- dovecot - dovecot.org

[Dovecot] Dovecot optimisation
by Proskurin Kirill 20 Jan '09

20 Jan '09

Hello all. We start to use Dovecot at our email production but it runs not such fast as we expect. We use Dell 2950 with 4GbRAM at FreeBSD-7.0-p9 - load avarage never upper a 0.5 We have about 500 clients most of it use Outlook 2007 via IMAP. We run in this problems: 1) Sync of imap folder is really slow(I think it is Outlook problem) 2) Time after time we got Sync error from outlook 3) Time after time our monitoring system says what IMAP port not answer in 10 sec. In real life it start to answer in 15-20 sec what is not really good - client thinks what server don`t work. If I restart dovecot - it start to answer in 1-3 sec. I think problem in my conf, may be I need tune it? *dovecot -n don`t give full conf so i use this:* mail# grep -v '#' /usr/local/etc/dovecot.conf | egrep -v '^$' base_dir = /var/run/dovecot/ protocols = imap imaps pop3 pop3s managesieve listen = * disable_plaintext_auth = yes shutdown_clients = yes log_path = /var/log/dovecot/dovecot.log info_log_path = /var/log/dovecot/dovecot.log log_timestamp = "%b %d %H:%M:%S " syslog_facility = mail ssl_disable = no ssl_cert_file = /usr/local/etc/certs/fxclub_org.crt ssl_key_file = /usr/local/etc/certs/fxclub_org.key ssl_ca_file = /usr/local/etc/certs/GlobalSignCA.crt ssl_verify_client_cert = no ssl_parameters_regenerate = 168 ssl_cipher_list = ALL:!LOW:!SSLv2 verbose_ssl = no login_dir = /var/run/dovecot/login login_user = dovecot login_process_size = 64 login_process_per_connection = yes login_processes_count = 10 login_max_processes_count = 128 login_greeting = Dovecot ready. login_log_format_elements = user=<%u> method=%m rip=%r lip=%l %c login_log_format = %$: %s mail_location = maildir:/var/spool/dovecot/domains/%d/%n/ mail_uid = dmail mail_gid = dmail mail_privileged_group = mail mail_full_filesystem_access = no mail_debug = no mail_log_prefix = "%Us(%u): " mail_log_max_lines_per_sec = 10 mmap_disable = no dotlock_use_excl = yes fsync_disable = no mail_nfs_storage = no mail_nfs_index = no lock_method = fcntl mail_drop_priv_before_exec = no verbose_proctitle = yes first_valid_uid = 500 first_valid_gid = 0 max_mail_processes = 512 mail_process_size = 256 mail_max_keyword_length = 50 mail_cache_min_mail_count = 0 mailbox_idle_check_interval = 30 mail_save_crlf = no maildir_stat_dirs = no maildir_copy_with_hardlinks = yes maildir_copy_preserve_filename = no mbox_read_locks = fcntl mbox_write_locks = dotlock fcntl mbox_lock_timeout = 300 mbox_dotlock_change_timeout = 120 mbox_min_index_size = 0 protocol imap { login_executable = /usr/local/libexec/dovecot/imap-login mail_executable = /usr/local/libexec/dovecot/imap imap_max_line_length = 65536 mail_max_userip_connections = 10 mail_plugins = quota imap_quota autocreate mail_plugin_dir = /usr/local/lib/dovecot/imap login_greeting_capability = yes imap_logout_format = bytes=%i/%o imap_client_workarounds = delay-newmail tb-extra-mailbox-sep } protocol pop3 { login_executable = /usr/local/libexec/dovecot/pop3-login mail_executable = /usr/local/libexec/dovecot/pop3 pop3_enable_last = no pop3_lock_session = no pop3_uidl_format = %08Xu%08Xv pop3_logout_format = top=%t/%p, retr=%r/%b, del=%d/%m, size=%s mail_max_userip_connections = 3 mail_plugins = quota mail_plugin_dir = /usr/local/lib/dovecot/pop3 pop3_client_workarounds = outlook-no-nuls oe-ns-eoh } protocol lda { postmaster_address = postmaster(a)fxclub.org hostname = mail.fxclub.org mail_plugins = cmusieve quota mail_plugin_dir = /usr/local/lib/dovecot/lda quota_full_tempfail = yes deliver_log_format = msgid=%m: %$ log_path = /var/log/dovecot/deliver.log info_log_path = /var/log/dovecot/deliver.log sendmail_path = /usr/sbin/sendmail rejection_reason = Your message to <%t> was automatically rejected:%n%r auth_socket_path = /var/run/dovecot/auth-master sieve_global_path = /var/spool/dovecot/global.sieve } protocol managesieve { listen = *:2000 login_executable = /usr/local/libexec/dovecot/managesieve-login mail_executable = /usr/local/libexec/dovecot/managesieve managesieve_max_line_length = 65536 sieve_storage = % sieve = ~/.dovecot.sieve mail_location = managesieve_implementation_string = dovecot } auth_executable = /usr/local/libexec/dovecot/dovecot-auth auth_process_size = 256 auth_cache_size = 0 auth_cache_ttl = 3600 auth_cache_negative_ttl = 3600 auth_username_chars = abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890.-_@ auth_username_format = %Lu auth_verbose = yes auth_debug = no auth_debug_passwords = no auth_worker_max_count = 100 auth_failure_delay = 2 auth default { mechanisms = plain login passdb ldap { args = /usr/local/etc/dovecot-ldap.conf } userdb ldap { args = /usr/local/etc/dovecot-ldap.conf } user = dovecot-auth count = 1 ssl_require_client_cert = no socket listen { master { path = /var/run/dovecot/auth-master mode = 0600 user = dmail } client { path = /var/run/dovecot/auth-client mode = 0660 user = exim } } } dict { } plugin { quota = maildir quota_rule = *:storage=1024M quota_rule2 = Trash:storage=1256M quota_rule3 = SPAM:ignore quota_warning = storage=95%% /usr/local/bin/quota-warning.sh 95 quota_warning2 = storage=80%% /usr/local/bin/quota-warning.sh 80 autocreate = Trash autocreate2 = Sent autocreate3 = Spam autosubscribe = Trash autosubscribe2 = Sent autosubscribe3 = Spam } -- Best regards, Proskurin Kirill

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[Dovecot] redirecting temp email files to another directory
by JANE CUA 20 Jan '09

20 Jan '09

Hi, Is is possible to redirect temp email files to another folder like /tmp or somewhere else, instead of having it in the same /var/spool where the mbox is?

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[Dovecot] Errmsgs b4 and after migration DC V1.0.15 to V1.1.8
by Stewart Dean 20 Jan '09

20 Jan '09

Last Wednesday at 12:21 I made this switch, which seemed to be uneventful. In any case, no user has reported problems since the migration. Not content to leave well enough alone, this morning I scanned the syslog and maillog for dovecot related errors. What I found was that: Before the Migration=========================== I saw a lot of SSL errors that look like this: > Jan 14 11:49:23 mercury mail:warn|warning dovecot: imap-login: SSL_read() syscall failed: Connection reset by peer [69.180.200.184] > Jan 14 11:52:28 mercury mail:warn|warning dovecot: imap-login: SSL_read() syscall failed: Connection reset by peer [68.6.82.45] Which l took to be breakin attempts of some sort, except that I haven't seen any since the migration! After the migration==================================== I see errors like this: > Jan 14 12:21:45 mercury mail:err|error dovecot: IMAP(eg115): Corrupted index cache file /var/dcindx/eg115/.imap/INBOX/dovecot.index.cache: Broken MIME parts for mail UID 1934 > Jan 14 12:21:46 mercury mail:err|error dovecot: IMAP(alexande): Corrupted index cache file /var/dcindx/alexande/.imap/INBOX/dovecot.index.cache: Broken MIME parts for mail UID 132641 > Jan 14 12:21:46 mercury mail:err|error dovecot: IMAP(ls454): Corrupted index cache file /var/dcindx/ls454/.imap/INBOX/dovecot.index.cache: Broken MIME parts for mail UID 47 > Jan 14 12:21:46 mercury mail:err|error dovecot: IMAP(tr489): Corrupted index cache file /var/dcindx/tr489/.imap/INBOX/dovecot.index.cache: Broken MIME parts for mail UID 1 > Jan 14 12:21:54 mercury mail:err|error dovecot: IMAP(bh265): Corrupted index cache file /var/dcindx/bh265/.imap/INBOX/dovecot.index.cache: Broken MIME parts for mail UID 2 > Jan 14 12:22:01 mercury mail:err|error dovecot: IMAP(crouch): Corrupted index cache file /var/dcindx/crouch/.imap/INBOX/dovecot.index.cache: Broken MIME parts for mail UID 4863 > It appears that this error appears the first time a folder is referenced, then not again (I think but am not absolutely positive). Did the indexing method/format change in some way that would cause this (and Dovecot heals itself!) ? Is there any continuing problem inherent in this that needs to be dealt with? Thanks! -- "Eppur si muove." (But Still it moves) Galileo, leaving the Inquisition, after buckling under the threat of torture and excommunication and recanting from his proof that the heavens do not revolve around the earth -- Stewart Dean, Unix System Admin, Henderson Computer Center, Bard College, Annandale, New York 12504 sdean(a)bard.edu voice: 845-758-7475, fax: 845-758-7035

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[Dovecot] Coding question again...
by Stefan Jurisch 20 Jan '09

20 Jan '09

Hello again, I have a coding question again: I can obtain the path of the current user's mailbox with the function mail_storage_get_mailbox_path(...) - so far so good. But is it possible to get this mailbox path for another user than the logged in one? Thanks in advance. Best regards. Stefan -- SIEGNETZ.IT GmbH { w3o-services } Schneppenkauten 1a D-57076 Siegen Tel.: 0271 68193-0 Fax: 0271 68193-29 Geschäftsführer: Oliver Seitz Handelsregister-Nummer: HRB4838 Registergericht: Amtsgericht Siegen -------------------------------- Das Wort “WINDOWS” stammt aus einem alten Sioux-Dialekt und bedeutet: “Weißer Mann starrt durch Glasscheibe auf Sanduhr.” -------------------------------- -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.

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[Dovecot] deliver: command died with signal 6
by Jan-Frode Myklebust 20 Jan '09

20 Jan '09

We recently upgraded to dovecot v1.0.15 (from v1.0.0 + some local fixes), and after this upgrade we've started to get a couple of failures from deliver: Jan 12 20:34:34 smtp1.ulh.mydomain.net deliver(someuser(a)somedomain.net): Raw backtrace: /usr/local/dovecot/libexec/dovecot/deliver(i_syslog_panic_handler+0x1c) [0x45577c] -> /usr/local/dovecot/libexec/dovecot/deliver [0x45537c] -> /usr/local/dovecot/libexec/dovecot/deliver(mail_index_sync_update_index+0x86f) [0x43eb8f] -> /usr/local/dovecot/libexec/dovecot/deliver(mail_index_sync_begin+0x245) [0x43c6e5] -> /usr/local/dovecot/libexec/dovecot/deliver(maildir_sync_index_begin+0x45) [0x4162d5] -> /usr/local/dovecot/libexec/dovecot/deliver(maildir_transaction_save_commit_pre+0x68) [0x41c638] -> /usr/local/dovecot/libexec/dovecot/deliver(maildir_transaction_commit+0x70) [0x417320] -> /usr/local/dovecot-1.0.15/lib/dovecot/lda/lib10_quota_plugin.so [0x2a9557d3a8] -> /usr/local/dovecot/libexec/dovecot/deliver(deliver_save+0x136) [0x410856] -> /usr/local/dovecot/libexec/dovecot/deliver(main+0x1023) [0x411c43] -> /lib64/tls/libc.so.6(__libc_start_main+0xdb) [0x3cbd81c40b] -> /usr/local/dovecot/libexec/dovecot/deliver [0x40ffaa] Jan 12 20:38:53 smtp2.ulh.mydomain.net deliver(quarantine(a)mydomain.net): Raw backtrace: /usr/local/dovecot/libexec/dovecot/deliver(i_syslog_panic_handler+0x1c) [0x45577c] -> /usr/local/dovecot/libexec/dovecot/deliver [0x45537c] -> /usr/local/dovecot/libexec/dovecot/deliver(mail_index_sync_update_index+0x86f) [0x43eb8f] -> /usr/local/dovecot/libexec/dovecot/deliver(mail_index_sync_begin+0x245) [0x43c6e5] -> /usr/local/dovecot/libexec/dovecot/deliver(maildir_sync_index_begin+0x45) [0x4162d5] -> /usr/local/dovecot/libexec/dovecot/deliver [0x416ed5] -> /usr/local/dovecot/libexec/dovecot/deliver(maildir_sync_last_commit+0x4b) [0x4170bb] -> /usr/local/dovecot-1.0.15/lib/dovecot/lda/lib10_quota_plugin.so [0x2a9557d3a8] -> /usr/local/dovecot/libexec/dovecot/deliver(deliver_save+0x136) [0x410856] -> /usr/local/dovecot/libexec/dovecot/deliver(main+0x1023) [0x411c43] -> /lib64/tls/libc.so.6(__libc_start_main+0xdb) [0x322e11c40b] -> /usr/local/dovecot/libexec/dovecot/deliver [0x40ffaa] Jan 13 10:37:59 atmail1.ulh.mydomain.net deliver(quarantine(a)mydomain.net): Raw backtrace: /usr/local/dovecot/libexec/dovecot/deliver(i_syslog_panic_handler+0x1c) [0x45577c] -> /usr/local/dovecot/libexec/dovecot/deliver [0x45537c] -> /usr/local/dovecot/libexec/dovecot/deliver(mail_index_sync_update_index+0x86f) [0x43eb8f] -> /usr/local/dovecot/libexec/dovecot/deliver(mail_index_sync_begin+0x245) [0x43c6e5] -> /usr/local/dovecot/libexec/dovecot/deliver(maildir_sync_index_begin+0x45) [0x4162d5] -> /usr/local/dovecot/libexec/dovecot/deliver(maildir_transaction_save_commit_pre+0x68) [0x41c638] -> /usr/local/dovecot/libexec/dovecot/deliver(maildir_transaction_commit+0x70) [0x417320] -> /usr/local/dovecot-1.0.15/lib/dovecot/lda/lib10_quota_plugin.so [0x2a9557d3a8] -> /usr/local/dovecot/libexec/dovecot/deliver(deliver_save+0x136) [0x410856] -> /usr/local/dovecot/libexec/dovecot/deliver(main+0x1023) [0x411c43] -> /lib64/tls/libc.so.6(__libc_start_main+0xdb) [0x3ac5a1c40b] -> /usr/local/dovecot/libexec/dovecot/deliver [0x40ffaa] Unfortunatley these leads to bounce messages to the sender: Jan 13 10:37:59 atmail1.ulh.mydomain.net postfix/pipe[6320]: BB3337E4E7: to=<quarantine(a)mydomain.net>, relay=dovecot, delay=2.3, delays=0.06/0/0/2.2, dsn=5.3.0, status=bounced (Command died with signal 6: "/usr/local/dovecot/libexec/dovecot/deliver") First, does anybody know if it's possible to change the behaviour here to not bounce, but retry instead ? And, is there anything we should do to debug further what the problem might be ? -jf

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[Dovecot] Migration dbmail -> dovecot.
by Андрей Юртайкин 20 Jan '09

20 Jan '09

Hi i want to migrate from dbmail to dovecot, the main problem is passwords. dbmail uses "md5-hash" wich crypt "111" to "$1$tZNR7pR4$jMuuKWm7ljRyL8iEMfjep.". Tried all dovecot pass schemes thru `dovecotpw` and no one matches. The main question is how to migrate dbmail -> dovecot.

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[Dovecot] NFS group RQUOTA
by Kostik 20 Jan '09

20 Jan '09

Hi All. Linux have EXT_RQUOTAPROG (Extended (LINUX) RPC quota program). Does anybody know how to implement dovecot GROUP NFS quota-fs? =kostik

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[Dovecot] "userdb didn't return a home directory" with v1.1.7
by Ivars Strazdiņš 20 Jan '09

20 Jan '09

Hi all, I am running Dovecot v1.1.7 in a relatively quiet and calm environment. Suddenly overnight cron job started throwing out errors like: /usr/sbin/dovecot --exec-mail ext /usr/lib/dovecot/expire-tool Error: userdb(user1(a)mail.example) didn't return a home directory Error: userdb(user2(a)mail.example) didn't return a home directory Indeed, running this command produces: ------------------------- $ sudo /usr/sbin/dovecot --exec-mail ext /usr/lib/dovecot/expire-tool --test Error: userdb(user1(a)mail.example) didn't return a home directory Info: User lookup failed: user1(a)mail.example Error: userdb(user2(a)mail.example) didn't return a home directory Info: User lookup failed: user2(a)mail.example ------------------------- Yet these mailboxes are valid, corresponding users can login, send and receive mail. Other mailboxes are OK, too. Where to to start looking? I found that similar error message with v1.1.6 is fixed in v1.1.7, but I am running v.1.1.7 already. Please see dovecot configuration attached. Thank you for your time, Ivars

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[Dovecot] checkpassword auth issues
by Tim Traver 20 Jan '09

20 Jan '09

Hi, ok, I'm am developing a new solution that includes dovecot, and will be wanting to use the latest sieve implementation, so I have chosen to start with 1.2 as the base. I had a working install of 1.1.8 installed, and got a checkpassword setup working properly with it to authenticate a user. I used the passdb to call checkpassword, and the prefetch userdb to tell it to use the values that I sent back from the checkpassword script... I compiled and installed 1.2.alpha5, and now my checkpassword does not seem to be working, and I can't figure out why. If I go back and install 1.1.8, it all works again... here is the dovecot -n : [root@mta3 /local/logs]# dovecot -n # 1.2.alpha5: /usr/local/etc/dovecot.conf # OS: FreeBSD 7.0-STABLE i386 log_path: /local/logs/dovecot.errors protocols: imap imaps pop3 pop3s disable_plaintext_auth: no login_dir: /usr/local/var/run/dovecot/login login_executable(default): /usr/local/libexec/dovecot/imap-login login_executable(imap): /usr/local/libexec/dovecot/imap-login login_executable(pop3): /usr/local/libexec/dovecot/pop3-login verbose_proctitle: yes first_valid_uid: 100 mail_uid: 100 mail_gid: 100 mail_location: maildir:%h/Maildir mail_debug: yes mmap_disable: yes mail_nfs_storage: yes mail_nfs_index: yes mail_executable(default): /usr/local/libexec/dovecot/imap mail_executable(imap): /usr/local/libexec/dovecot/imap mail_executable(pop3): /usr/local/libexec/dovecot/pop3 mail_plugin_dir(default): /usr/local/lib/dovecot/imap mail_plugin_dir(imap): /usr/local/lib/dovecot/imap mail_plugin_dir(pop3): /usr/local/lib/dovecot/pop3 pop3_client_workarounds(default): pop3_client_workarounds(imap): pop3_client_workarounds(pop3): outlook-no-nuls oe-ns-eoh auth default: username_translation: %@ username_format: %Lu verbose: yes debug: yes debug_passwords: yes passdb: driver: checkpassword args: /bin/checkpassword userdb: driver: prefetch and here is a snip of the logs that I get when trying to log in : dovecot: Jan 19 11:37:47 Info: auth(default): client in: AUTH 1 PLAIN service=imap secured lip=209.132.1.203 rip=209.132.9.162 lport=993 rport=1053 dovecot: Jan 19 11:37:47 Info: auth(default): client out: CONT 1 dovecot: Jan 19 11:37:47 Info: auth(default): client in: CONT 1 AHRpbUBtdGEzLnNjYWxlZHN5c3RlbXMuY29tAENvbGRTdW4x dovecot: Jan 19 11:37:47 Info: auth(default): checkpassword(tim(a)mta3.scaledsystems.com,209.132.9.162): execute: /bin/checkpassword /usr/local/libexec/dovecot/checkpassword-reply dovecot: Jan 19 11:37:47 Info: auth(default): checkpassword(tim(a)mta3.scaledsystems.com,209.132.9.162): Received input: user=tim(a)mta3.scaledsystems.com userdb_home=/home/mailboxes/data/30/tim(a)mta3.scaledsystems.com userdb_uid=100 userdb_gid=100 dovecot: Jan 19 11:37:47 Info: auth(default): checkpassword(tim(a)mta3.scaledsystems.com,209.132.9.162): Received no input dovecot: Jan 19 11:37:47 Info: auth(default): checkpassword(tim(a)mta3.scaledsystems.com,209.132.9.162): exit_status=2 dovecot: Jan 19 11:37:47 Error: auth(default): checkpassword(tim(a)mta3.scaledsystems.com,209.132.9.162): Child 43345 exited with status 2 As you can see, the checkpassword routine is indeed sending outthe userdb_home variable as well as the other necessary variables. Is it possible that checks for the return code from calling the checkpassword script have changed between the versions??? I currently exit the checkpassword script with _exit(0); to make the status 0 when it is successful, and I also set the AUTHORIZED environment variable to "2" as told... wierd thing is that it works in 1.1.8, but not in 1.2 Thanks, Tim.

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[Dovecot] donations
by Ed Ewing 19 Jan '09

19 Jan '09

Just wondering if you don't respond to donations or don't get notified?

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