September 2026 - dovecot

mail-crypt: user key generated with crypt_user_key_password still usable without it
by Twinsen＠die-optimisten.net 08 Sep '26

08 Sep '26

Hi, I please need help. Dovecot 2.4.1-4 (docker-mailserver 16.0.1), Maildir, passwd-file for both passdb and userdb. Config: mail_plugins = mail_crypt mail_attribute { dict file { path = %{home}/Maildir/dovecot-attributes } } crypt_user_key_curve = secp521r1 crypt_user_key_require_encrypted = yes I also added a second passdb in Lua that returns the login password as a sha256 hex string: passdb passdb-default { result_success = continue-ok } passdb lua { lua_file = /etc/dovecot/lua/crypt.lua skip = unauthenticated use_worker = yes } The Lua script returns PASSDB_RESULT_OK with: { noauthenticate = "yes", userdb_crypt_user_key_password = <sha256 hex> } What I have verified so far: doveadm auth login lists crypt_user_key_password under "userdb extra fields", so the field reaches userdb. With crypt_user_key_require_encrypted = no and the attributes file removed, an IMAP login auto-creates a user key. That key is unencrypted. With crypt_user_key_require_encrypted = yes and the attributes file removed, no key is created. IMAP logs: dict(file): stat(.../Maildir/dovecot-attributes) failed: No such file or directory So I generated the key manually: doveadm -o crypt_user_key_password=<sha256 hex> \ mailbox cryptokey generate -u user(a)example.com -Uf This succeeded. The new key is active, the old one shows as inactive, and the attributes file grew from 2280 to 3147 bytes. Now incoming mail is stored encrypted, the files start with CRYPTED. However, this still returns the headers in clear text, without any password and without error: doveadm fetch -u user(a)example.com hdr mailbox INBOX So the key appears to be usable without the password at all. My main question is: Does -o crypt_user_key_password actually encrypt the user key when it is generated, or is it only used to unlock an already encrypted key? Related to that: Can an old inactive user key still be used for decryption in this setup? Is there any marker that indicates in the attributes dict whether a user key is password-encrypted? With passwd-file as userdb (no prefetch), should an extra field from a passdb reach the IMAP process that creates or loads the key? Any pointers apreciated. Best regards, Twinsen

1 0

[2.4.5] LDAPS Panic: file ldap-utils.c: line 66: unreached
by inaugurator＠ya.ru 07 Sep '26

07 Sep '26

Hello, LDAP in passdb with 389 port works pretty well. But when I change port to 636 and use ldaps:// I get the error: ``` auth: Panic: file ldap-utils.c: line 66: unreached auth: Error: Raw backtrace: #0 default_fatal_finish[0x7a7e387b9ef4] -> #1 fatal_handler_real[0x7a7e387b9fb2] -> #2 i_internal_fatal_handler[0x7a7e387bb36d] -> #3 i_panic[0x7a7e387ba1ec] -> #4 i_unreached[0x7a7e387bb867] -> #5 ldap_set_opt_str[0x7a7e3763ad84] -> #6 ldap_set_tls_options[0x7a7e3763af3d] -> #7 ldap_set_options[0x7a7e3763200d] -> #8 db_ldap_init_ld[0x7a7e3763230f] -> #9 db_ldap_init[0x7a7e37633efb] -> #10 passdb_ldap_preinit[0x7a7e37635d22] -> #11 passdb_preinit[0x55cc948e7eb9] -> #12 auth_passdb_preinit[0x55cc948c0193] -> #13 auth_preinit[0x55cc948c0a87] -> #14 auths_preinit[0x55cc948c16de] -> #15 main_preinit[0x55cc948bf3e2] -> #16 main[0x55cc948bfae2] -> #17 __libc_init_first[0x7a7e383671d0] -> #18 __libc_start_main[0x7a7e38367280] -> #19 _start[0x55cc948bee20] master: Error: service(auth): command startup failed, throttling for 16.000 secs auth: Fatal: master: service(auth): child 344291 killed with signal 6 (core dumps disabled - https://dovecot.org/bugreport.html#coredumps) ```

1 0

Help with sieve
by Jorge Bastos 07 Sep '26

07 Sep '26

Hi guys, Small help with a sieve script, I have the script below in a useraccount, in this exact order. The redirect works, but the discard doesn't. A message that comes from the domain "clubefashing.com" or "nutribody.pt", is always redirected. Any idea what is wrong here? # rule:[blocks] if anyof (header :contains "from" "clubefashion.com", header :contains "from" "nutribody.pt") { discard; } # rule:[redir] if true { redirect "jorge(a)decimal.pt"; } Hi guys, Small help with a sieve script, I have the script below in a useraccount, in this exact order. The redirect works, but the discard doesn't. A message that comes from the domain "clubefashing.com" or "nutribody.pt", is always redirected. Any idea what is wrong here? # rule:[blocks] if anyof (header :contains "from" "clubefashion.com", header :contains "from" "nutribody.pt") { discard; } # rule:[redir] if true { redirect "jorge(a)decimal.pt"; }

4 6

Process destroy
by Christian H. Kuhn 06 Sep '26

06 Sep '26

Hi all, i have a user who cannot log in anymore with thunderbird. The problem arose after my updating to ubuntu 26.04. It is only that one user with his three accounts who has the problem. If i read the log right, he uses the correct credentials and could log in, if there wasn't a read problem with /proc/self/io and ad Process destroy. Here are the relevant data: root@bywater ~ # lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 26.04.1 LTS Release: 26.04 Codename: resolute root@bywater ~ # dovecot --version 2.4.2 (0962ed2104) /var/log/dovecot/dovecot.debug: 2026-09-06T08:51:08.583060+02:00 bywater dovecot: auth(user@sglasker.de,2a00:fbc:ec47:a4b1:c484:16a7:366c:c4a8,sasl:plain)<G6 Ad7cpaOMIqAA+87EekscSEFqc2bMSo>: Debug: sasl(plain): Set authid 'user(a)sglasker.de' 2026-09-06T08:51:08.583084+02:00 bywater dovecot: auth(user@sglasker.de,2a00:fbc:ec47:a4b1:c484:16a7:366c:c4a8,sasl:plain)<G6 Ad7cpaOMIqAA+87EekscSEFqc2bMSo>: Debug: sasl(plain): Performing plain passdb verification 2026-09-06T08:51:08.583108+02:00 bywater dovecot: auth(user@sglasker.de,2a00:fbc:ec47:a4b1:c484:16a7:366c:c4a8,sasl:plain)<G6 Ad7cpaOMIqAA+87EekscSEFqc2bMSo>: Debug: sql: Performing passdb lookup 2026-09-06T08:51:08.583178+02:00 bywater dovecot: auth-worker(user@sglasker.de,2a00:fbc:ec47:a4b1:c484:16a7:366c:c4a8)<339340><G6Ad7cpaOMIqAA+87EekscSEFqc2bMSo>: request [11]: Debug: sql: Performing passdb lookup 2026-09-06T08:51:08.583210+02:00 bywater dovecot: auth-worker(user@sglasker.de,2a00:fbc:ec47:a4b1:c484:16a7:366c:c4a8)<339340><G6Ad7cpaOMIqAA+87EekscSEFqc2bMSo>: request [11]: Debug: sql: query: SELECT email AS user, password FROM user WHERE email = 'user(a)sglasker.de' 2026-09-06T08:51:08.583374+02:00 bywater dovecot: auth-worker: Debug: mysql(127.0.0.1): Finished query 'SELECT email AS user, password FROM user WHERE email = 'user(a)sglasker.de'' in 0 msecs 2026-09-06T08:51:08.585565+02:00 bywater dovecot: auth-worker(user@sglasker.de,2a00:fbc:ec47:a4b1:c484:16a7:366c:c4a8)<339340><G6Ad7cpaOMIqAA+87EekscSEFqc2bMSo>: request [11]: Debug: sql: Finished passdb lookup 2026-09-06T08:51:08.585652+02:00 bywater dovecot: auth(user@sglasker.de,2a00:fbc:ec47:a4b1:c484:16a7:366c:c4a8,sasl:plain)<G6Ad7cpaOMIqAA+87EekscSEFqc2bMSo>: Debug: sql: Finished passdb lookup 2026-09-06T08:51:08.585677+02:00 bywater dovecot: auth(user@sglasker.de,2a00:fbc:ec47:a4b1:c484:16a7:366c:c4a8,sasl:plain)<G6Ad7cpaOMIqAA+87EekscSEFqc2bMSo>: Debug: sasl(plain): Finished plain passdb verification (status=ok) 2026-09-06T08:51:08.585704+02:00 bywater dovecot: auth(user@sglasker.de,2a00:fbc:ec47:a4b1:c484:16a7:366c:c4a8,sasl:plain)<G6Ad7cpaOMIqAA+87EekscSEFqc2bMSo>: Debug: sasl(plain): Interaction succeeded 2026-09-06T08:51:08.585738+02:00 bywater dovecot: auth(user@sglasker.de,2a00:fbc:ec47:a4b1:c484:16a7:366c:c4a8,sasl:plain)<G6Ad7cpaOMIqAA+87EekscSEFqc2bMSo>: Debug: Auth request finished 2026-09-06T08:51:08.585769+02:00 bywater dovecot: auth: Debug: conn unix:login (pid=339464,uid=111) [501]: client passdb out: OK#0111#011user=user(a)sglasker.de 2026-09-06T08:51:08.591149+02:00 bywater dovecot: auth(user@sglasker.de,2a00:fbc:ec47:a4b1:c484:16a7:366c:c4a8,sasl:plain)<G6Ad7cpaOMIqAA+87EekscSEFqc2bMSo>: Debug: static: Performing userdb lookup 2026-09-06T08:51:08.591186+02:00 bywater dovecot: auth(user@sglasker.de,2a00:fbc:ec47:a4b1:c484:16a7:366c:c4a8,sasl:plain)<G6Ad7cpaOMIqAA+87EekscSEFqc2bMSo>: Debug: static: Finished userdb lookup 2026-09-06T08:51:08.591209+02:00 bywater dovecot: auth: Debug: master userdb out: USER#011622723073#011user@sglasker.de#011uid=5000#011gid=5000#011home=/var/mail/vhosts/sglasker.de/user#011auth_mech=PLAIN#011auth_token=581264423b972f752ffa367319e23d10630ec484#011local_name=IMAP.qno.de 2026-09-06T08:51:08.591236+02:00 bywater dovecot: auth(user@sglasker.de,2a00:fbc:ec47:a4b1:c484:16a7:366c:c4a8)<G6Ad7cpaOMIqAA+87EekscSEFqc2bMSo>: Debug: sasl(plain): Request destroy 2026-09-06T08:51:08.591513+02:00 bywater dovecot: imap(user(a)sglasker.de)<339465><G6Ad7cpaOMIqAA+87EekscSEFqc2bMSo>: Debug: Effective uid=5000, gid=5000, home=/var/mail/vhosts/sglasker.de/user 2026-09-06T08:51:08.591603+02:00 bywater dovecot: imap(user(a)sglasker.de)<339465><G6Ad7cpaOMIqAA+87EekscSEFqc2bMSo>: Debug: open(/proc/self/io) failed: Permission denied (euid=5000(vmail) egid=5000(vmail) missing +r perm: /proc/self/io) 2026-09-06T08:51:08.591811+02:00 bywater dovecot: imap(user(a)sglasker.de)<339465><G6Ad7cpaOMIqAA+87EekscSEFqc2bMSo>: Debug: Namespace inbox: type=private, prefix=, sep=, inbox=yes, hidden=no, list=yes, subscriptions=yes 2026-09-06T08:51:08.591868+02:00 bywater dovecot: imap(user(a)sglasker.de)<339465><G6Ad7cpaOMIqAA+87EekscSEFqc2bMSo>: Debug: maildir++: root=/var/mail/vhosts/sglasker.de/user/Maildir, index=, indexpvt=, control=, inbox=/var/mail/vhosts/sglasker.de/user/Maildir, alt= 2026-09-06T08:51:08.981986+02:00 bywater dovecot: imap(user(a)sglasker.de)<339465><G6Ad7cpaOMIqAA+87EekscSEFqc2bMSo>: Debug: Mailbox INBOX: Mailbox opened Any hints? TIA QNo

1 0

Process destroy
by Christian H. Kuhn 06 Sep '26

06 Sep '26

Hi all, i have a user who cannot log in anymore with thunderbird. The problem arose after my updating to ubuntu 26.04. It is only that one user with his three accounts who has the problem. If i read the log right, he uses the correct credentials and could log in, if there wasn't a read problem with /proc/self/io and ad Process destroy. Here are the relevant data: root@bywater ~ # lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 26.04.1 LTS Release: 26.04 Codename: resolute root@bywater ~ # dovecot --version 2.4.2 (0962ed2104) /var/log/dovecot/dovecot.debug: 2026-09-06T08:51:08.583060+02:00 bywater dovecot: auth(user@sglasker.de,2a00:fbc:ec47:a4b1:c484:16a7:366c:c4a8,sasl:plain)<G6 Ad7cpaOMIqAA+87EekscSEFqc2bMSo>: Debug: sasl(plain): Set authid 'user(a)sglasker.de' 2026-09-06T08:51:08.583084+02:00 bywater dovecot: auth(user@sglasker.de,2a00:fbc:ec47:a4b1:c484:16a7:366c:c4a8,sasl:plain)<G6 Ad7cpaOMIqAA+87EekscSEFqc2bMSo>: Debug: sasl(plain): Performing plain passdb verification 2026-09-06T08:51:08.583108+02:00 bywater dovecot: auth(user@sglasker.de,2a00:fbc:ec47:a4b1:c484:16a7:366c:c4a8,sasl:plain)<G6 Ad7cpaOMIqAA+87EekscSEFqc2bMSo>: Debug: sql: Performing passdb lookup 2026-09-06T08:51:08.583178+02:00 bywater dovecot: auth-worker(user@sglasker.de,2a00:fbc:ec47:a4b1:c484:16a7:366c:c4a8)<339340><G6Ad7cpaOMIqAA+87EekscSEFqc2bMSo>: request [11]: Debug: sql: Performing passdb lookup 2026-09-06T08:51:08.583210+02:00 bywater dovecot: auth-worker(user@sglasker.de,2a00:fbc:ec47:a4b1:c484:16a7:366c:c4a8)<339340><G6Ad7cpaOMIqAA+87EekscSEFqc2bMSo>: request [11]: Debug: sql: query: SELECT email AS user, password FROM user WHERE email = 'user(a)sglasker.de' 2026-09-06T08:51:08.583374+02:00 bywater dovecot: auth-worker: Debug: mysql(127.0.0.1): Finished query 'SELECT email AS user, password FROM user WHERE email = 'user(a)sglasker.de'' in 0 msecs 2026-09-06T08:51:08.585565+02:00 bywater dovecot: auth-worker(user@sglasker.de,2a00:fbc:ec47:a4b1:c484:16a7:366c:c4a8)<339340><G6Ad7cpaOMIqAA+87EekscSEFqc2bMSo>: request [11]: Debug: sql: Finished passdb lookup 2026-09-06T08:51:08.585652+02:00 bywater dovecot: auth(user@sglasker.de,2a00:fbc:ec47:a4b1:c484:16a7:366c:c4a8,sasl:plain)<G6Ad7cpaOMIqAA+87EekscSEFqc2bMSo>: Debug: sql: Finished passdb lookup 2026-09-06T08:51:08.585677+02:00 bywater dovecot: auth(user@sglasker.de,2a00:fbc:ec47:a4b1:c484:16a7:366c:c4a8,sasl:plain)<G6Ad7cpaOMIqAA+87EekscSEFqc2bMSo>: Debug: sasl(plain): Finished plain passdb verification (status=ok) 2026-09-06T08:51:08.585704+02:00 bywater dovecot: auth(user@sglasker.de,2a00:fbc:ec47:a4b1:c484:16a7:366c:c4a8,sasl:plain)<G6Ad7cpaOMIqAA+87EekscSEFqc2bMSo>: Debug: sasl(plain): Interaction succeeded 2026-09-06T08:51:08.585738+02:00 bywater dovecot: auth(user@sglasker.de,2a00:fbc:ec47:a4b1:c484:16a7:366c:c4a8,sasl:plain)<G6Ad7cpaOMIqAA+87EekscSEFqc2bMSo>: Debug: Auth request finished 2026-09-06T08:51:08.585769+02:00 bywater dovecot: auth: Debug: conn unix:login (pid=339464,uid=111) [501]: client passdb out: OK#0111#011user=user(a)sglasker.de 2026-09-06T08:51:08.591149+02:00 bywater dovecot: auth(user@sglasker.de,2a00:fbc:ec47:a4b1:c484:16a7:366c:c4a8,sasl:plain)<G6Ad7cpaOMIqAA+87EekscSEFqc2bMSo>: Debug: static: Performing userdb lookup 2026-09-06T08:51:08.591186+02:00 bywater dovecot: auth(user@sglasker.de,2a00:fbc:ec47:a4b1:c484:16a7:366c:c4a8,sasl:plain)<G6Ad7cpaOMIqAA+87EekscSEFqc2bMSo>: Debug: static: Finished userdb lookup 2026-09-06T08:51:08.591209+02:00 bywater dovecot: auth: Debug: master userdb out: USER#011622723073#011user@sglasker.de#011uid=5000#011gid=5000#011home=/var/mail/vhosts/sglasker.de/user#011auth_mech=PLAIN#011auth_token=581264423b972f752ffa367319e23d10630ec484#011local_name=IMAP.qno.de 2026-09-06T08:51:08.591236+02:00 bywater dovecot: auth(user@sglasker.de,2a00:fbc:ec47:a4b1:c484:16a7:366c:c4a8)<G6Ad7cpaOMIqAA+87EekscSEFqc2bMSo>: Debug: sasl(plain): Request destroy 2026-09-06T08:51:08.591513+02:00 bywater dovecot: imap(user(a)sglasker.de)<339465><G6Ad7cpaOMIqAA+87EekscSEFqc2bMSo>: Debug: Effective uid=5000, gid=5000, home=/var/mail/vhosts/sglasker.de/user 2026-09-06T08:51:08.591603+02:00 bywater dovecot: imap(user(a)sglasker.de)<339465><G6Ad7cpaOMIqAA+87EekscSEFqc2bMSo>: Debug: open(/proc/self/io) failed: Permission denied (euid=5000(vmail) egid=5000(vmail) missing +r perm: /proc/self/io) 2026-09-06T08:51:08.591811+02:00 bywater dovecot: imap(user(a)sglasker.de)<339465><G6Ad7cpaOMIqAA+87EekscSEFqc2bMSo>: Debug: Namespace inbox: type=private, prefix=, sep=, inbox=yes, hidden=no, list=yes, subscriptions=yes 2026-09-06T08:51:08.591868+02:00 bywater dovecot: imap(user(a)sglasker.de)<339465><G6Ad7cpaOMIqAA+87EekscSEFqc2bMSo>: Debug: maildir++: root=/var/mail/vhosts/sglasker.de/user/Maildir, index=, indexpvt=, control=, inbox=/var/mail/vhosts/sglasker.de/user/Maildir, alt= 2026-09-06T08:51:08.981986+02:00 bywater dovecot: imap(user(a)sglasker.de)<339465><G6Ad7cpaOMIqAA+87EekscSEFqc2bMSo>: Debug: Mailbox INBOX: Mailbox opened Any hints? TIA QNo

1 0

History Assignment Writing Help – Expert Assistance
by Theo Wilson 05 Sep '26

05 Sep '26

Struggling with your history assignments? Our History Assignment Writing Help service offers expert guidance to help you craft well-researched, structured, and original assignments. Fill out this form to get personalized support from experienced writers and improve your grades with ease. https://www.newassignmenthelp.co.uk/history-assignment-help

2 1

Pay Someone to Take My Online Course?
by xotawa2329＠hapincy.com 05 Sep '26

05 Sep '26

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6 6

Quota messages warning
by Alberto 04 Sep '26

04 Sep '26

I have dovecot 2.4.5 in a Docker container and warning quota of message count isn't working. My quota config: quota "User quota" { driver = count quota_warning warn-espacio-95 { quota_storage_percentage = 95 execute quota-warning { args = espacio-95 %{user} } } quota_warning warn-mensajes-95 { quota_message_percentage = 95 execute quota-warning { args = cantidad-95 %{user} } } quota_warning warn-espacio-85 { quota_storage_percentage = 85 execute quota-warning { args = espacio-85 %{user} } } quota_warning warn-mensajes-85 { quota_message_percentage = 85 execute quota-warning { args = cantidad-85 %{user} } } quota_warning warn-espacio-75 { quota_storage_percentage = 75 execute quota-warning { args = espacio-75 %{user} } } quota_warning warn-mensajes-75 { quota_message_percentage = 75 execute quota-warning { args = cantidad-75 %{user} } } } In storage option works ok, but in case of messages no event success. Log not show anything and external script is not call, of course. Any idea? Best Regards, Alberto

4 8

Lazy-Expunge plugin documentation incomplete?
by Randolf Richardson 04 Sep '26

04 Sep '26

One of the Dovecot repository maintainers on GitHub recommended sending an eMail to you regarding the issue I encountered: Documentation for lazy-expunge doesn't work https://github.com/dovecot/documentation/issues/1555 -------- I converted from Dovecot 2.3 to Dovecot 2.4.1, which was not a minor upgrade. Anyway, I can't get the lazy-expunge plugin to work in 2.4.1 now. Here's my configuration file from 2.3 -- how can I get this working in 2.4.1? Thanks. namespace inbox { mailbox EXPUNGED { autoexpunge = 32days autoexpunge_max_mails = 100000 #auto = create } } # Namespace for lazy_expunge plugin namespace { prefix = EXPUNGED/ hidden = yes list = no subscriptions = no separator = / location = maildir:~/Maildir.deleted:INDEX= } mail_plugins = $mail_plugins lazy_expunge acl plugin { # Move expunged messages into the .EXPUNGED namespace lazy_expunge = EXPUNGED/ # Only move to expunged storage if this is the last copy of the message in the user´s account lazy_expunge_only_last_instance = yes # Exclude Drafts from lazy expunging lazy_expunge_exclude = \Drafts # Copy of each message is done with hard links whenever possible maildir_copy_with_hardlinks = yes # Define ACL so that user cannot list the .EXPUNGED mailbox # Example entry: .EXPUNGED owner rwstipekxa acl = vfile:/etc/dovecot/dovecot.acl # dovecot.acl contains one line: EXPUNGED owner ip # Expunged messages most likely don't want to be included in quota: quota_rule = EXPUNGED:ignore } #lazy_expunge_mailbox = EXPUNGED Here's an example of someone else who encountered the same problem: https://www.dovecot.org/mailman3/archives/list/dovecot@dovecot.org/thr ead/25BXSHQWGQQ3ACVZSYF3O3LC4WROTUCI/ Randolf Richardson, CNA - randolf(a)inter-corporate.com Inter-Corporate Computer & Network Services, Inc. Beautiful British Columbia, Canada https://www.inter-corporate.com/

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Config parser bug?
by Pat Suwalski 03 Sep '26

03 Sep '26

Hello, I recently upgraded my servers from Debian Bullseye to Trixie (2.3 -> 2.4). I have a pretty basic config, though I use Maildir instead of Debian's default of mbox. In the process of getting things working correctly for the new config format, I believe I have stumbled on a bug. To make the inbox work correctly, I need the mail_inbox_path variable to be unset. This is because the default shipped 10-mail.conf file from Debian has: mail_driver = mbox mail_home = /home/%{user | username} mail_path = %{home}/mail mail_inbox_path = /var/mail/%{user} So, I overrode the mail_driver and mail_path in my local.conf. From the documentation, it seems like I should be able to set: mail_inbox_path = And that should clear it. Certainly, doveconf shows no mail_inbox_path variable set when that happens. However, no inbox! If I comment out mail_inbox_path from 10-mail.conf, doveconf output is identical, however the inbox works. My workaround is to make it the same as mail_path: mail_inbox_path = ~/Maildir However, I think the variable unsetting is buggy. This is dovecot 2.4.1. --Pat

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