November 2025 - dovecot

19 Mar '26

I am getting this error. This file does not exist. Error: t_readlink(/xxxxxx/dbox-alt-root) failed: readlink() failed: Permission denied

2 4

LDAP AD Quota override not working
by wt.forsaken＠gmail.com 26 Feb '26

26 Feb '26

Hi there, I'm testing the new version of Dovecot 2.4 in Debian 13 before upgrading to my customers and I'm having difficult on trying to override the user's quota. The LDAP base is from Samba4 AD and having been trying the following configuration: auth-ldap.conf.ext: ldap_uris = ldap://localhost ldap_auth_dn = cn=admin,dc=localdomain ldap_auth_dn_password = password ldap_base = ou=users, dc=localdomain passdb ldap { filter = (&(objectClass=person)(sAMAccountName=%{user})) bind = yes fields { userdb_quota_storage_size = %{ldap:telephoneNumber}B } } userdb prefetch { driver = prefetch } userdb ldap { fields { quota_storage_size = %{ldap:telephoneNumber}B } } 90-quota.conf mail_plugins { quota = yes } quota "User quota" { } quota_storage_size = 40M Since there is no quotaBytes in Samba AD, I'm testing to map the telephoneNumber parameters to override the quota, also I'm just testing a 40M to see how it works. Roundcube webmail can see the quota being overriden in its inferior bar, but when I send an email to the user which is above the quota, the journal log inform "failed to store into mailbox 'INBOX': Quota exceeded (mailbox for user is full)". I don't know how to override the quota, since in passdb section I used the "userdb_" prefix but it is not being passed to userdb when I input the "doveadm user ..." command. I don't know if I have been clear in my request, but I'd appreciate any help.

3 3

2.4.2 breaks user iterations for LDAP
by cpfeiffer＠rev-crew.info 20 Feb '26

20 Feb '26

Hello everyone, Due to the fix for CVE-2025-30189, routines like userdb_ldap_preinit() call auth_cache_parse_key_and_fields() unconditionally, with the eventually called auth_cache_parse_key_exclude() erroring if a cache key could not be constructed. It’s also noteworthy that this call happens regardless of whether use_cache is set or not, and as of such failing to construct a cache key would cause an error even if use_cache = no was set for that database. This is however an issue for user iteration with LDAP, as documented here LDAP | Dovecot CE <https://doc.dovecot.org/2.4.2/core/config/auth/databases/ldap.html#user-ite…> . Such a userdb only has iterate_filter fields that would inherently not be containing any user variables. The call to auth_cache_parse_key_and_fields() uses a combination of ldap_base and userdb_ldap_filter anyway (so whatever is in iterate_filter isn’t considered), and for an iteration userdb as described in the documentation, the latter would be empty. Alas, I ended up getting the rather confusing error * auth: Fatal: auth-cache: dc=rev-crew,dc=info: Cache key must contain at least one variable With dc=rev-crew,dc=info being my ldap_base setting for the iteration userdb. I’m not critically dependent on the user iteration, so I’ve commented the userdb out for now, but this would need fixing. Regards, Christian Pfeiffer Hello everyone, Due to the fix for CVE-2025-30189, routines like userdb_ldap_preinit() call auth_cache_parse_key_and_fields() unconditionally, with the eventually called auth_cache_parse_key_exclude() erroring if a cache key could not be constructed. It's also noteworthy that this call happens regardless of whether use_cache is set or not, and as of such failing to construct a cache key would cause an error even if use_cache = no was set for that database. This is however an issue for user iteration with LDAP, as documented here [1]LDAP | Dovecot CE. Such a userdb only has iterate_filter fields that would inherently not be containing any user variables. The call to auth_cache_parse_key_and_fields() uses a combination of ldap_base and userdb_ldap_filter anyway (so whatever is in iterate_filter isn't considered), and for an iteration userdb as described in the documentation, the latter would be empty. Alas, I ended up getting the rather confusing error o auth: Fatal: auth-cache: dc=rev-crew,dc=info: Cache key must contain at least one variable With dc=rev-crew,dc=info being my ldap_base setting for the iteration userdb. I'm not critically dependent on the user iteration, so I've commented the userdb out for now, but this would need fixing. Regards, Christian Pfeiffer References Visible links 1. https://doc.dovecot.org/2.4.2/core/config/auth/databases/ldap.html#user-ite…

4 5

"Synchronization corrupted index header" with mdbox: thousands of deleted e-mails reappeared in INBOX
by Ákos Szőts 17 Feb '26

17 Feb '26

Hi everyone, Suddenly, the following messages appeared in my Dovecot error log: master: Warning: Killed with signal 15 (by pid=0 uid=0 code=kill) Error: Mailbox Trash: Synchronization corrupted index header [...]/Trash/dbox-Mails/dovecot.index: uidvalidity=0, but next_uid=73 Warning: Mailbox Trash: fscking index file [...]/Trash/dbox-Mails/dovecot.index Warning: mdbox([...]/mail/storage): rebuilding indexes: Mailbox Trash index was fsck'd Warning: mdbox([...]/mail/storage): fscking index file [...]/index/inbox/storage/dovecot.map.index Error: Mailbox INBOX: [...]/INBOX/dbox-Mails/dovecot.index reset, view is now inconsistent The first message is because I restarted the container. Since then, Thunderbird shows thousands of previously deleted e-mails again in INBOX where all my messages are marked as unread. - Do you know what can cause it and how can I avoid to happen again? - Is the used mdbox storage engine that fragile? Is the fault tolerance of other engines better? I have a backup from some days ago. Is it possible to somehow revert back to it and sync the new e-mails on top of those? Version: 2.4.2. Thank you, Ákos

2 1

2.4.2 breaks big-endian builds
by Noah Meyerhans 19 Jan '26

19 Jan '26

From the Debian s390 build log, no merging parent is NULL ............................................ : ok no merging parent sent to stats ...................................... : ok no merging parent timestamp differs .................................. : ok merge events parent NULL ............................................. : ok merge events parent sent to stats .................................... : ok skip empty parents ................................................... : ok merge events and skip empty parents .................................. : ok parent updated after send ............................................ : ok large event id ....................................................... : ok merge events global .................................................. : ok 0 / 10 tests failed test-master-service-settings.c:472: Assert(#16) failed: strstr(error, tests[i].error) != NULL test-master-service-settings: Error: Failed to parse configuration: Settings block doesn't end with NUL at offset 70 test-master-service-settings.c:472: Assert(#19) failed: strstr(error, tests[i].error) != NULL test-master-service-settings: Error: Failed to parse configuration: Settings block doesn't end with NUL at offset 84 master_service_settings_read() - binary corruption ................... : FAILED 1 / 1 tests failed make[4]: *** [Makefile:958: check-local] Error 1 make[4]: Leaving directory '/build/reproducible-path/dovecot-2.4.2+dfsg1/src/lib-master' make[3]: *** [Makefile:806: check-am] Error 2 make[3]: Leaving directory '/build/reproducible-path/dovecot-2.4.2+dfsg1/src/lib-master' make[2]: *** [Makefile:604: check-recursive] Error 1 make[2]: Leaving directory '/build/reproducible-path/dovecot-2.4.2+dfsg1/src' make[1]: *** [Makefile:739: check-recursive] Error 1 make[1]: Leaving directory '/build/reproducible-path/dovecot-2.4.2+dfsg1' The build failure was introduced with commit 41bd7a502 ("lib-settings, config: Use native CPU endianess in binary config file"). The build is successful at the previous commit, but fails at that commit. I haven't yet determined whether the failure is with the code itself or the test. Full build log is available at https://buildd.debian.org/status/fetch.php?pkg=dovecot&arch=s390x&ver=1%3A2… noah

2 2

Panic: file imap-sieve-storage.c: line 216 (imap_sieve_add_mailbox_event): assertion failed: (ismt->src_box == NULL || ismt->src_box == src_box)
by Thomas 03 Dec '25

03 Dec '25

Hello, I'm new to dovecot and greet everyone! I come from courier-imap and updated my imap server now to dovecot-2.4.2. All user directories and files were copied 1:1. In some cases, I now receive the following message in logfiles: 2025-11-28 15:20:52.184760182 Nov 28 15:20:52 imap(Email_address_hidden)<2297539><zNQfVqhEx98l90IK>: Error: Raw backtrace: libdovecot.so.0(backtrace_append+0x39) [0x7f8eb793ab09] -> libdovecot.so.0(backtrace_get+0x22) [0x7f8eb793ac42] -> libdovecot.so.0(+0x1493fc) [0x7f8eb79493fc] -> libdovecot.so.0(+0x149491) [0x7f8eb7949491] -> libdovecot.so.0(+0x6bde2) [0x7f8eb786bde2] -> lib95_imap_sieve_plugin.so(+0x49b7) [0x7f8eb74bb9b7] -> lib95_imap_sieve_plugin.so(+0x7c8b) [0x7f8eb74bec8b] -> libdovecot-storage.so.0(index_mail_free+0xe) [0x7f8eb7cb4c9e] -> lib95_imap_sieve_plugin.so(+0x6ef5) [0x7f8eb74bdef5] -> libdovecot-storage.so.0(mail_free+0x1a) [0x7f8eb7c29bca] -> libdovecot-storage.so.0(+0xf5c52) [0x7f8eb7cc7c52] -> libdovecot-storage.so.0(mail_index_transaction_commit_full+0x8c) [0x7f8eb7ce11ec] -> libdovecot-storage.so.0(index_transaction_commit+0xf2) [0x7f8eb7cc81f2] -> libdovecot-storage.so.0(+0xcff1e) [0x7f8eb7ca1f1e] -> lib95_imap_sieve_plugin.so(+0x8576) [0x7f8eb74bf576] -> lib15_notify_plugin.so(+0x368f) [0x7f8eb7bc668f] -> lib10_quota_plugin.so(+0xd99d) [0x7f8eb74d999d] -> libdovecot-storage.so.0(mailbox_transaction_commit_get_changes+0x79) [0x7f8eb7c3bac9] -> imap(+0x1762b) [0x562bf69c462b] -> imap(command_exec+0xa4) [0x562bf69d3334] -> imap(+0x24180) [0x562bf69d1180] -> imap(+0x24214) [0x562bf69d1214] -> imap(+0x2449b) [0x562bf69d149b] -> imap(client_handle_input+0x1c5) [0x562bf69d1675] -> imap(client_input+0x73) [0x562bf69d1c33] -> libdovecot.so.0(io_loop_call_io+0x67) [0x7f8eb7960187] -> libdovecot.so.0(io_loop_handler_run_internal+0x12a) [0x7f8eb79618ba] -> libdovecot.so.0(io_loop_handler_run+0x51) [0x7f8eb7960231] -> libdovecot.so.0(io_loop_run+0x48) [0x7f8eb7960408] -> libdovecot.so.0(master_service_run+0x19e) [0x7f8eb78b011e] 2025-11-28 15:20:52.940692672 Nov 28 15:20:52 imap(Email_address_hiddene)<2297539><zNQfVqhEx98l90IK>: Fatal: master: service(imap): child 2297539 killed with signal 6 (core dumped) If I filter for "Panic" now I see: 2025-11-28 15:20:52.183676628 Nov 28 15:20:52 imap(Email_address_hidden)<2297539><zNQfVqhEx98l90IK>: Panic: file imap-sieve-storage.c: line 216 (imap_sieve_add_mailbox_event): assertion failed: (ismt->src_box == NULL || ismt->src_box == src_box) Panic repeats up to several times. In moment of crash I can find lots [# of repeats] of copies of ONE mail file in users .Trash/tmp dir. Original mail file also in e.g. INBOX/cur Please tell me wht's going on here. I checked all permission, dirs and so on. CentOS 10 s/qmail dovecot-2.4.2 dovecot-pigeonhole-2.4.2 Regards, Thomas

2 3

managesieve-crash on 2.4.2
by Bjoern Franke 29 Nov '25

29 Nov '25

Hi, while trying to connect with "sieve-connect", managesieve crashed: Nov 25 14:21:08 mail.schafweide.org dovecot[440904]: managesieve-login: Panic: file client.c: line 350 (managesieve_client_input_next_cmd): assertion failed: (args != NULL) Nov 25 14:21:08 mail.schafweide.org systemd-coredump[440938]: [🡕] Process 440934 (managesieve-log) of user 74 dumped core. Stack trace of thread 440934: #0 0x000079c6cfa9890c n/a (libc.so.6 + 0x9890c) #1 0x000079c6cfa3e3a0 raise (libc.so.6 + 0x3e3a0) #2 0x000079c6cfa2557a abort (libc.so.6 + 0x2557a) #3 0x000079c6cfe5ffff n/a (libdovecot.so.0 + 0x5ffff) #4 0x000079c6cff4f095 n/a (libdovecot.so.0 + 0x14f095) #5 0x000079c6cfe5feb6 i_panic (libdovecot.so.0 + 0x5feb6) #6 0x000062e017df80de n/a (/usr/lib/dovecot/managesieve-login + 0x30de) #7 0x000062e017df8887 n/a (/usr/lib/dovecot/managesieve-login + 0x3887) #8 0x000079c6cff681f4 io_loop_call_io (libdovecot.so.0 + 0x1681f4) #9 0x000079c6cff6a2db io_loop_handler_run_internal (libdovecot.so.0 + 0x16a2db) #10 0x000079c6cff6a397 io_loop_handler_run (libdovecot.so.0 + 0x16a397) #11 0x000079c6cff6a599 io_loop_run (libdovecot.so.0 + 0x16a599) #12 0x000079c6cfeabce1 master_service_run (libdovecot.so.0 + 0xabce1) #13 0x000079c6d02f4350 login_binary_run (libdovecot-login.so.0 + 0x14350) #14 0x000079c6cfa27635 n/a (libc.so.6 + 0x27635) #15 0x000079c6cfa276e9 __libc_start_main (libc.so.6 + 0x276e9) #16 0x000062e017df8405 n/a (/usr/lib/dovecot/managesieve-login + 0x3405) ELF object binary architecture: AMD x86-64 Nov 25 14:21:08 mail.schafweide.org dovecot[440904]: managesieve-login: Fatal: master: service(managesieve-login): child 440934 killed with signal 6 (core dumped) I'm using dovecot/pigeonhole 2.4.2 on Arch. Regards Bjoern

3 7

"Mailbox attribute iteration failed": error running doveadm sync
by jamie＠mayfirst.org 29 Nov '25

29 Nov '25

I'm running doveadm sync to sync a remote mailbox over ssh (the remote server is running 2.3.13) with a local mailbox (the local server is running 2.4.1). I get the following errors: Error: brain M: Exporting mailbox INBOX failed: Mailbox attribute iteration failed: Internal error occurred. Refer to server log for more information. [2025-11-15 19:25:32] Error: cmd sync: Remote command returned error 75: ssh root(a)mailstore002.mayfirst.org doveadm dsync-server -u jamie-test dsync-server Does anyone have suggestions on how to fix? Also, any tips on how to increase logging verbosity would be great - I'm not getting anything in the logs. Here is the full transcript of the errors. Thanks for any suggestions! jamie Debug: Loading modules from directory: /usr/lib/dovecot/modules/doveadm Debug: Skipping module doveadm_acl_plugin, because dlopen() failed: /usr/lib/dovecot/modules/doveadm/lib10_doveadm_acl_plugin.so: undefined symbol: acl_user_module (this is usually intentional, so just ignore this message) Debug: Skipping module doveadm_quota_plugin, because dlopen() failed: /usr/lib/dovecot/modules/doveadm/lib10_doveadm_quota_plugin.so: undefined symbol: quota_user_module (this is usually intentional, so just ignore this message) Debug: Module loaded: /usr/lib/dovecot/modules/doveadm/lib10_doveadm_sieve_plugin.so Debug: Skipping module doveadm_fts_plugin, because dlopen() failed: /usr/lib/dovecot/modules/doveadm/lib20_doveadm_fts_plugin.so: undefined symbol: fts_backend_rescan (this is usually intentional, so just ignore this message) Debug: Skipping module doveadm_fts_flatcurve_plugin, because dlopen() failed: /usr/lib/dovecot/modules/doveadm/libdoveadm_fts_flatcurve_plugin.so: undefined symbol: fts_flatcurve_user_module (this is usually intentional, so just ignore this message) Debug: Skipping module doveadm_mail_crypt_plugin, because dlopen() failed: /usr/lib/dovecot/modules/doveadm/libdoveadm_mail_crypt_plugin.so: undefined symbol: crypt_acl_setting_parser_info (this is usually intentional, so just ignore this message) Nov 15 19:28:47 Debug: Loading modules from directory: /usr/lib/dovecot/modules/doveadm Nov 15 19:28:47 Debug: Skipping module doveadm_acl_plugin, because dlopen() failed: /usr/lib/dovecot/modules/doveadm/lib10_doveadm_acl_plugin.so: undefined symbol: acl_user_module (this is usually intentional, so just ignore this message) Nov 15 19:28:47 Debug: Skipping module doveadm_quota_plugin, because dlopen() failed: /usr/lib/dovecot/modules/doveadm/lib10_doveadm_quota_plugin.so: undefined symbol: quota_user_module (this is usually intentional, so just ignore this message) Nov 15 19:28:47 Debug: Skipping module doveadm_fts_plugin, because dlopen() failed: /usr/lib/dovecot/modules/doveadm/lib20_doveadm_fts_plugin.so: undefined symbol: fts_backend_rescan (this is usually intentional, so just ignore this message) Nov 15 19:28:47 Debug: Skipping module doveadm_fts_flatcurve_plugin, because dlopen() failed: /usr/lib/dovecot/modules/doveadm/libdoveadm_fts_flatcurve_plugin.so: undefined symbol: fts_flatcurve_user_module (this is usually intentional, so just ignore this message) Nov 15 19:28:47 Debug: Skipping module doveadm_mail_crypt_plugin, because dlopen() failed: /usr/lib/dovecot/modules/doveadm/libdoveadm_mail_crypt_plugin.so: undefined symbol: crypt_acl_setting_parser_info (this is usually intentional, so just ignore this message) Nov 15 19:28:47 doveadm(jamie-test)<46454><>: Debug: auth-master: userdb lookup(jamie-test): Started userdb lookup Nov 15 19:28:47 doveadm(jamie-test)<46454><>: Debug: auth-master: conn unix:/run/dovecot/auth-userdb: Connecting Nov 15 19:28:47 doveadm(jamie-test)<46454><>: Debug: auth-master: conn unix:/run/dovecot/auth-userdb (pid=43923,uid=0): Client connected (fd=9) Nov 15 19:28:47 doveadm(jamie-test)<46454><>: Debug: auth-master: conn unix:/run/dovecot/auth-userdb (pid=43923,uid=0): auth input: jamie-test system_groups_user=jamie-test uid=1002 home=/home/users/jamie-test gid=100 Nov 15 19:28:47 doveadm(jamie-test)<46454><>: Debug: auth-master: userdb lookup(jamie-test): auth USER input: jamie-test system_groups_user=jamie-test uid=1002 home=/home/users/jamie-test gid=100 Nov 15 19:28:47 doveadm(jamie-test)<46454><>: Debug: auth-master: userdb lookup(jamie-test): Finished userdb lookup (username=jamie-test system_groups_user=jamie-test uid=1002 home=/home/users/jamie-test gid=100) Nov 15 19:28:47 doveadm(jamie-test): Debug: Effective uid=1002, gid=100, home=/home/users/jamie-test Nov 15 19:28:47 doveadm(jamie-test): Debug: open(/proc/self/io) failed: Permission denied (euid=1002(jamie-test) egid=100(users) missing +r perm: /proc/self/io) Nov 15 19:28:47 doveadm(jamie-test): Debug: Namespace inbox: type=private, prefix=INBOX., sep=., inbox=yes, hidden=no, list=yes, subscriptions=yes Nov 15 19:28:47 doveadm(jamie-test): Debug: maildir++: root=/home/users/jamie-test/Maildir, index=, indexpvt=, control=, inbox=/home/users/jamie-test/Maildir, alt= Nov 15 19:28:47 doveadm(jamie-test): Debug: Namespace : type=private, prefix=, sep=, inbox=no, hidden=yes, list=no, subscriptions=no Nov 15 19:28:47 doveadm(jamie-test): Debug: none: root=/home/users/jamie-test/Maildir, index=, indexpvt=, control=, inbox=/home/users/jamie-test/Maildir, alt= Nov 15 19:28:47 doveadm(jamie-test): Debug: brain M: Namespace inbox has path /home/users/jamie-test/Maildir Nov 15 19:28:47 doveadm(jamie-test): Debug: Mailbox INBOX: Mailbox opened Nov 15 19:28:47 doveadm(jamie-test): Debug: Mailbox INBOX: Mailbox opened Nov 15 19:28:47 doveadm(jamie-test): Debug: Namespace inbox: Using permissions from /home/users/jamie-test/Maildir: mode=0700 gid=default Nov 15 19:28:47 dsync-local(jamie-test)<esqfB2/UGGl2tQAAVqcyLg>: Debug: brain M: Local mailbox tree: INBOX guid=c06cb11ffc3b2e667cee07009334e653 uid_validity=1669914524 uid_next=1 subs=no last_change=0 last_subs=0 Nov 15 19:28:47 dsync-local(jamie-test)<esqfB2/UGGl2tQAAVqcyLg>: Debug: brain M: Local mailbox tree: INBOX.Spam guid=00000000000000000000000000000000 uid_validity=0 uid_next=0 subs=yes last_change=0 last_subs=1763215050 Nov 15 19:28:47 dsync-local(jamie-test)<esqfB2/UGGl2tQAAVqcyLg>: Debug: brain M: Local mailbox tree: INBOX.Sent guid=00000000000000000000000000000000 uid_validity=0 uid_next=0 subs=yes last_change=0 last_subs=1763215050 Nov 15 19:28:47 dsync-local(jamie-test)<esqfB2/UGGl2tQAAVqcyLg>: Debug: brain M: Local mailbox tree: INBOX.Archive guid=e42d3631a91ba85ef96f00000df6ea83 uid_validity=1586118770 uid_next=1 subs=yes last_change=0 last_subs=1763215050 Nov 15 19:28:47 dsync-local(jamie-test)<esqfB2/UGGl2tQAAVqcyLg>: Debug: brain M: Local mailbox tree: INBOX.Archives guid=693e80288e6e8b5e153300000df6ea83 uid_validity=1586118767 uid_next=1 subs=no last_change=0 last_subs=0 Nov 15 19:28:47 dsync-local(jamie-test)<esqfB2/UGGl2tQAAVqcyLg>: Debug: brain M: Local mailbox tree: INBOX.Drafts guid=60042a30bf3e5e64d44f15001890bc3b uid_validity=1669914525 uid_next=1 subs=yes last_change=0 last_subs=1763215050 Nov 15 19:28:47 dsync-local(jamie-test)<esqfB2/UGGl2tQAAVqcyLg>: Debug: brain M: Local mailbox tree: INBOX.Junk guid=387dc412e591b0683b3b34009334e653 uid_validity=1714306055 uid_next=1 subs=yes last_change=0 last_subs=1763215050 Nov 15 19:28:47 dsync-local(jamie-test)<esqfB2/UGGl2tQAAVqcyLg>: Debug: brain M: Local mailbox tree: INBOX.Keep Forever guid=99b2cc1be0826d61f07e00000df6ea83 uid_validity=1586118773 uid_next=1 subs=yes last_change=0 last_subs=1763215050 Nov 15 19:28:47 dsync-local(jamie-test)<esqfB2/UGGl2tQAAVqcyLg>: Debug: brain M: Local mailbox tree: INBOX.Trash guid=a8494334bf3e5e64d44f15001890bc3b uid_validity=1669914528 uid_next=1 subs=yes last_change=0 last_subs=1763215050 Nov 15 19:28:47 dsync-local(jamie-test)<esqfB2/UGGl2tQAAVqcyLg>: Debug: brain M: Remote mailbox tree: INBOX guid=c06cb11ffc3b2e667cee07009334e653 uid_validity=1669914524 uid_next=561 subs=no last_change=0 last_subs=0 Nov 15 19:28:47 dsync-local(jamie-test)<esqfB2/UGGl2tQAAVqcyLg>: Debug: brain M: Remote mailbox tree: INBOX.Spam guid=00000000000000000000000000000000 uid_validity=0 uid_next=0 subs=yes last_change=0 last_subs=1683898047 Nov 15 19:28:47 dsync-local(jamie-test)<esqfB2/UGGl2tQAAVqcyLg>: Debug: brain M: Remote mailbox tree: INBOX.Sent guid=00000000000000000000000000000000 uid_validity=0 uid_next=0 subs=yes last_change=0 last_subs=1683898047 Nov 15 19:28:47 dsync-local(jamie-test)<esqfB2/UGGl2tQAAVqcyLg>: Debug: brain M: Remote mailbox tree: INBOX.Drafts guid=60042a30bf3e5e64d44f15001890bc3b uid_validity=1669914525 uid_next=1 subs=yes last_change=0 last_subs=1683898047 Nov 15 19:28:47 dsync-local(jamie-test)<esqfB2/UGGl2tQAAVqcyLg>: Debug: brain M: Remote mailbox tree: INBOX.Trash guid=a8494334bf3e5e64d44f15001890bc3b uid_validity=1669914528 uid_next=1 subs=yes last_change=0 last_subs=1683898047 Nov 15 19:28:47 dsync-local(jamie-test)<esqfB2/UGGl2tQAAVqcyLg>: Debug: brain M: Remote mailbox tree: INBOX.Archive guid=e42d3631a91ba85ef96f00000df6ea83 uid_validity=1586118770 uid_next=1 subs=yes last_change=0 last_subs=1763213508 Nov 15 19:28:47 dsync-local(jamie-test)<esqfB2/UGGl2tQAAVqcyLg>: Debug: brain M: Remote mailbox tree: INBOX.Archives guid=693e80288e6e8b5e153300000df6ea83 uid_validity=1586118767 uid_next=1 subs=no last_change=0 last_subs=0 Nov 15 19:28:47 dsync-local(jamie-test)<esqfB2/UGGl2tQAAVqcyLg>: Debug: brain M: Remote mailbox tree: INBOX.Junk guid=387dc412e591b0683b3b34009334e653 uid_validity=1714306055 uid_next=1 subs=yes last_change=0 last_subs=1763213508 Nov 15 19:28:47 dsync-local(jamie-test)<esqfB2/UGGl2tQAAVqcyLg>: Debug: brain M: Remote mailbox tree: INBOX.Keep Forever guid=99b2cc1be0826d61f07e00000df6ea83 uid_validity=1586118773 uid_next=1 subs=yes last_change=0 last_subs=1763213508 Nov 15 19:28:47 dsync-local(jamie-test)<esqfB2/UGGl2tQAAVqcyLg>: Debug: brain M: Remote mailbox tree deletion: guid=dcb7483819278b5e7a5a00000df6ea83 type=mailbox timestamp=1763214618 name= local update=not found Nov 15 19:28:47 dsync-local(jamie-test)<esqfB2/UGGl2tQAAVqcyLg>: Debug: brain M: Remote mailbox tree deletion: guid=e05fa533bf3e5e64d44f15001890bc3b type=mailbox timestamp=1763214618 name= local update=not found Nov 15 19:28:47 dsync-local(jamie-test)<esqfB2/UGGl2tQAAVqcyLg>: Debug: brain M: Remote mailbox tree deletion: guid=c30776db7d3c7eaa71cdf47ee8a11926 type=dir timestamp=1763214618 name=INBOX.Sent local update=marked as deleted Nov 15 19:28:47 dsync-local(jamie-test)<esqfB2/UGGl2tQAAVqcyLg>: Debug: brain M: Remote mailbox tree deletion: guid=edfa9436de94e7fff67418728a00db1d type=dir timestamp=1763214618 name=INBOX.Spam local update=marked as deleted Nov 15 19:28:47 dsync-local(jamie-test)<esqfB2/UGGl2tQAAVqcyLg>: Debug: brain M: Mailbox INBOX: local=c06cb11ffc3b2e667cee07009334e653/0/1, remote=c06cb11ffc3b2e667cee07009334e653/0/1: Mailboxes are equal Nov 15 19:28:47 dsync-local(jamie-test)<esqfB2/UGGl2tQAAVqcyLg>: Debug: brain M: Mailbox INBOX.Archive: local=e42d3631a91ba85ef96f00000df6ea83/0/1, remote=e42d3631a91ba85ef96f00000df6ea83/0/1: Mailboxes are equal Nov 15 19:28:47 dsync-local(jamie-test)<esqfB2/UGGl2tQAAVqcyLg>: Debug: brain M: Mailbox INBOX.Archives: local=693e80288e6e8b5e153300000df6ea83/0/1, remote=693e80288e6e8b5e153300000df6ea83/0/1: Mailboxes are equal Nov 15 19:28:47 dsync-local(jamie-test)<esqfB2/UGGl2tQAAVqcyLg>: Debug: brain M: Mailbox INBOX.Drafts: local=60042a30bf3e5e64d44f15001890bc3b/0/1, remote=60042a30bf3e5e64d44f15001890bc3b/0/1: Mailboxes are equal Nov 15 19:28:47 dsync-local(jamie-test)<esqfB2/UGGl2tQAAVqcyLg>: Debug: brain M: Mailbox INBOX.Junk: local=387dc412e591b0683b3b34009334e653/0/1, remote=387dc412e591b0683b3b34009334e653/0/1: Mailboxes are equal Nov 15 19:28:47 dsync-local(jamie-test)<esqfB2/UGGl2tQAAVqcyLg>: Debug: brain M: Mailbox INBOX.Keep Forever: local=99b2cc1be0826d61f07e00000df6ea83/0/1, remote=99b2cc1be0826d61f07e00000df6ea83/0/1: Mailboxes are equal Nov 15 19:28:47 dsync-local(jamie-test)<esqfB2/UGGl2tQAAVqcyLg>: Debug: brain M: Mailbox INBOX.Sent: local=00000000000000000000000000000000/0/0, remote=00000000000000000000000000000000/0/2: Directory rename branch not found Nov 15 19:28:47 dsync-local(jamie-test)<esqfB2/UGGl2tQAAVqcyLg>: Debug: brain M: Mailbox INBOX.Spam: local=00000000000000000000000000000000/0/0, remote=00000000000000000000000000000000/0/2: Directory rename branch not found Nov 15 19:28:47 dsync-local(jamie-test)<esqfB2/UGGl2tQAAVqcyLg>: Debug: brain M: Mailbox INBOX.Trash: local=a8494334bf3e5e64d44f15001890bc3b/0/1, remote=a8494334bf3e5e64d44f15001890bc3b/0/1: Mailboxes are equal Nov 15 19:28:47 dsync-local(jamie-test)<esqfB2/UGGl2tQAAVqcyLg>: Debug: Mailbox INBOX: Mailbox opened Nov 15 19:28:47 dsync-local(jamie-test)<esqfB2/UGGl2tQAAVqcyLg>: Debug: brain M: Syncing mailbox c06cb11ffc3b2e667cee07009334e653: UIDNEXT changed: 1 -> 561 Nov 15 19:28:47 dsync-local(jamie-test)<esqfB2/UGGl2tQAAVqcyLg>: Debug: doveadm-sieve: Iterating Sieve mailbox attributes Nov 15 19:28:47 dsync-local(jamie-test)<esqfB2/UGGl2tQAAVqcyLg>: Debug: sieve: Pigeonhole version 2.4.1-4 (0a86619f) initializing Nov 15 19:28:47 dsync-local(jamie-test)<esqfB2/UGGl2tQAAVqcyLg>: Debug: sieve: storage personal: file: Storage path '/home/users/%u/.sieve' not found Nov 15 19:28:47 dsync-local(jamie-test)<esqfB2/UGGl2tQAAVqcyLg>: Debug: sieve: storage personal: file: Failed to normalize active script directory (path=/home/users/%u): Part of the path does not exist (yet) Nov 15 19:28:47 dsync-local(jamie-test)<esqfB2/UGGl2tQAAVqcyLg>: Debug: sieve: storage personal: file: Using active Sieve script path: /home/users/%u/.dovecot.sieve Nov 15 19:28:47 dsync-local(jamie-test)<esqfB2/UGGl2tQAAVqcyLg>: Debug: sieve: storage personal: file: Using script storage path: /home/users/%u/.sieve Nov 15 19:28:47 dsync-local(jamie-test)<esqfB2/UGGl2tQAAVqcyLg>: Debug: sieve: storage personal: file: Using permissions from defaults: mode=0700 gid=-1 Nov 15 19:28:47 dsync-local(jamie-test)<esqfB2/UGGl2tQAAVqcyLg>: Error: brain M: Exporting mailbox INBOX failed: Mailbox attribute iteration failed: Internal error occurred. Refer to server log for more information. [2025-11-15 19:28:47] Nov 15 19:28:47 dsync-local(jamie-test)<esqfB2/UGGl2tQAAVqcyLg>: Debug: brain M: Import mailbox INBOX: Saved UIDs: Nov 15 19:28:47 dsync-local(jamie-test)<esqfB2/UGGl2tQAAVqcyLg>: Error: cmd sync: Remote command returned error 75: ssh root(a)mailstore002.mayfirst.org doveadm dsync-server -u jamie-test dsync-server Nov 15 19:28:47 dsync-local(jamie-test)<esqfB2/UGGl2tQAAVqcyLg>: Debug: User session is finished Nov 15 19:28:47 dsync-local(jamie-test)<esqfB2/UGGl2tQAAVqcyLg>: Debug: auth-master: conn unix:/run/dovecot/auth-userdb (pid=43923,uid=0): Disconnected: Connection closed (fd=9)

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"doveadm quota get" performance hit after enablig flat-curve plugin for mail account with 1.3k subfolders
by grabsoon＠gmail.com 28 Nov '25

28 Nov '25

Hello I have some performance problem with doveadm quota get -u user@domain after migrating from 2.3.21 to 2.4.1 and enabling fts-flatcurve plugin for mail account with 1330 folders and subfolders. Quota on 2.3.21 was stored in maildirsize. After upgrading dovecot to 2.4.2 quota driver is set to count When I run doveadm quota get -u user@domain command it takes about 15 minutes. Mail account quota is used about 6.7GB and about 10k messeges. Doveadm process use 100% CPU when it try to count quota values. When I run command doveadm with "strace" to trace callbacks it looks like: 14:51:00.577061 newfstatat(AT_FDCWD, "/maildovecot/*******/Maildir/Foldery przechowywania/Zakupy/drogerie/rossmann/fts-flatcurve/index.714", {st_mode=S_IFDIR|0700, st_size=4096, ...}, 0) = 0 14:51:00.577295 openat(AT_FDCWD, "/maildovecot/*******/Maildir/Foldery przechowywania/Zakupy/drogerie/rossmann/fts-flatcurve/index.714", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 13 14:51:00.577680 rmdir("/maildovecot/*******/Maildir/Foldery przechowywania/Zakupy/drogerie/rossmann/fts-flatcurve/index.714") = -1 ENOTEMPTY (Directory not empty) 14:51:00.577765 rmdir("/maildovecot/*******/Maildir/Foldery przechowywania/Zakupy/drogerie/rossmann/fts-flatcurve/index.714") = -1 ENOTEMPTY (Directory not empty) 14:51:00.577847 rmdir("/maildovecot/*******/Maildir/Foldery przechowywania/Zakupy/drogerie/rossmann/fts-flatcurve/index.714") = -1 ENOTEMPTY (Directory not empty) 14:51:00.577929 rmdir("/maildovecot/*******Maildir/Foldery przechowywania/Zakupy/drogerie/rossmann/fts-flatcurve/index.714") = -1 ENOTEMPTY (Directory not empty) or 14:33:44.529146 newfstatat(AT_FDCWD, "/maildovecot//******//Maildir/Foldery przechowywania/programy lojalnosciowe/vitay/fts-flatcurve/cur", 0x7fff0d9cf270, 0) = -1 ENOENT (No such file or directory) and it loops 2374 times grep fts-flatcurve strace_quota | grep rossmann | wc -l 2374 My configuration: quota "User quota" { driver = count quota_storage_grace = 10M quota_mail_size = 50M quota_message_count = 1500000 quota_warning warn-80-storage { quota_storage_percentage = 80 quota_warning_resource = storage quota_warning_threshold = over execute quota-warning { args = 80 size %{user} %{userdb:quota_storage_size} } } quota_warning warn-90-storage { quota_storage_percentage = 90 quota_warning_resource = storage quota_warning_threshold = over execute quota-warning { args = 90 size %{user} %{userdb:quota_storage_size} } } quota_warning warn-90-message { quota_message_percentage = 95 quota_warning_resource = message quota_warning_threshold = over execute quota-warning { args = 90 inodes } } } service quota-warning { executable = script /dovecot/bin/quota.sh user = mail unix_listener quota-warning { user = mail } } cat conf.d/90-fts.conf language_tokenizers = generic email-address language_tokenizer_generic_algorithm = simple language_filters = lowercase snowball stopwords fts_autoindex = yes fts_autoindex_max_recent_msgs = 100 fts_message_max_size = 20M fts_driver = flatcurve fts_decoder_driver = script fts_decoder_script_socket_path = decode2text service decode2text { executable = script /dovecot/bin/attachment2text.sh unix_listener decode2text { mode = 0666 user = dovecot group = dovecot } } fts_header_excludes { Authentication-Results = yes Received = yes DKIM-* = yes X-* = yes Comments = yes Date = yes Message-ID = yes Received = yes } mailbox TRASH { fts_autoindex = no } mailbox SPAM { fts_autoindex = no } mailbox confirmed-spam { fts_autoindex = no } mailbox confirmed-ham { fts_autoindex = no } language en { default = yes filters = lowercase snowball english-possessive stopwords } fts flatcurve { commit_limit = 500 min_term_size = 2 optimize_limit = 10 rotate_count = 5000 rotate_time = 5s substring_search = no } My questions are: Why "doveadm quota get" tries to open "fts-flatcurve" directories and tries to find "cur" or "ndex.714" directory? Is there any options to exclude all "fts-flatcurve" directories from quota ? Do you observe performance hit for mail accounts with many folders and subfolders after enabling fts-flatcurve?

1 0

Sieve default script configuration
by Bernard 27 Nov '25

27 Nov '25

Hello, Using Dovecot v2.4.1 (Devuan stable), I am facing difficulties debugging what is wrong with my configuration. Here is the error: Error: sieve: file storage: Performing t_readlink() on active sieve symlink '(null)' failed: readlink() failed: Bad address Error: sieve: Failed to access active Sieve script in parsonal storage 'default': Internal error occurred. Refer to server log for more information. [2025-11-13 19:08:48] (temporary failure) This happens on the mailbox which has no personal Sieve file in its personal directory, hence falling back to the default sieve configured that way: sieve_script default { type = default name = default driver = file path = /etc/sieve/ } /etc/sieve contains: drwxr-xr-x 2 root root 4096 Nov 13 18:57 /etc/sieve/ -rw-r--r-- 1 root root 2209 Aug 19 2021 default.sieve -rw-r--r-- 1 root root 2276 Nov 13 18:57 default.svbin I read: - https://doc.dovecot.org/2.4.2/installation/upgrade/2.3-to-2.4.html#converte… converting sieve_default to a sieve_script block with type = default - https://doc.dovecot.org/2.4.2/core/plugins/sieve.html#script-storage-type-d… doveadm sieve list -A returns: vmail default ACTIVE doveadm sieve get -A default returns the sieve file contents /etc/sieve was previously belonging to vmail:vmail. Switching to root:root did not yield any change. Moreover, running sievec on the default.sieve file with vmail:vmail permissions yielded default.svbin with root:root ownership. The error message is cryptic to me: what is this symlink problem? Cheers, Bernard Rosset

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