsub-flags imap_logout_format = in=%i out=%o fhc=%{fetch_hdr_count} fhb=%{fetch_hdr_bytes} fbc=%{fetch_body_count} fbb=%{fetch_body_bytes} del=%{deleted} exp=%{expunged} trash=%{trashed} imap_metadata = yes mail_max_userip_connections = 50 mail_plugins = " fts fts_solr notify stats virtual mail_log imap_sieve imap_stats stats" } -- Larry Rosenman http://www.lerctr.org/~ler Phone: +1 214-642-9640 E-Mail: larryrtx(a)gmail.com US Mail: 17716 Limpia Crk, Round Rock, TX 78664-7281

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SIG11/Auth/FreeBSD
by Larry Rosenman 05 Jun '17

05 Jun '17

I'm seeing lots of: Jun 2 00:00:05 thebighonker exim[57437]: dovecot_login authenticator failed for ec2-52-40-16-7.us-west-2.compute.amazonaws.com (ADM IN) [52.40.16.7]:51339 I=[192.147.25.65]:465: 535 Incorrect authentication data (set_id=web) Jun 2 00:00:06 thebighonker exim[57439]: dovecot_login authenticator failed for ec2-52-40-16-7.us-west-2.compute.amazonaws.com (ADM IN) [52.40.16.7]:51363 I=[192.147.25.65]:465: 535 Incorrect authentication data (set_id=web) Jun 2 00:00:06 thebighonker exim[57438]: dovecot_login authenticator failed for ec2-52-40-16-7.us-west-2.compute.amazonaws.com (ADM IN) [52.40.16.7]:51355 I=[192.147.25.65]:465: 535 Incorrect authentication data (set_id=web) Jun 2 00:00:06 thebighonker exim[57443]: dovecot_login authenticator failed for ec2-52-40-16-7.us-west-2.compute.amazonaws.com (ADM IN) [52.40.16.7]:51385 I=[192.147.25.65]:465: 435 Unable to authenticate at present: authentication socket read error or premature e of Jun 2 00:00:06 thebighonker exim[57442]: dovecot_login authenticator failed for ec2-52-40-16-7.us-west-2.compute.amazonaws.com (ADM IN) [52.40.16.7]:51368 I=[192.147.25.65]:465: 435 Unable to authenticate at present: authentication socket read error or premature e of Jun 2 00:00:06 thebighonker exim[57441]: dovecot_login authenticator failed for ec2-52-40-16-7.us-west-2.compute.amazonaws.com (ADM IN) [52.40.16.7]:51361 I=[192.147.25.65]:465: 435 Unable to authenticate at present: authentication socket read error or premature e of Jun 2 00:00:06 thebighonker exim[57440]: dovecot_login authenticator failed for ec2-52-40-16-7.us-west-2.compute.amazonaws.com (ADM IN) [52.40.16.7]:51362 I=[192.147.25.65]:465: 435 Unable to authenticate at present: authentication socket read error or premature e of Jun 2 00:00:06 thebighonker dovecot: auth: Fatal: master: service(auth): child 55916 killed with signal 11 (core not dumped - set s ervice auth { drop_priv_before_exec=yes }) The suggestion to drop_priv_before_exec=yes breaks auth totally. doveconf -n: # 2.2.30.1 (eebd877): /usr/local/etc/dovecot/dovecot.conf # Pigeonhole version 0.4.18 (29cc74d) # OS: FreeBSD 11.0-STABLE amd64 auth_default_realm = lerctr.org auth_mechanisms = plain login auth_realms = lerctr.org thebighonker.lerctr.org tbh.lerctr.org auth_username_format = %Ln default_vsz_limit = 1 G deliver_log_format = msgid=%m: %$ (subject=%s from=%f size=%w) lda_mailbox_autocreate = yes listen = 192.147.25.65, :: lmtp_save_to_detail_mailbox = yes login_access_sockets = tcpwrap mail_attribute_dict = file:%h/mail/.imap/dovecot-mail-attributes mail_debug = yes mail_location = mbox:~/mail:INBOX=~/mail/INBOX mail_plugins = " fts fts_solr notify stats virtual" mail_privileged_group = mail mail_server_admin = mailto:ler@lerctr.org mail_server_comment = LERCTR Mail Server mailbox_list_index = yes managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date index ihave duplicate mime foreverypart extracttext vacation-seconds editheader mboxmetadata servermetadata imapsieve vnd.dovecot.imapsieve namespace archive { hidden = no list = no location = mbox:~/MAIL-ARCHIVE prefix = ARCHIVE/ separator = / } namespace inbox { inbox = yes location = mailbox Drafts { special_use = \Drafts } mailbox INBOX { auto = create } mailbox Junk { special_use = \Junk } mailbox SA/FN { special_use = \Junk } mailbox SENT { special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Trash { special_use = \Trash } mailbox virtual/Flagged { special_use = \Flagged } mailbox virtual/all { special_use = \All } prefix = } namespace virtual { hidden = no list = yes location = virtual:~/MAIL-VIRTUAL:INDEX=MEMORY prefix = Virtual/ separator = / } passdb { args = failure_show_msg=yes session=yes max_requests=20 driver = pam } plugin { fts = solr fts_autoindex = yes fts_solr = url=http://thebighonker.lerctr.org:8983/solr/dovecot/ fts_tika = http://localhost:9998/tika/ imapsieve_url = sieve://thebighonker.lerctr.org mail_log_events = delete undelete expunge copy mailbox_delete mailbox_rename flag_change append mail_log_fields = uid box msgid size from subject vsize flags recipient_delimiter = + sieve = ~/.dovecot.sieve sieve_dir = ~/sieve sieve_extensions = +editheader +vacation-seconds +mboxmetadata +servermetadata sieve_plugins = sieve_imapsieve stats_command_min_time = 1 mins stats_domain_min_time = 12 hours stats_ip_min_time = 12 hours stats_memory_limit = 16 M stats_refresh = 5s stats_session_min_time = 15 mins stats_track_cmds = yes stats_user_min_time = 1 hours } protocols = imap pop3 lmtp sieve service auth { unix_listener auth-client { mode = 0666 } unix_listener auth-master { mode = 0666 } } service indexer-worker { drop_priv_before_exec = yes } service managesieve-login { inet_listener sieve { port = 4190 } inet_listener sieve_deprecated { port = 2000 } } service stats { chroot = empty client_limit = 0 drop_priv_before_exec = no executable = stats extra_groups = fifo_listener stats-mail { group = mode = 0666 user = } fifo_listener stats-user { group = mode = 0666 user = } group = idle_kill = 4294967295 secs privileged_group = process_limit = 1 process_min_avail = 0 protocol = service_count = 0 type = unix_listener stats { group = mode = 0666 user = } user = $default_internal_user vsz_limit = 18446744073709551615 B } service tcpwrap { unix_listener login/tcpwrap { group = $default_login_user mode = 0600 user = $default_login_user } } ssl_cert = </home/ler/letsencrypt-home/lerctr.org/fullchain.cer ssl_cipher_list = EECDH+ECDSA+AESGCM:EECDH+aRSA+AESGCM:EECDH+ECDSA+SHA384:EECDH+ECDSA+SHA256:EECDH+aRSA+SHA384:EECDH+aRSA+SHA256:EECDH+AESGCM:EECDH:EDH+AESGCM:EDH+aRSA:HIGH:!MEDIUM:!LOW:!aNULL:!eNULL:!LOW:!RC4:!MD5:!EXP:!PSK:!SRP:!DSS ssl_key = # hidden, use -P to show it ssl_protocols = !SSLv2 !SSLv3 userdb { driver = passwd } verbose_proctitle = yes protocol lmtp { mail_plugins = " fts fts_solr notify stats virtual sieve mail_log" } protocol lda { mail_plugins = " fts fts_solr notify stats virtual sieve mail_log" } protocol pop3 { mail_plugins = " fts fts_solr notify stats virtual mail_log" } protocol !doveadm { mail_plugins = " fts fts_solr notify stats virtual mail_log" } protocol imap { imap_client_workarounds = tb-extra-mailbox-sep tb-lsub-flags imap_logout_format = in=%i out=%o fhc=%{fetch_hdr_count} fhb=%{fetch_hdr_bytes} fbc=%{fetch_body_count} fbb=%{fetch_body_bytes} del=%{deleted} exp=%{expunged} trash=%{trashed} imap_metadata = yes mail_max_userip_connections = 50 mail_plugins = " fts fts_solr notify stats virtual mail_log imap_sieve imap_stats stats" } -- Larry Rosenman http://www.lerctr.org/~ler Phone: +1 214-642-9640 E-Mail: larryrtx(a)gmail.com US Mail: 17716 Limpia Crk, Round Rock, TX 78664-7281

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Possible RENAME bug
by Gabriele Bulfon 05 Jun '17

05 Jun '17

Hello, I'm having some trouble working on a webapp managing the imap tree on Dovecot. The same doesn't happen on other imap servers (e.g. Cyrus). Looks like if I receive shared folders from another user, and try to rename a folder in it, the rename command returns "ok", then if you list the new folder name, it isn't there. Looks like you've lost all the original folder because if you try listing the parent folder, you don't have nor the original nor the new name, even trying to logout/disconnect and reconnect/login. Luckily nothing is lost actually, if you try to create a new folder on the parent folder, and then list the parent folder, you get both the newly created one and the renamed one also appears magically! Here is the IMAP trace to reproduce: *** ON ACCOUN RECEIVING SHARED FOLDER *** PREPARE A FOLDER IN SHARED TREE WITH JUST ONE CHILD "aaaa" *** THEN RENAME aaaa FOLDER TO bbbb *** AFTER "OK Rename" FOLDER IS NOT PRESENT IN LIST A3 LIST "" Shared/gabriele.prova(a)sonicle.com/Junk/aaaa * LIST (\HasNoChildren) "/" Shared/gabriele.prova(a)sonicle.com/Junk/aaaa A3 OK List completed. A4 RENAME Shared/gabriele.prova(a)sonicle.com/Junk/aaaa Shared/gabriele.prova(a)sonicle.com/Junk/bbbb A4 OK Rename completed. A5 LIST "" Shared/gabriele.prova(a)sonicle.com/Junk/bbbb A5 OK List completed. *** bbbb IS NOT LISTED AFTER "OK Rename"! *** LOGOUT/DISCONNECT - CONNECT/LOGIN AND LIST BRANCH *** A66 LIST "" "Shared/gabriele.prova(a)sonicle.com/%" * LIST (\HasNoChildren) "/" Shared/gabriele.prova(a)sonicle.com/Sent * LIST (\HasNoChildren) "/" Shared/gabriele.prova(a)sonicle.com/Drafts * LIST (\HasNoChildren) "/" Shared/gabriele.prova(a)sonicle.com/Trash * LIST (\HasNoChildren) "/" Shared/gabriele.prova(a)sonicle.com/Spam * LIST (\HasNoChildren) "/" Shared/gabriele.prova(a)sonicle.com/Junk * LIST (\HasNoChildren) "/" Shared/gabriele.prova(a)sonicle.com/INBOX A66 OK List completed. *** Junk HAS NO CHILDREN! *** CREATE A NEW FOLDER IN Junk *** A68 CREATE Shared/gabriele.prova(a)sonicle.com/Junk/zzzz A68 OK Create completed. A69 LIST "" Shared/gabriele.prova(a)sonicle.com/Junk/zzzz * LIST (\HasNoChildren) "/" Shared/gabriele.prova(a)sonicle.com/Junk/zzzz A69 OK List completed. *** "zzzz" IS LISTED, SO NOW LIST PARENT BRANCH *** A26 LIST "" "Shared/gabriele.prova(a)sonicle.com/%" * LIST (\HasNoChildren) "/" Shared/gabriele.prova(a)sonicle.com/Sent * LIST (\HasNoChildren) "/" Shared/gabriele.prova(a)sonicle.com/Drafts * LIST (\HasNoChildren) "/" Shared/gabriele.prova(a)sonicle.com/Trash * LIST (\HasNoChildren) "/" Shared/gabriele.prova(a)sonicle.com/Spam * LIST (\HasChildren) "/" Shared/gabriele.prova(a)sonicle.com/Junk * LIST (\HasNoChildren) "/" Shared/gabriele.prova(a)sonicle.com/INBOX A26 OK List completed. *** Junk NOW HAS CHILDREN, SO NOW LIST Junk BRANCH *** A29 LIST "" "Shared/gabriele.prova(a)sonicle.com/Junk/%" * LIST (\HasNoChildren) "/" Shared/gabriele.prova(a)sonicle.com/Junk/bbbb * LIST (\HasNoChildren) "/" Shared/gabriele.prova(a)sonicle.com/Junk/zzzz A29 OK List completed. *** bbbb MAGICALLY APPEARS! NOTHING IS LOST. Is there anything I can do to force "bbbb" to reappear without having to create a new folder? Any idea? Thanks in advance, Gabriele ---------------------------------------------------------------------------------------- Sonicle S.r.l. : http://www.sonicle.com Music: http://www.gabrielebulfon.com Quantum Mechanics : http://www.cdbaby.com/cd/gabrielebulfon

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Problem with LMTP
by Angel L. Mateo 05 Jun '17

05 Jun '17

Hello, I'm having a problem with LMTP in a proxy server since I upgraded from 2.1.16 to 2.2.28. In my logs I have: Apr 26 12:54:17 musio12 dovecot: lmtp(2082): Fatal: master: service(lmtp): child 2082 killed with signal 11 (core dumped). As far as I could check the message is delivered in a later connection. I have enabled core dumped files, but how could I debug it? -- Angel L. Mateo Martínez Sección de Telemática Área de Tecnologías de la Información y las Comunicaciones Aplicadas (ATICA) http://www.um.es/atica Tfo: 868889150 Fax: 868888337

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Retrieving mail from read-only mdbox
by Mark Moseley 05 Jun '17

05 Jun '17

This is a 'has anyone run into this and solved it' post. And yes, I've been reading and re-reading TFM but without luck. The background is that I'm working on tooling before we start a mass maildir->mdbox conversion. One of those tools is recovering mail from backups (easy as pie with maildir). We've got all of our email on Netapp file servers. They have nice snapshotting but the snapshots are, of course, readonly. My question: is there a doveadm command that will allow for email to be retrieved from a readonly mdbox, either directly (like manipulating the mdbox files directly) or by doveadm talking to the dovecot processes? Ideally, there'd be something like doveadm dump, but that could dump selected message contents. I've tried using IMAP with mail_location pointed at the snapshot, but, though I can get a listing of emails in the mailbox, the fetch fails when dovecot can't write-lock dovecot.index.log. If anyone has gotten something similar to work, I'd love to hear about it. A working IMAP setup would be the ideal, since it's more easily automatible (but I'll take whatever I can get). Any and all hints are most welcome!

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