March 2023 - dovecot - dovecot.org

index locally
by tomate aceite 10 Mar '23

10 Mar '23

Thanks guys for all the help. I will check if i can do a rsync script.

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Backend doesn't support GUIDs
by Jose Celestino 09 Mar '23

09 Mar '23

Hi, Have some old dboxes where doveadm sync fails with "Backend doesn't support GUIDs, sync with header hashes instead". The error is right after reading from the folder dovecot.index.log.2. The dovecot version is 2.3.10. Any fix/workaround for the error?

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how to setup timestamp
by tomate aceite 08 Mar '23

08 Mar '23

Does anyone got any example about how to implement delay_until = timestamp ? I am not sure where i can setup it. Thanks!

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Missing mailboxes after migration from Maildir -> mdbox
by Ansgar 08 Mar '23

08 Mar '23

I migrated from existing dovecot Maildir to dbox. After adding separator to the namespace it migrated all Inbox mails, but the other mailboxes like user-created ones and "Junk", "Sent" and so on has not been migrated. Any advice would be helpful, here is my dovconf: https://pastebin.com/rDSeBcLe My migration I made using: 1. Edit dovecot.conf with new mdbox and adding separator 2. dsync mirror per user with old maildir:~/mail 3. missing mailboxes: tried with doveadm sync also with -f mode and specified mailboxes. No luck. dsync -v -u admin(a)sajdowski.de mirror maildir:~/mail mail_home = /var/vmail/mailboxes/%d/%n #mail_location = maildir:~/mail:LAYOUT=fs mail_location=mdbox:~/mdbox My directorys: root@mail:/var/vmail/mailboxes/example.de/admin# ls -l insgesamt 56 drwxrwx--- 2 vmail vmail 4096 8. Mär 01:14 cur -rw-rw---- 1 vmail vmail 160 8. Mär 01:14 dovecot.index.log -rw-rw---- 1 vmail vmail 3712 8. Mär 01:14 dovecot.list.index.log -rw-rw---- 1 vmail vmail 96 8. Mär 01:14 dovecot.mailbox.log -rw-rw---- 1 vmail vmail 51 8. Mär 01:14 dovecot-uidlist -rw-rw---- 1 vmail vmail 8 8. Mär 01:14 dovecot-uidvalidity -r--r--r-- 1 vmail vmail 0 8. Mär 00:57 dovecot-uidvalidity.6407cf6d drwxrwx--- 20 vmail vmail 4096 8. Mär 02:51 mail drwx------ 7 vmail vmail 4096 8. Mär 13:52 mailboxes drwx------ 13 vmail vmail 4096 8. Mär 02:36 Maildir drwx------ 5 vmail vmail 4096 8. Mär 04:20 mdbox drwxrwx--- 2 vmail vmail 4096 8. Mär 01:14 new -rw-rw---- 1 vmail vmail 28 8. Mär 01:14 subscriptions drwxrwx--- 2 vmail vmail 4096 8. Mär 01:14 tmp drwxrwx--- 2 vmail vmail 4096 8. Mär 00:57 xapian-indexes root@mail:/var/vmail/mailboxes/example.de/admin/mail# ls -l insgesamt 87576 drwxrwx--- 2 vmail vmail 9113600 8. Mär 02:20 cur -rw-rw---- 1 vmail vmail 1602296 8. Mär 02:20 dovecot.index -rw-rw---- 1 vmail vmail 73030876 8. Mär 02:41 dovecot.index.cache -rw-rw---- 1 vmail vmail 441656 8. Mär 02:39 dovecot.index.log -rw-rw---- 1 vmail vmail 83568 8. Mär 02:20 dovecot.index.log.2 -rwxrwx--- 1 vmail vmail 206490 17. Jun 2019 dovecot.index.thread -rwxrwx--- 1 vmail vmail 51 2. Aug 2019 dovecot-keywords -rw-rw---- 1 vmail vmail 1392 8. Mär 01:25 dovecot.list.index -rw-rw---- 1 vmail vmail 6712 8. Mär 02:41 dovecot.list.index.log -rwxrwx--- 1 vmail vmail 1464 8. Mär 02:20 dovecot.mailbox.log -rw-rw---- 1 vmail vmail 4875528 8. Mär 02:20 dovecot-uidlist -rwxrwx--- 1 vmail vmail 8 8. Mär 01:25 dovecot-uidvalidity -rwxrwx--- 1 vmail vmail 0 17. Jun 2019 dovecot-uidvalidity.5a6912f0 drwxrwx--- 5 vmail vmail 4096 7. Mär 20:14 Drafts -rw-rw---- 1 vmail vmail 49 6. Mär 11:10 maildirsize drwxrwx--- 5 vmail vmail 4096 7. Mär 20:44 'Mailling Listen' drwxrwx--- 2 vmail vmail 204800 8. Mär 00:04 new drwxrwx--- 5 vmail vmail 4096 7. Mär 20:14 Sent drwxrwx--- 5 vmail vmail 4096 7. Mär 20:44 Spam drwxrwx--- 5 vmail vmail 4096 26. Feb 19:44 'SPF Fail' -rw-rw---- 1 vmail vmail 23 8. Mär 02:20 subscriptions drwxrwx--- 2 vmail vmail 4096 8. Mär 02:20 tmp drwxrwx--- 5 vmail vmail 4096 26. Feb 19:12 Trash drwxrwx--- 5 vmail vmail 4096 7. Mär 22:30 ubb drwxrwx--- 10 vmail vmail 4096 27. Feb 18:44 xapian-indexes

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index locally
by tomate aceite 08 Mar '23

08 Mar '23

Hello, Do you know if is possible to store indexes locally instead of NFS in dovecot 2.2.7 ? Thanks.

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Dovecot "Mailbox sharing between users".
by Jobst Schmalenbach 07 Mar '23

07 Mar '23

Hi I have appended the important bits of my server configuration to the end of this email I am trying to get "Mailbox sharing between users" to work. For starters it is very hard to follow the doc only https://doc.dovecot.org/configuration_manual/shared_mailboxes/shared_mailbo… without an actual example. I tried to use this (sorry in German) https://dokuwiki.tachtler.net/doku.php?id=tachtler:dovecot_shares and this got me a little further down the track. I followed the instructions required for the dovecot config files. Restarted dovecot, not errors displayed in the logs. I have got access to two user accounts, say USER1 and USER2. I executed this lines doveadm acl set -u USER1 INBOX user=USER2 admin create delete expunge insert lookup post read write write-deleted write-seen doveadm acl set -u USER2 INBOX user=USER1 admin create delete expunge insert lookup post read write write-deleted write-seen and created (just to be sure) two folders for each user /home/USER1/Mail/shared/USER1 /home/USER1/Mail/shared/USER2 /home/USER2/Mail/shared/USER1 /home/USER2/Mail/shared/USER2 The tried to create a mailboxes like so /home/USER1/Mail/shared/USER1/testa /home/USER1/Mail/shared/USER2/testb /home/USER2/Mail/shared/USER1/testa /home/USER2/Mail/shared/USER2/testb They are not created and no error is displayed - even looking at the dovecot logs. What I see in the folders for BOTH users though (for every folder) dovecot.list.index.log On the command line I can see the .imap files and do a 'ls -alR' in the folders, but no created mbox. I can definitely see the folders, but I cannot create a mbox file. What am I doing wrong? Help please. --------------------------------------------------------------------------------------------------------------------------------------------------------------- Here are the important configuration items # 2.3.16 (7e2e900c1a): /etc/dovecot/dovecot.conf # OS: Linux 4.18.0-425.13.1.el8_7.x86_64 x86_64 AlmaLinux release 8.7 (Stone Smilodon) xfs namespace shared { list = children location = maildir:~/Mail/:INDEX=~/Mail/shared/%%u:CONTROL=~/Mail/shared/ prefix = shared/%%u/ separator = / subscriptions = yes type = shared } mail_location = mbox:/home/%u/Mail/:INBOX=/var/mail/%u mail_plugins = acl passdb { driver = pam } plugin { acl = vfile acl_shared_dict = file:/var/lib/dovecot/db/shared-mailboxes.db } service auth { unix_listener auth-userdb { group = dovecot mode = 0777 user = dovecot } } protocol imap { mail_plugins = " acl imap_acl" } --

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Flags/tags lost when moving e-mails to another folder
by Alexis Ben Miloud--Josselin 06 Mar '23

06 Mar '23

Hi, I have an issue with e-mail tags/flags. The IMAP user is using Thunderbird or Roundcube with Thunderbird tags. When the user (with an IMAP client) moves an e-mail from a folder to another, tags set on the e-mail are lost. When we check the filesystem, we can see the "a" tag: -rw-rw---- 2 test mailusers 2498 Dec 29 15:31 'cur/1676643827.M563793P15241.<HOSTNAME>,S=2498,W=2551:2,a' When we move the e-mail to another folder, the tag disappear: -rw-rw---- 2 test mailusers 2498 Dec 29 15:31 '.test/cur/1676644340.M214404P22014.<HOSTNAME>,S=2498,W=2551:2,' In both folders, the dovecot-keywords file is: 0 $LABEL1 The problem appeared after a major system upgrade (Debian 9 to 10). Dovecot version went from 2.2.27 to 2.3.4.1. Some system informations: # dovecot --version 2.3.4.1 (f79e8e7e4) # cat /etc/debian_version 10.13 # uname -a Linux <HOSTNAME> 4.19.0-23-amd64 #1 SMP Debian 4.19.269-1 (2022-12-20) x86_64 GNU/Linux # findmnt /var TARGET SOURCE FSTYPE OPTIONS /var /dev/vda3 ext4 rw,nosuid,relatime # findmnt /home TARGET SOURCE FSTYPE OPTIONS /home /dev/vdb ext4 rw,nosuid,nodev,noexec,relatime The output of `dovecot -n output` is here (link expires in one year): https://paste.evolix.org/?96d46acaea638568#56g7AQLuzJxxy4xintpexJCPgiAAG23c… Here are the operations I see on an e-mail file using strace: 15507 link("/home/test/Maildir/cur/1672326270.M619318P11927.<HOSTNAME>,S=2498,W=2551:2,Sa", "/home/test/Maildir/.test/tmp/1672326456.M737812P15507.<HOSTNAME>") = 0 15507 rename("/home/test/Maildir/.test/tmp/1672326456.M737812P15507.<HOSTNAME>", "/home/test/Maildir/.test/cur/1672326456.M737813P15507.<HOSTNAME>,S=2498,W=2551:2,S") = 0 15507 unlink("/home/test/Maildir/cur/1672326270.M619318P11927.<HOSTNAME>,S=2498,W=2551:2,Sa") = 0 Setting mbox_lazy_writes to yes and/or unsetting mail_cache_fields doesn't change anything. Any idea of what I am missing? Could this be a bug in Dovecot? Thanks in advance, -- Alexis Ben Miloud--Josselin <abenmiloud(a)evolix.fr> Evolix - Hébergement et Infogérance Open Source Marseille (37 rue Guibal, Pôle Média, 13003) / Paris / Montréal http://evolix.com | Twitter: @Evolix @EvolixNOC | http://blog.evolix.com

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Re: Corrupted sizes using zlib plugin
by Tim Evers 06 Mar '23

06 Mar '23

Am 06.03.23 um 11:42 schrieb Aki Tuomi: >> On 06/03/2023 12:32 EET Tim Evers <te-ml-ext(a)artfiles.de> wrote: >> >> >> Hi, >> >> since I did not get any feedback on my bug report post regarding >> corrupted sizes while using zlib >> (https://dovecot.org/pipermail/dovecot/2023-February/126105.html) I >> would like to confirm that this bug report reached someone in charge. >> >> Or if not - I would kindly ask for directions on how to post it in a way >> that spawns some action. >> >> Thx >> >> Tim > Can you try erasing dovecot.index.cache and see if the problem fixes itself? It's possible your cache contains invalid values from old errors. > > Aki Did that already several times (other dovecot.index.* files too). The only thing that helps is actually deleting the dovecot-uidlist file but the problem returns. Tim

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Corrupted sizes using zlib plugin
by Tim Evers 06 Mar '23

06 Mar '23

Hi, since I did not get any feedback on my bug report post regarding corrupted sizes while using zlib (https://dovecot.org/pipermail/dovecot/2023-February/126105.html) I would like to confirm that this bug report reached someone in charge. Or if not - I would kindly ask for directions on how to post it in a way that spawns some action. Thx Tim

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Setting up the mail-crypt plugin with virtual accounts that have no home directories
by Jeremy 05 Mar '23

05 Mar '23

Hi again, I am using dovecot 2.3.16, along with postfix and a PostgreSQL database for managing virtual accounts. After an initial topic from me about encrypting already existent mail, I could now use some pointers on how to set up the mail-crypt plugin for pure virtual accounts (i.e. that have no matching system users and/or home directories. I hope somebody can clarify a few things that are not entirely clear to me yet. After doing my own research, I believe the following should be possible: I'd like to use the password of virtual email accounts to let dovecot encrypt/decrypt the keys needed to encrypt/decrypt the mail in the relevant folders. As per the documentation @ https://doc.dovecot.org/configuration_manual/mail_crypt_plugin/ I believe this would be all the configuration I need: # Config mail_attribute_dict = file:%h/Maildir/dovecot-attributes mail_plugins = $mail_plugins mail_crypt plugin { mail_crypt_curve = secp521r1 # or some other preferred curve mail_crypt_save_version = 2 mail_crypt_require_encrypted_user_key = yes # necessary for encrypting keys with user password } # File: /etc/dovecot/dovecot-sql.conf.ext password_query = SELECT \ email as user, password, \ '%w' AS userdb_mail_crypt_private_password \ FROM virtual_users WHERE email='%u'; My first question is: Is it possible to configure mail_attribute_dict in such a way as to not use home directories. Since I only use virtual accounts, without those accounts having home directories, can I somehow tell dovecot to save the attributes into the PostsreSQL database, for instance? If not, can you suggest another approach, without having to create home directories for virtual users? My second question is: The documentation warns about not using password directly in the above SQL query: > Choosing encryption key > DO NOT use password directly. It can contain % which is interpreted as > variable expansion and can cause errors. Does this refer to not accidentally substituting '%w' with password? In other words, if I leave the above query as is, should I be good, even if plain text passwords of users potentially have % signs in them? Or would I need to take further measurements? (The passwords in my database are already hashed, by the way). I hope somebody can offer some guidance on this. Thanks.

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