- dovecot - dovecot.org

Slow inbox
by Rupert Gallagher 18 Sep '25

18 Sep '25

Hello, I note the following problem. If the inbox holds many subfolders with mail, thunderbird spends a lot of time on startup. To mitigate the problem, I asked users to keep the inbox clear of subfolders. However, a user keeps ignoring the local policy while also lamenting the mail is slow. Please write instructions to enforce this local policy in dovecot, so that when users try to create an inbox subfolder, dovecot refuses the action. Thank you

4 6

duplicates
by Kevin Kretz 18 Sep '25

18 Sep '25

Hi, We use Dovecot and Postfix for internal emails and keep aliases in an LDAP table. We have multiple sites, with some user mailboxes local to each. If user A and B are both in alias OurGroup, and a message is sent to [ mailto:ourgroup@domain.com | ourgroup(a)domain.com ] [ mailto:a@domain.com | a(a)domain.com ] and [ mailto:b@domain.com, | b(a)domain.com, ] a and b will receive two copies of the message. Should this be addressed with Postfix or Dovecot? thanks Hi, We use Dovecot and Postfix for internal emails and keep aliases in an LDAP table. We have multiple sites, with some user mailboxes local to each. If user A and B are both in alias OurGroup, and a message is sent to [1]ourgroup(a)domain.com [2]a(a)domain.com and [3]b(a)domain.com, a and b will receive two copies of the message. Should this be addressed with Postfix or Dovecot? thanks References Visible links 1. mailto:ourgroup@domain.com 2. mailto:a@domain.com 3. mailto:b@domain.com,

1 0

fts_flatcurve max_term_size config missing or broken in v2.4
by publists＠emailgroups.net 17 Sep '25

17 Sep '25

Hi, I'm working on migrating my v2.3 -> v2.4 configuration. From my 2.3 config I have ... fts flatcurve { commit_limit = 2000 29 max_term_size = 60 min_term_size = 3 substring_search = yes } ... From reading the current docs' "Configuration Example" https://doc.dovecot.org/2.4.1/core/plugins/fts_flatcurve.html#configuration… that looks OK for v2.4.1 too. But a config check fails, doveconf: Fatal: Error in configuration file /etc/dovecot/conf.d/50-fts.conf line 29: max_term_size: Unknown setting: max_term_size (fts_max_term_size or fts_flatcurve_max_term_size not found either.) There's no mention of "max_term_size" in https://doc.dovecot.org/2.4.1/installation/upgrade/2.3-to-2.4.html as a change. It's also NOT listed as a current setting at https://doc.dovecot.org/2.4.1/core/summaries/settings.html Checking in code sources cd dovecot git checkout release-2.4.1 Switched to branch 'release-2.4.1' Your branch is up to date with 'origin/release-2.4.1'. "min_term_size" is in use grep "min_term_size" * fts-backend-flatcurve.c: if (size < ctx->backend->fuser->set->min_term_size) fts-backend-flatcurve-xapian.cc: * smaller than min_term_size. Requires libicu in order to correctly handle fts-backend-flatcurve-xapian.cc: if (len < fuser->set->min_term_size) fts-backend-flatcurve-xapian.cc: if (len < fuser->set->min_term_size) fts-flatcurve-settings.c: DEF(UINT, min_term_size), fts-flatcurve-settings.c: .min_term_size = 2, fts-flatcurve-settings.h: unsigned int min_term_size; But no trace of "max_term_size" at all from grep "max_term_size" * Is "max_term_size" still valid config? Does code or documentation, or both, need to change? Or am I misreading the usage? Thanks, Dave

2 1

dovecot and oauth2 on fedora42
by Alex 14 Sep '25

14 Sep '25

Hi, I have a fedora42 system with dovecot-2.3.21 and trying to configure oauth2 support for a client application called acymailing as part of joomla. I'm trying to follow the instructions here, but I don't understand why I would need to involve google as the provider. How do I create my own provider? I don't want to authenticate against google, but against my own user database inside of joomla. I can create a local user, if that makes it possible, but not sure how to create the local provider it seems to require. https://doc.dovecot.org/2.3/configuration_manual/authentication/oauth2/ Thanks, Alex Hi, I have a fedora42 system with dovecot-2.3.21 and trying to configure oauth2 support for a client application called acymailing as part of joomla. I'm trying to follow the instructions here, but I don't understand why I would need to involve google as the provider. How do I create my own provider? I don't want to authenticate against google, but against my own user database inside of joomla. I can create a local user, if that makes it possible, but not sure how to create the local provider it seems to require. [1]https://doc.dovecot.org/2.3/configuration_manual/authentication/oauth2/ Thanks, Alex References Visible links 1. https://doc.dovecot.org/2.3/configuration_manual/authentication/oauth2/

1 0

[Dovecot] auth: Error: net_connect_unix(anvil-auth-penalty) failed: Permission denied
by mailing＠securitylabs.it 14 Sep '25

14 Sep '25

Hello, just upgraded one of my testing machine from dovecot 1.2.15 to 2.0.7. After some trouble with permissions now all seems working, but when I stop dovecot I have these errors in log: Nov 9 17:08:07 in dovecot: master: Warning: Killed with signal 15 (by pid=20362 uid=0 code=kill) Nov 9 17:08:07 in dovecot: pop3-login: Error: read(anvil) failed: EOF Nov 9 17:08:07 in dovecot: imap-login: Error: read(anvil) failed: EOF Nov 9 17:08:07 in dovecot: imap(mailing(a)securitylabs.it): Server shutting down. bytes=410/59361 Nov 9 17:08:07 in dovecot: imap(mailing(a)securitylabs.it): Server shutting down. bytes=79/26605 Nov 9 17:08:07 in dovecot: imap(mailing(a)securitylabs.it): Server shutting down. bytes=802/55708 Nov 9 17:08:07 in dovecot: imap(mailing(a)securitylabs.it): Server shutting down. bytes=258/1242 Nov 9 17:08:07 in dovecot: auth: Error: read(anvil-auth-penalty) failed: EOF Nov 9 17:08:07 in dovecot: auth: Error: net_connect_unix(anvil-auth-penalty) failed: Permission denied dovecot -n: # 2.0.7: /usr/local/etc/dovecot/dovecot.conf # OS: Linux 2.6.32-5-xen-686 i686 Debian squeeze/sid auth_cache_negative_ttl = 2 mins auth_cache_size = 1000 M auth_cache_ttl = 2 mins auth_master_user_separator = * auth_username_chars = abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890.-_@& disable_plaintext_auth = no dotlock_use_excl = yes first_valid_uid = 100 last_valid_uid = 105 lock_method = dotlock log_timestamp = "%Y-%m-%d %H:%M:%S " login_greeting = Server ready. mail_fsync = never mail_gid = Debian-exim mail_location = maildir:~/Maildir:INDEX=/var/indexes/%d/%n mail_privileged_group = Debian-exim mail_uid = Debian-exim 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 namespace { inbox = yes location = prefix = separator = / type = private } namespace { location = maildir:~/Maildir/expunged prefix = EXPUNGED/ separator = / type = private } namespace { location = maildir:~/Maildir/deleted prefix = DELETED/ separator = / type = private } namespace { location = maildir:~/Maildir/deleted/expunged prefix = DELETED/EXPUNGED/ separator = / type = private } passdb { args = /usr/local/etc/dovecot-sql.conf driver = sql } passdb { args = /usr/local/etc/passwd.masterusers driver = passwd-file master = yes pass = yes } plugin { lazy_expunge = EXPUNGED/ DELETED/ DELETED/EXPUNGED/ mail_log_events = delete expunge mail_log_group_events = quota = maildir quota_warning = storage=80%% /usr/local/bin/dovecot-quota-warning.sh 80 quota_warning2 = storage=90%% /usr/local/bin/dovecot-quota-warning.sh 90 sieve = ~/.dovecot.sieve } pop3_no_flag_updates = yes protocols = imap pop3 service auth { unix_listener auth-userdb { group = Debian-exim mode = 0600 user = Debian-exim } } service imap-login { client_limit = 256 process_limit = 128 process_min_avail = 3 service_count = 1 } service imap { drop_priv_before_exec = yes process_limit = 256 vsz_limit = 256 B } service pop3-login { client_limit = 256 process_limit = 128 process_min_avail = 3 service_count = 1 } service pop3 { drop_priv_before_exec = yes process_limit = 256 vsz_limit = 256 B } ssl_cert = </usr/local/etc/dovecot.crt ssl_key = </usr/local/etc/dovecot.key userdb { args = /usr/local/etc/dovecot-sql.conf driver = sql } protocol imap { mail_max_userip_connections = 10 mail_plugins = " notify quota imap_quota mail_log lazy_expunge" } protocol pop3 { mail_max_userip_connections = 3 mail_plugins = " notify quota mail_log" pop3_uidl_format = %08Xu%08Xv } protocol lda { mail_plugins = quota sieve postmaster_address = postmaster(a)securitylabs.it } My /usr/local/var/run/dovecot directory: 4 drwxr-sr-x 4 root staff 4096 Nov 9 17:08 . 4 drwxrwsrwx 3 root staff 4096 Nov 9 17:05 .. 0 srw------- 1 root staff 0 Nov 9 17:05 anvil 0 srw------- 1 root staff 0 Nov 9 17:05 anvil-auth-penalty 0 srw------- 1 root staff 0 Nov 9 17:05 auth-client 0 srw------- 1 dovecot staff 0 Nov 9 17:05 auth-login 0 srw------- 1 root staff 0 Nov 9 17:05 auth-master 0 srw------- 1 Debian-exim Debian-exim 0 Nov 9 17:05 auth-userdb 0 srw------- 1 dovecot staff 0 Nov 9 17:05 auth-worker 0 srw------- 1 root staff 0 Nov 9 17:05 config 0 srw------- 1 root staff 0 Nov 9 17:05 dict 0 srw------- 1 root staff 0 Nov 9 17:05 director-admin 0 srw-rw-rw- 1 root staff 0 Nov 9 17:05 dns-client 0 srw------- 1 root staff 0 Nov 9 17:05 doveadm-server 0 lrwxrwxrwx 1 root staff 35 Nov 9 17:05 dovecot.conf -> /usr/local/etc/dovecot/dovecot.conf 4 drwxr-xr-x 2 root root 4096 Nov 9 17:05 empty 4 drwxr-x--- 2 root dovenull 4096 Nov 9 17:05 login My emails are delivered as user Debian-exim and users are virtual in a MySQL DB. This system is behind a proxy (so the master user)

4 3

hidden / alias_for / sieve
by Erick Calder 12 Sep '25

12 Sep '25

hi. I'm running on Fedora 42 and want to hide the Deleted Messages folder (because I want to use Trash instead). unfortunately this fails: mailbox "Deleted Messages" { hidden = yes } which I understand depends on the "mailbox" plugin. however, when I look in /var/lib64/dovecot, I don't see any such plugin. I also cannot find in the repositories any RPM that provides it. I understand it may be baked into the core binary but if so, enabling it should work, and yet if I do enable it, I get the error below: Sep 11 10:06:01 mail dovecot[739762]: imap(ekkis): Error: Plugin 'mailbox' not found from directory /usr/lib64/dovecot I would also like to use the alias_for but that also fails. sigh. I'm also struggling to make Sieve work. I've produced a sysreport (see: https://arix.com/tmp/dovecot-sysreport-mail.arix.com-1757611127.tar.gz) and you'll find my config file below: please help? # 2.3.21.1 (d492236fa0): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.21.1 (49005e73) # OS: Linux 6.15.9-201.fc42.x86_64 x86_64 Fedora release 42 (Adams) # Hostname: mail.arix.com first_valid_uid = 1000 mail_debug = yes mail_location = maildir:~/mail:LAYOUT=fs managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;asc ii-numeric relational regex imap4flags copy include body enotify environment mailbox date index ihave duplicat e mime foreverypart extracttext mbox_write_locks = fcntl namespace inbox { inbox = yes location = mailbox "Deleted Messages" { special_use = \Trash } mailbox Drafts { special_use = \Drafts } mailbox Junk { special_use = \Junk } mailbox Sent { special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } prefix = INBOX/ separator = / } passdb { driver = pam } plugin { sieve = file:~/sieve;active=~/.dovecot.sieve sieve_before = /var/lib/dovecot/sieve/global sieve_execute_bin_dir = /usr/lib/dovecot/sieve-execute sieve_global_extensions = +vnd.dovecot.execute +vnd.dovecot.environment +variables sieve_plugins = sieve_extprograms sieve_trace_debug = yes sieve_trace_dir = /tmp/sieve sieve_trace_level = matching } protocols = imap pop3 lmtp sieve service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0660 user = postfix } } service lmtp { inet_listener lmtp { address = localhost port = 24 } ssl = required ssl_cert = </etc/letsencrypt/live/mail.arix.com/fullchain.pem ssl_cipher_list = PROFILE=SYSTEM ssl_key = # hidden, use -P to show it userdb { driver = passwd } protocol sieve { mail_plugins = " sieve" } > On Sep 11, 2025, at 10:45, dovecot-request(a)dovecot.org wrote: > > Welcome to the "dovecot" mailing list! > > To post to this list, send your message to: > > dovecot(a)dovecot.org > > You can unsubscribe or make adjustments to your options via email by > sending a message to: > > dovecot-request(a)dovecot.org > > with the word 'help' in the subject or body (don't include the > quotes), and you will get back a message with instructions. You will > need your password to change your options, but for security purposes, > this password is not included here. If you have forgotten your > password you will need to reset it via the web UI. hi. I'm running on Fedora 42 and want to hide the Deleted Messages folder (because I want to use Trash instead). unfortunately this fails: mailbox "Deleted Messages" { hidden = yes } which I understand depends on the "mailbox" plugin. however, when I look in /var/lib64/dovecot, I don't see any such plugin. I also cannot find in the repositories any RPM that provides it. I understand it may be baked into the core binary but if so, enabling it should work, and yet if I do enable it, I get the error below: Sep 11 10:06:01 mail dovecot[739762]: imap(ekkis): Error: Plugin 'mailbox' not found from directory /usr/lib64/dovecot I would also like to use the alias_for but that also fails. sigh. I'm also struggling to make Sieve work. I've produced a sysreport (see: https://arix.com/tmp/dovecot-sysreport-mail.arix.com-1757611127.tar.gz) and you'll find my config file below: please help? # 2.3.21.1 (d492236fa0): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.21.1 (49005e73) # OS: Linux 6.15.9-201.fc42.x86_64 x86_64 Fedora release 42 (Adams) # Hostname: mail.arix.com first_valid_uid = 1000 mail_debug = yes mail_location = maildir:~/mail:LAYOUT=fs managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;asc ii-numeric relational regex imap4flags copy include body enotify environment mailbox date index ihave duplicat e mime foreverypart extracttext mbox_write_locks = fcntl namespace inbox { inbox = yes location = mailbox "Deleted Messages" { special_use = \Trash } mailbox Drafts { special_use = \Drafts } mailbox Junk { special_use = \Junk } mailbox Sent { special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } prefix = INBOX/ separator = / } passdb { driver = pam } plugin { sieve = file:~/sieve;active=~/.dovecot.sieve sieve_before = /var/lib/dovecot/sieve/global sieve_execute_bin_dir = /usr/lib/dovecot/sieve-execute sieve_global_extensions = +vnd.dovecot.execute +vnd.dovecot.environment +variables sieve_plugins = sieve_extprograms sieve_trace_debug = yes sieve_trace_dir = /tmp/sieve sieve_trace_level = matching } protocols = imap pop3 lmtp sieve service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0660 user = postfix } } service lmtp { inet_listener lmtp { address = localhost port = 24 } ssl = required ssl_cert = </etc/letsencrypt/live/mail.arix.com/fullchain.pem ssl_cipher_list = PROFILE=SYSTEM ssl_key = # hidden, use -P to show it userdb { driver = passwd } protocol sieve { mail_plugins = " sieve" } On Sep 11, 2025, at 10:45, dovecot-request(a)dovecot.org wrote: Welcome to the "dovecot" mailing list! To post to this list, send your message to: dovecot(a)dovecot.org You can unsubscribe or make adjustments to your options via email by sending a message to: dovecot-request(a)dovecot.org with the word 'help' in the subject or body (don't include the quotes), and you will get back a message with instructions. You will need your password to change your options, but for security purposes, this password is not included here. If you have forgotten your password you will need to reset it via the web UI.

2 2

library error
by Mihai Badici 11 Sep '25

11 Sep '25

I try to configure a public folder with acl on debian trixie . 2.4.1-4 (7d8c0e5759): /etc/dovecot/dovecot.conf # Pigeonhole version 2.4.1-4 (0a86619f) # OS: Linux 6.12.41+deb13-amd64 x86_64 Debian 13.1 If I don't enable imap_acl there are no acl's which seems legit. After enabling imap_acl ( mail_plugins = acl quota imap_acl) I can set acl's but I have this error: Fatal: Couldn't load required plugin /usr/lib/dovecot/modules/lib02_imap_acl_plugin.so: dlopen() failed: /usr/lib/dovecot/modules/lib02_imap_acl_plugin.so: undefined symbol: imap_list_return_flag_unregister I'm not sure if this can be a packaging error with the wrong version as it looks, a missing library or a bug... or maybe a missing parameter? If i run ldd on this .so there is no library missing: ldd /usr/lib/dovecot/modules/lib02_imap_acl_plugin.so linux-vdso.so.1 (0x00007fcfbfab3000) lib01_acl_plugin.so => /usr/lib/dovecot/modules/lib01_acl_plugin.so (0x00007fcfbfa8a000) libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007fcfbf88b000) /lib64/ld-linux-x86-64.so.2 (0x00007fcfbfab5000) Thanks, Mihai Bădici I try to configure a public folder with acl on debian trixie . 2.4.1-4 (7d8c0e5759): /etc/dovecot/dovecot.conf # Pigeonhole version 2.4.1-4 (0a86619f) # OS: Linux 6.12.41+deb13-amd64 x86_64 Debian 13.1 If I don't enable imap_acl there are no acl's which seems legit. After enabling imap_acl ( mail_plugins = acl quota imap_acl) I can set acl's but I have this error: Fatal: Couldn't load required plugin /usr/lib/dovecot/modules/lib02_imap_acl_plugin.so: dlopen() failed: /usr/lib/dovecot/modules/lib02_imap_acl_plugin.so: undefined symbol: imap_list_return_flag_unregister I'm not sure if this can be a packaging error with the wrong version as it looks, a missing library or a bug... or maybe a missing parameter? If i run ldd on this .so there is no library missing: ldd /usr/lib/dovecot/modules/lib02_imap_acl_plugin.so linux-vdso.so.1 (0x00007fcfbfab3000) lib01_acl_plugin.so => /usr/lib/dovecot/modules/lib01_acl_plugin.so (0x00007fcfbfa8a000) libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007fcfbf88b000) /lib64/ld-linux-x86-64.so.2 (0x00007fcfbfab5000) Thanks, Mihai Badici

1 0

SMTPUTF8 - what's the status?
by Kamil Jońca 11 Sep '25

11 Sep '25

Does dovecot LMTP can process SMTPUTF8 emails? I guess not, but I want to confirm. KJ -- http://wolnelektury.pl/wesprzyj/teraz/ <kira> is a surgical war where you go give the foreign troops nose jobs?

2 1

Re: SMTPUTF8 - what's the status?
by Michael Slusarz 11 Sep '25

11 Sep '25

> On 09/11/2025 10:53 AM MDT Kamil Jońca via dovecot <dovecot(a)dovecot.org> wrote: > > Does dovecot LMTP can process SMTPUTF8 emails? > I guess not, but I want to confirm. https://doc.dovecot.org/2.4.1/core/summaries/settings.html#mail_utf8_extens… Requires --enable-experimental-mail-utf8 when compiling. michael

1 0

Sieve Scripts via SQL Dicts in Dovecot 2.4 not working?
by Niklas Meyer 11 Sep '25

11 Sep '25

Hello everyone, I am currently working on porting the Dovecot 2.4 configuration from the latest 2.3 version. During this process, I encountered issues with the Sieve filters, particularly those related to SQL dict mappings. The previous (2.3) configuration looked like this and worked: |map { pattern = priv/sieve/name/$script_nametable = sieve_before username_field = username value_field = idfields { script_name = $script_name} } map { pattern = priv/sieve/data/$idtable = sieve_before username_field = username value_field = script_data fields { id= $id} } | This resulted in the following SQL queries on the MySQL server: |2025-08-1511:01:29.237511SELECTid FROMsieve_after WHEREscript_name ='active'ANDusername ='frittenjonas(a)derlinkman.de'2025-08-1511:01:29.236416SELECTid FROMsieve_before WHEREscript_name ='active'ANDusername ='frittenjonas(a)derlinkman.de'| As you can see, there are SQL mappings for |sieve_before| and |sieve_after|, alongside a local file loaded prior to the SQL settings, as they are user-based. In Dovecot 2.3, everything worked and the scripts were executed. In 2.4, however, they no longer run. I adapted the configuration for dict SQL mapping for Sieve filters according to the documentation: |dict_mappriv/sieve/name/$script_name{ sql_table= sieve_before username_field = username value_field id { } # The script name field in the table to querykey_fieldscript_name { value= $script_name} } dict_map priv/sieve/data/$id{ sql_table= sieve_before username_field = username value_field script_data { } key_fieldid { value= $id} } | This also results in the dict proxy querying the database with the same pattern as before: |2025-08-1511:11:47.175184SELECTid FROMsieve_after WHEREscript_name ='active'ANDusername ='frittenjonas(a)derlinkman.de'2025-08-1511:11:47.172952SELECTid FROMsieve_before WHEREscript_name ='active'ANDusername ='frittenjonas(a)derlinkman.de'2025-08-1511:11:47.155786SELECTid FROMsieve_after WHEREscript_name ='active'ANDusername ='frittenjonas(a)derlinkman.de'2025-08-1511:11:47.136030SELECTid FROMsieve_before WHEREscript_name ='active'ANDusername ='frittenjonas(a)derlinkman.de'| However, unlike in 2.3, it now queries the DB twice. In the Sieve debug logs, I see the following: https://pastebin.com/PTKkLsDQ Notably: |Aug 1512:22:2443664c142e0a dovecot: lmtp(frittenjonas(a)derlinkman.de)<2407><mPFNN2AKn2hnCQAAhwrv7A>: Debug: Localdelivery failed: Temporarily unable toaccessnecessary Sieve scripts | This line concerns me. Here are the current Sieve script declarations: |sieve_script before{ type= beforedriver = file path= /var/vmail/sieve/global_sieve_before.sieve } sieve_script before2 { type= beforedriver = dict name= active dict proxy { name= sieve_before sieve_script_bin_path = /var/vmail/sieve_before_bindir } } sieve_script after{ type= afterdriver = file path= /var/vmail/sieve/global_sieve_after.sieve } sieve_script after2 { type= afterdriver = dict name= active dict proxy { name= sieve_after sieve_script_bin_path = /var/vmail/sieve_after_bindir } } # Personal scripts sieve_script personal { type= personal driver = file path= ~/sieve active_path = ~/.dovecot.sieve } | The dict proxy configuration, pointing to the dict_map SQL query above, looks like this: |dict sieve_after { driver = sql!include/etc/dovecot/sql/dovecot-dict-sql-sieve_after.conf } dict sieve_before { driver = sql!include/etc/dovecot/sql/dovecot-dict-sql-sieve_before.conf } | Thanks for your guidance. Kind regards Niklas Meyer Maintainer of the mailcow project Hello everyone, I am currently working on porting the Dovecot 2.4 configuration from the latest 2.3 version. During this process, I encountered issues with the Sieve filters, particularly those related to SQL dict mappings. The previous (2.3) configuration looked like this and worked: map { pattern = priv/sieve/name/$script_name table = sieve_before username_field = username value_field = id fields { script_name = $script_name } } map { pattern = priv/sieve/data/$id table = sieve_before username_field = username value_field = script_data fields { id = $id } } This resulted in the following SQL queries on the MySQL server: 2025-08-15 11:01:29.237511 SELECT id FROM sieve_after WHERE script_name = 'active' AND username = '[1]frittenjonas(a)derlinkman.de' 2025-08-15 11:01:29.236416 SELECT id FROM sieve_before WHERE script_name = 'active' AND username = '[2]frittenjonas(a)derlinkman.de' As you can see, there are SQL mappings for sieve_before and sieve_after, alongside a local file loaded prior to the SQL settings, as they are user-based. In Dovecot 2.3, everything worked and the scripts were executed. In 2.4, however, they no longer run. I adapted the configuration for dict SQL mapping for Sieve filters according to the documentation: dict_map priv/sieve/name/$script_name { sql_table = sieve_before username_field = username value_field id { } # The script name field in the table to query key_field script_name { value = $script_name } } dict_map priv/sieve/data/$id { sql_table = sieve_before username_field = username value_field script_data { } key_field id { value = $id } } This also results in the dict proxy querying the database with the same pattern as before: 2025-08-15 11:11:47.175184 SELECT id FROM sieve_after WHERE script_name = 'active' AND username = '[3]frittenjonas(a)derlinkman.de' 2025-08-15 11:11:47.172952 SELECT id FROM sieve_before WHERE script_name = 'active' AND username = '[4]frittenjonas(a)derlinkman.de' 2025-08-15 11:11:47.155786 SELECT id FROM sieve_after WHERE script_name = 'active' AND username = '[5]frittenjonas(a)derlinkman.de' 2025-08-15 11:11:47.136030 SELECT id FROM sieve_before WHERE script_name = 'active' AND username = '[6]frittenjonas(a)derlinkman.de' However, unlike in 2.3, it now queries the DB twice. In the Sieve debug logs, I see the following: [7]https://pastebin.com/PTKkLsDQ Notably: Aug 15 12:22:24 43664c142e0a dovecot: lmtp([8]frittenjonas(a)derlinkman.de)<2407><mPFNN2AKn2hnCQAAhwrv7A>: Debug: Local delivery failed: Temporarily unable to access necessary Sieve scripts This line concerns me. Here are the current Sieve script declarations: sieve_script before { type = before driver = file path = /var/vmail/sieve/global_sieve_before.sieve } sieve_script before2 { type = before driver = dict name = active dict proxy { name = sieve_before sieve_script_bin_path = /var/vmail/sieve_before_bindir } } sieve_script after { type = after driver = file path = /var/vmail/sieve/global_sieve_after.sieve } sieve_script after2 { type = after driver = dict name = active dict proxy { name = sieve_after sieve_script_bin_path = /var/vmail/sieve_after_bindir } } # Personal scripts sieve_script personal { type = personal driver = file path = ~/sieve active_path = ~/.dovecot.sieve } The dict proxy configuration, pointing to the dict_map SQL query above, looks like this: dict sieve_after { driver = sql !include /etc/dovecot/sql/dovecot-dict-sql-sieve_after.conf } dict sieve_before { driver = sql !include /etc/dovecot/sql/dovecot-dict-sql-sieve_before.conf } Thanks for your guidance. Kind regards Niklas Meyer Maintainer of the mailcow project References Visible links 1. mailto:frittenjonas@derlinkman.de 2. mailto:frittenjonas@derlinkman.de 3. mailto:frittenjonas@derlinkman.de 4. mailto:frittenjonas@derlinkman.de 5. mailto:frittenjonas@derlinkman.de 6. mailto:frittenjonas@derlinkman.de 7. https://pastebin.com/PTKkLsDQ 8. mailto:frittenjonas@derlinkman.de

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