August 2025 - dovecot

How to offer different translations for virtual namespaces with userdb?
by Ákos Szőts 23 Aug '25

23 Aug '25

Hi everyone, I'd like to configure a feature that, based on userdb locale settings, returns with differently translated string for the same virtual namespace mailbox name. This is where I ended up so far: group @namespaces virtual-virtual-english { mailbox All { auto = no special_use = \All } } group @namespaces virtual-virtual-hungarian { mailbox "Összes levél" { auto = no special_use = \All } } namespace virtual-virtual { prefix = Virtual/ separator = / mail_driver = virtual mail_path = /var/lib/dovecot/virtual/virtual mail_index_path = %{home}/index/virtual/virtual namespace_subscriptions = no list = children hidden = no } UserDB query works: Debug: Added setting via userdb: namespace/virtual-virtual/@namespaces=virtual-virtual-hungarian I had to create symlinks in the virtual/virtual directory (otherwise the Hungarian version wouldn't work): # virtual/virtual All &ANY-sszes lev&AOk-l -> All/ When I list the mailboxes, however, I get back all of them, not just the matching-language elements: * LIST (\Noselect \HasChildren) "/" Virtual * LIST (\HasNoChildren) "/" "Virtual/&ANY-sszes lev&AOk-l" * LIST (\HasNoChildren \All) "/" Virtual/All "list", "hidden", and "prefix" are seemingly not allowed within a group. How can I offer different translations for different users in my home setup? Is it possible to translate the namespace prefix? Dovecot version: 2.4.1. Thank you, Ákos

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Missing IMAP METADATA Plugin
by Adam Miller 23 Aug '25

23 Aug '25

OS: Ubuntu 22.04.1 Dovecot: 2.3.16 (7e2e900c1a) When trying to enable the “imap_metadata” plugin, I get the following error: Plugin 'imap_metadata' not found from directory /usr/lib/dovecot/modules I have searched high and low via Google, StackOverflow and even ChatGPT (haha) but I cannot seem to find the package that provides the plugin. Does Dovecot have to be built from source for this plugin to be included? Any help is appreciated. Thank you!

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getpwnam() failed: Resource temporarily unavailable
by Hauke Fath 22 Aug '25

22 Aug '25

Hi, I see a very peculiar Dovecot (2.3.21.1) authentication failure that concerns exactly one user: Aug 20 02:08:05 Bounce dovecot: auth-worker(13245): Debug: conn unix:auth-worker (pid=3029,uid=81): auth-worker<24>: Handling PASSV request Aug 20 02:08:05 Bounce dovecot: auth-worker(13245): Debug: conn unix:auth-worker (pid=3029,uid=81): auth-worker<24>: passwd(REDACTED_UID,84.136.89.217,<yZxQxMA8uL1UiFnZ>): Performing passdb lookup Aug 20 02:08:05 Bounce dovecot: auth-worker(13245): Debug: conn unix:auth-worker (pid=3029,uid=81): auth-worker<24>: passwd(REDACTED_UID,84.136.89.217,<yZxQxMA8uL1UiFnZ>): lookup Aug 20 02:08:05 Bounce dovecot: auth-worker(13245): Error: conn unix:auth-worker (pid=3029,uid=81): auth-worker<24>: passwd(REDACTED_UID,84.136.89.217,<yZxQxMA8uL1UiFnZ>): getpwnam() failed: Resource temporarily unavailable Aug 20 02:08:05 Bounce dovecot: auth-worker(13245): Debug: conn unix:auth-worker (pid=3029,uid=81): auth-worker<24>: passwd(REDACTED_UID,84.136.89.217,<yZxQxMA8uL1UiFnZ>): Finished passdb lookup Aug 20 02:08:05 Bounce dovecot: auth-worker(13245): Debug: conn unix:auth-worker (pid=3029,uid=81): auth-worker<24>: Finished: internal_failure This used to work, until a few months ago it stopped. The user can still authenticate to send mail through the same server. Changing the password didn't make a difference. Any ideas? Cheerio, Hauke -- The ASCII Ribbon Campaign Hauke Fath () No HTML/RTF in email Institut für Nachrichtentechnik /\ No Word docs in email TU Darmstadt Respect for open standards Ruf +49-6151-16-21344

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How to remove non-existent virtual mailbox from index
by Ákos Szőts 21 Aug '25

21 Aug '25

Hi everyone, During experimentation I created a "Test1" mailbox under a virtual namespace: mailbox "Test1" { auto = no special_use = \All } I commented it out before restarting Dovecot, and it's never been subscribed to either. I see the Test1 directory is still within my "index" directory and there's a "dovecot.index.log" in it. When I try to force resync all my virtual mailboxes, doveadm complains about it: $ doveadm -D force-resync -A Virtual/* Debug: Namespace virtual-virtual: [...]/virtual/Test1 doesn't exist yet, using default permissions Debug: Namespace virtual-virtual: Using permissions from [...]/virtual: mode=0755 gid=default Error: Mailbox Virtual/Test1: mkdir_parents([...]/virtual/Virtual/Test1) failed: Permission denied Error: Mailbox Virtual/Test1: Failed to create path: [...]/virtual/Virtual/Test1 for mailbox Virtual/Test1: mkdir_parents([...]/virtual/Virtual/Test1) failed: Permission denied What is the proper command to remove it from the index? I tried "cache purge", but that fails, too. I can "rm -rf" the whole index directory and that solves this issue. However, I think there should be a more gentle solution. Thank you, Ákos

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"imap-login" crashes at lib-ssl-iostream/iostream-ssl.c:55
by Ákos Szőts 21 Aug '25

21 Aug '25

Hi all, When I start "imap-login" without arguments, it crashes: gdb -ex run --args /usr/lib/dovecot/imap-login (gdb) thread apply all bt full Thread 1 (Thread 0x7f5bd50c6740 (LWP 625) "imap-login"): #0 0x00007f5bd545fe97in io_stream_ssl_global_init(set=0x56205ca355c8, error_r=0x7ffdf0e669a8) at ../lib-ssl-iostream/iostream-ssl.c:55 No locals. #1 0x00007f5bd558d15bin login_ssl_init() at /usr/src/debug/dovecot-2.4.1-4/src/login-common/main.c:343 ssl_set= 0x56205ca355c8 error= 0xc00000<error: Cannot access memory at address 0xc00000> #2 main_preinit() at /usr/src/debug/dovecot-2.4.1-4/src/login-common/main.c:355 max_fds= <optimized out> __func__= <optimized out> #3 login_binary_run(binary=<optimized out>, argc=<optimized out>, argv=<optimized out>) at /usr/src/debug/dovecot-2.4.1-4/src/login-common/main.c:528 service_flags= <optimized out> login_socket= 0x7f5bd5590b66"login" error= 0x1000000<error: Cannot access memory at address 0x1000000> c= <optimized out> input= {config_path= 0x0, config_fd= 0, preserve_environment= false, preserve_user= false, preserve_home= false, no_service_filter= false, check_full_config= false, hide_obsol ete_warnings= false, no_protocol_filter= false, no_key_validation= false, reload_config= false, never_exec= false, always_exec= false, return_config_fd= false, use_sysexits= false, pr otocol= 0x562033d837ac"imap"} output= {specific_protocols= 0x56205ca15398, config_fd= -1, permission_denied= false} #4 0x00007f5bd51662aein __libc_start_call_main() from /lib64/libc.so.6 No symbol table info available. #5 0x00007f5bd5166379in __libc_start_main_impl() from /lib64/libc.so.6 No symbol table info available. #6 0x0000562033d79885in _start() at ../sysdeps/x86_64/start.S:115 No locals. Probably "ssl_vfuncs->[...]" is a NULL dereference? I'm debugging a crash within Dovecot and this was one of my findings. Dovecot version: 2.4.1. Ákos

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dovecot RHEL 10 packages
by burnzerog＠gmail.com 19 Aug '25

19 Aug '25

Hi, I see only RHEL 8 and 9 packages but not for RHEL 10 in repo.dovecot.org. Do you think it can be released soon? Thank you.

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quota_clone + dict_file_path wound up being somewhat cumbersome on 2.4
by Andy Baugh 19 Aug '25

19 Aug '25

The quota_clone syntax is rather cumbersome in comparison to 2.3 when using a flat file dictionary. I found I needed to make a "bogus" config block first: quota_clone { dict file { path = ${userdb:mail_path}/dovecot-quota } } Bogus, as the code path which actually deals with that doesn't have the ${userdb:*} vars available (visible by stracing the dovecot process, and seeing it fail to make /dovecotquota for obvious reasons). That said, if you don't include *some* value, it will explode even when you provide the *correct* value via userdb unless you initialize quota clone earlier there in the config. In this case for the 'luser' user: quota_clone/dict/file/path: /home/luser/mail/dovecot-quota wound up being the param I needed in order to get that logged in the right place for that specific user. None of how to format this properly was remotely clear to me from the documentation when looking at the quota_clone page: https://doc.dovecot.org/main/core/config/dict.html#flat-files As such I made an educated guess after reading the quota_clone code and testing a few things out. This actually works, so I'm happy with it for now. Not sure what this means RE the documentation, as even though it's not exactly obvious, I clearly was able to piece it together for the most part just by reading other documentation pages which mentioned things like separating namespaces by slashes, etc. I don't know how to properly convey "hey here's the list of where all these vars are actually able to be set and not set," as there's clearly some context there that's missing unless you go digging in the code. Cheers, -- Thomas "Andy" Baugh | Software Development Engineer IV 713-384-8831 andy.baugh(a)webpros.com www.webpros.com

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On Dovecot 2.4, auth-legacy setting for the auth service appears to be no-op when using lua passdb
by Andy Baugh 19 Aug '25

19 Aug '25

So, I used https://doc.dovecot.org/main/installation/upgrade/2.3-to-2.4.html#exim-auth… to ensure exim still worked. Unfortunately, that doesn't seem to be the case. Sender verification, auth, etc. *will* fail until you specifically start sending back those old params as well as the updated ones. I am using lua for the passdb/userdb however, so presumably it's just not documented that this is an "exercise for the reader" when using lua. In particular you need to deliver the 'mail' and 'quota' fields as they previously existed (colon separated) alongside the new dovecot params. Hope this helps someone else out there. Cheers, -- Thomas "Andy" Baugh | Software Development Engineer IV andy.baugh(a)webpros.com www.webpros.com

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'duplicate listener' on port 465
by William David Edwards 17 Aug '25

17 Aug '25

Hi, When configuring SMTPS as described on https://doc.dovecot.org/main/core/config/submission.html#smtps, Dovecot says there is a 'duplicate listener'. MRE: ``` root@dovecot24-test:/etc/dovecot/conf.d# doveconf -n # 2.4.1-4+debian12 (7d8c0e5759): /etc/dovecot/dovecot.conf # Pigeonhole version 2.4.1-4+debian12 (0a86619f) # OS: Linux 6.1.0-29-amd64 x86_64 Debian 12.11 # Hostname: dovecot24-test.cyberfusion.nl # 4 default setting changes since version 2.4.0 dovecot_config_version = 2.4.0 dovecot_storage_version = 2.4.0 protocols = submission service submission-login { inet_listener submission_465 { port = 465 } } doveconf: Error: duplicate listener: 465:* doveconf: Fatal: Error in configuration file /etc/dovecot/dovecot.conf: duplicate listener: 465:* ``` Can anyone help me understand why this listener would be 'duplicate'? This setup worked on 2.3.21.1. Thanks! William David Edwards

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github: minimal dovecot 2.4 setup for testing in docker
by Rory Campbell-Lange 15 Aug '25

15 Aug '25

Hi Everyone I've made a simple dovecot.conf and accompanying users.db file suitable for running in Docker. At the moment this simply shows how to force the default domain using the "auth_default_domain" setting. I'm hoping this will be a helpful jumping off point if you need to upgrade your Dovecot config ... and want to test outside of production. Instructions and the minimal conf and db file are here: https://github.com/rorycl/dovecot-config Feel free to improve the setup by submitting a PR. If you'd like to add some other scenarios please also submit PRs. My suggested arrangement for that is in a directory named by feature, with a README.md, minimal conf file, support files (only if necessary) and log.txt showing the expected output. Cheers Rory

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