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Issues with mail_crypt plugin: per-user encryption with keys from LDAP
by luis.neapolis＠gmail.com 05 Dec '25

05 Dec '25

Hi everyone, I am trying to configure Dovecot's mail_crypt plugin to support per-user encryption, with public and private keys stored in LDAP and retrieved via userdb. My Goal: 1) Each user has their own key pair (public/private) stored in LDAP. 2) Incoming emails should be encrypted via LMTP using the user’s public key. 3) Users should be able to read emails via IMAP/Webmail using their private key, which is password-protected (the user’s login password). Current situation: 1) Using global keys (same key for all users) works fine: LMTP encrypts emails and users can read them correctly. 2) When trying to use per-user keys, I get encryption errors in IMAP, because Dovecot seems to require the private key even during LMTP, even though only the public key should be needed for encryption. Typical error: lmtp(…): Failed to initialize user: mail_crypt_plugin: main: crypt_private_key_password unset, no password to decrypt the key file Example configuration (LDAP userdb): crypt_user_key_require_encrypted = yes userdb ldap { driver = ldap ldap_filter = (&(objectClass=MailClass) (mail=%{user})) result_internalfail = continue-ok fields { quota_storage_size = %{ldap:quota|default('5')}G mail_home = %{ldap:homeDirectory} crypt_global_public_key_file=inline:%{ldap:CryptoGlobalPubKey|default("")} crypt_global_private_key/main/crypt_private_key_file=inline:%{ldap:CryptoGlobalPrivKey|default('')} crypt_private_key_password=%{password} } } Questions / help requested: 1) Is it possible to configure mail_crypt so that LMTP can encrypt emails using only the user’s public key, without needing the private key? 2) What is the correct way to use per-user keys with password-protected private keys? 3) Are there any working examples of mail_crypt configurations using LDAP as the source for per-user keys? I am fully aware that LMTP needs the private key of the user even if LMTP doesn't use, but during LMTP session the user password is not available. Version: 2.4.2-1 (0962ed2104) Thanks in advance for any guidance!

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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

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Defining "INBOX" in mdbox context from ldap
by Florian Lohoff 03 Dec '25

03 Dec '25

Hi, i am in the middle of converting a handful of 2.3 installations to 2.4 and while at it i fail to see a point on how to define what the INBOX is in the mdbox/ldap context. So right now i am transferring the attributes from LDAP like this (iredmail schema) fields { user=%{ldap:mail} home=%{ldap:storageBaseDirectory} mail_driver=%{ldap:MailMessageStore | index(':', 0)} mail_path=%{ldap:mailMessageStore | index(':', 1)} quota_storage_size=%{ldap:mailQuota} } I fail to find the syntax for "mail_inbox_path" - In maildir its obvious. I tried various things but it mainly failed on me. I now removed it completely from the config which it seems makes the dbox/mdbox driver assume a sane default of "INBOX". But i am still wondering how do i configure the INBOX. I'd like to fetch that information from LDAP as i think i still have a handful of Maildir/mdbox mix installations. Flo -- Florian Lohoff f(a)zz.de Any sufficiently advanced technology is indistinguishable from magic.

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Re: Dovecot 2.4.1 with mbox format
by "Tóth Attila" 02 Dec '25

02 Dec '25

Hi Bill, 2025.December 1.(H) 23:56 időpontban Bill Steinberg via dovecot ezt írta: > Hello again, > I didn't fully read the section in the documentation about using the > mbox > format. There is a setting, mail_inbox_path = /var/mail/%{user} to > specify > the iNBOX location for mails that are stored in /var/mail. > After setting mail_inbox_path I did initially have an issue about > dovecot > being able to write dotlock files, which was noted in the > documentation. I > was able to fix by adding users to the group "mail". > I am using these settings in the new server now: > > mail_driver = mbox > > mail_path = ~/mail > > mail_inbox_path = /var/mail/%{user} > > mail_index_path = ~/mail/index > > mail_control_path = ~/mail/control I'm struggling with the same setup as yourself. Sendmail delivers mails under /var/spool/mail/username and mail user agents were fetching the incoming mail from there and put them under /home/username/mail. This has been fine for ages - I have to say decades now. While 2.3 created files/directories in the name of the current user under ~/mail, 2.4 tries to write as mail:mail and therefore gets denied, since the user directories are owned by username:users and obviously have no permissions for other users. This change of behaviour is unacceptable in my opinion and 2.4 should also act in the name of the actual user. If some of the files would be owned by mail:mail and others by username:users: that would be a mess and the user would not be able to read contents using other user agents (for e.g. alpine) or make a backup of their own emails using an arbitrary tool or script of their own. For this reason I downgraded back to 2.3, because I have no time to dig deeper into this and reintroduce the mechanism granting current user access rights - running certain processes under proper conditions. Bill: how do you achieve that dovecot creates and writes files in users home directories in the name of the current user? Back in the good old 2.3 days I had this in the config and everything just worked as expected: mail_location = mbox:~/mail/:INBOX=/var/spool/mail/%u In case of the new 2.4 version I was unsuccessful with the following: mail_driver = mbox mail_path = /home/%{user}/mail mail_inbox_path = /var/spool/mail/%{user} server dovecot: imap(user)<48978><1LgipBQ3LO1/AAAB>: Error: mkdir(/home/user/mail/.imap) failed: Permission denied (euid=8(mail) egid=12(mail) missing +x perm: /home/user/mail, dir owned by 1000:100 mode=0700) Although I haven't specified mail_index_path and mail_control_path as you, I wouldn't expect this to make any difference regarding user rights. I'm aware, that mbox is deprecated, but still: this is a regression from my point of view. So how about user rights in your case Bill? Thanks: Dwokfur > > On Dec 1, 2025, at 10:18AM, Bill Steinberg via dovecot > <dovecot(a)dovecot.org> wrote: > Hello, > I'm attempting to upgrade a mbox format based dovecot server to the > latest > 2.4.1 on Fedora release 43. I am using sendmail at the MTA. I have provided a synopsis of my 2.4.1 dovecot config below. The dovecot > server > I'm attempting to upgrade is running dovecot 2.3.21 on Fedora 37. In the 2.3.21 setup all mbox based folders are at the top level in > the > user's ~/mail location For example Sent, Trash, Drafts, ... In dovecot 2.4.1 this setting no longer works: "mail_location = mbox:~/mail:INBOX=/var/mail/%u",so when a client connects to the > dovecot > server their sendmail based mbox /var/mail isn't visible. Additionally mbox folders directly under a user's ~/mail iike Sent, > Trash, > Drafts are not visible either. > The new 2.4.1 dovecot server creates a folder named "inbox" under > ~/mail > as well as an .imap directory which contains directories that > appear > to > correspond to the folders at the top level along with other dovecot > based > files. > Can you describe how I would make the seamail delivered mail in > /var/spool > as well as a users top level mbox folders accessible in the new > dovecot > mbox structures? > Thanks in advance for any help, > -Bill > ====================================== > Dovecot config > ====================================== > > dovecot_config_version = 2.4.1 > > dovecot_storage_version = 2.4.1 > > protocols { > > imap = yes > > lmtp = yes > > } > > mail_driver = mbox > > mail_home = /home/%{user} > > mail_path = ~/mail > > mbox_write_locks = fcntl > > namespace inbox { > > inbox = yes > > separator = / > > } > _______________________________________________ > dovecot mailing list -- dovecot(a)dovecot.org > To unsubscribe send an email to dovecot-leave(a)dovecot.org > _______________________________________________ > dovecot mailing list -- dovecot(a)dovecot.org > To unsubscribe send an email to dovecot-leave(a)dovecot.org >

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Dovecot 2.4.1 with mbox format
by Bill Steinberg 01 Dec '25

01 Dec '25

Hello, I’m attempting to upgrade a mbox format based dovecot server to the latest 2.4.1 on Fedora release 43. I am using sendmail at the MTA. I have provided a synopsis of my 2.4.1 dovecot config below. The dovecot server I’m attempting to upgrade is running dovecot 2.3.21 on Fedora 37. In the 2.3.21 setup all mbox based folders are at the top level in the user’s ~/mail location For example Sent, Trash, Drafts, … In dovecot 2.4.1 this setting no longer works: "mail_location = mbox:~/mail:INBOX=/var/mail/%u”,so when a client connects to the dovecot server their sendmail based mbox /var/mail isn’t visible. Additionally mbox folders directly under a user’s ~/mail iike Sent, Trash, Drafts are not visible either. The new 2.4.1 dovecot server creates a folder named “inbox” under ~/mail as well as an .imap directory which contains directories that appear to correspond to the folders at the top level along with other dovecot based files. Can you describe how I would make the seamail delivered mail in /var/spool as well as a users top level mbox folders accessible in the new dovecot mbox structures? Thanks in advance for any help, -Bill ====================================== Dovecot config ====================================== dovecot_config_version = 2.4.1 dovecot_storage_version = 2.4.1 protocols { imap = yes lmtp = yes } mail_driver = mbox mail_home = /home/%{user} mail_path = ~/mail mbox_write_locks = fcntl namespace inbox { inbox = yes separator = / } Hello, I'm attempting to upgrade a mbox format based dovecot server to the latest 2.4.1 on Fedora release 43. I am using sendmail at the MTA. I have provided a synopsis of my 2.4.1 dovecot config below. The dovecot server I'm attempting to upgrade is running dovecot 2.3.21 on Fedora 37. In the 2.3.21 setup all mbox based folders are at the top level in the user's ~/mail location For example Sent, Trash, Drafts, ... In dovecot 2.4.1 this setting no longer works: "mail_location = mbox:~/mail:INBOX=/var/mail/%u",so when a client connects to the dovecot server their sendmail based mbox /var/mail isn't visible. Additionally mbox folders directly under a user's ~/mail iike Sent, Trash, Drafts are not visible either. The new 2.4.1 dovecot server creates a folder named "inbox" under ~/mail as well as an .imap directory which contains directories that appear to correspond to the folders at the top level along with other dovecot based files. Can you describe how I would make the seamail delivered mail in /var/spool as well as a users top level mbox folders accessible in the new dovecot mbox structures? Thanks in advance for any help, -Bill ====================================== Dovecot config ====================================== dovecot_config_version = 2.4.1 dovecot_storage_version = 2.4.1 protocols { imap = yes lmtp = yes } mail_driver = mbox mail_home = /home/%{user} mail_path = ~/mail mbox_write_locks = fcntl namespace inbox { inbox = yes separator = / }

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managesieve-crash on 2.4.2
by Bjoern Franke 28 Nov '25

28 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

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"Mailbox attribute iteration failed": error running doveadm sync
by jamie＠mayfirst.org 28 Nov '25

28 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)

2 2

"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 26 Nov '25

26 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

3 13

issue getting unseen count from a mailbox
by Louis-David Mitterrand 26 Nov '25

26 Nov '25

Hi, I'm using wmbiff to monitor my imap mailboxes with a script that polls every minute: eval "ssh $WMHOST \"doveadm mailbox status -u ldm 'messages unseen' $(printf %q "$WMBOX")\" 2>/dev/null" |\ awk -F'[ =]' '{old=$3; new=$5} END {print old, new+0}' |\ { read old new; if [ $new -gt 0 ] ;then echo $new new; else echo $old; fi; } If I haven't polled the mailbox before with mutt or another MUA then only the total message count will be returned, however if I peek at the mailbox with a MUA (without looking at any message) then the script returns the new message count. How can I have dovecot (2.4.1 debian) always return the unseen message count in any case? Thanks,

1 0