- dovecot - dovecot.org

[Dovecot] dbmail benchmarking
by Timo Sirainen 16 May '07

16 May '07

I thought I'd try benchmarking with dbmail (v2.2.4) to see how much slower a SQL backend could actually be. Skip to bottom for the conclusions. Originally I ran the tests with the databases being in XFS filesystem. MySQL's performance was horrible. It went 3-7x faster with ext3. MySQL 5.0.30 backend (innodb): ./imaptest clients=1 - append=100 seed=1 secs=30 msgs=1000000 logout=0 Logi Sele Appe 100% 100% 100% 5% 1 291 303 So that's 10 messages/sec saved. Now how about with 5 concurrent clients? Logi Sele Appe 100% 100% 100% 5% 5 1259 1332 Pretty well. Then something more generic: ./imaptest clients=1 seed=1 secs=30 msgs=1000000 logout=0 Logi List Stat Sele Fetc Fet2 Stor Dele Expu Appe 100% 50% 50% 100% 100% 100% 50% 100% 100% 100% 30% 5% 1 37 36 75 73 110 34 24 73 78 Without Fetc (header/metadata fetching): Logi List Stat Sele Fet2 Stor Dele Expu Appe 100% 50% 50% 100% 100% 50% 100% 100% 100% 30% 5% 1 94 94 199 283 102 85 198 210 PostgreSQL 8.1.5 backend: ./imaptest clients=1 - append=100 seed=1 secs=30 msgs=1000000 logout=0 Logi Sele Appe 100% 100% 100% 5% 1 267 277 ./imaptest clients=5 - append=100 seed=1 secs=30 msgs=1000000 logout=0 Logi Sele Appe 100% 100% 100% 5% 5 1094 1144 ./imaptest clients=1 seed=1 secs=30 msgs=1000000 logout=0 Logi List Stat Sele Fetc Fet2 Stor Dele Expu Appe 100% 50% 50% 100% 100% 100% 50% 100% 100% 100% 30% 5% 9 29 40 74 72 99 22 12 64 71 ./imaptest clients=1 seed=1 secs=30 msgs=1000000 logout=0 fetch=0 Logi List Stat Sele Fet2 Stor Dele Expu Appe 100% 50% 50% 100% 100% 50% 100% 100% 100% 30% 5% 35 105 95 200 277 54 70 165 175 The last two tests gave "Unexpected tagged reply:" errors that I didn't get with MySQL. So apparently there's some PostgreSQL-specific bug in dbmail. The same values with Dovecot 1.0 + maildir: ./imaptest clients=1 - append=100 seed=1 secs=30 msgs=1000000 logout=0 Logi Sele Appe 100% 100% 100% 5% 1 346 364 ./imaptest clients=5 - append=100 seed=1 secs=30 msgs=1000000 logout=0 Logi Sele Appe 100% 100% 100% 5% 5 1408 1470 ./imaptest clients=1 seed=1 secs=30 msgs=1000000 logout=0 Logi List Stat Sele Fetc Fet2 Stor Dele Expu Appe 100% 50% 50% 100% 100% 100% 50% 100% 100% 100% 30% 5% 1 130 133 259 258 382 123 127 257 271 ./imaptest clients=1 seed=1 secs=30 msgs=1000000 logout=0 fetch=0 Logi List Stat Sele Fet2 Stor Dele Expu Appe 100% 50% 50% 100% 100% 50% 100% 100% 100% 30% 5% 1 155 163 339 478 169 175 338 354 So, what are the conclusions? - In raw append speed dbmail is almost as fast as maildir. - In raw read/write speed maildir is about 1,6 times faster - When adding metadata fetches Dovecot is 4 times faster than dbmail. This is most likely because dbmail doesn't have a cache equivalent to dovecot.index.cache so it has to do the fetches the slow way. I would have liked to also run the generic tests with more than 1 client, but then I start hitting dbmail bugs and the test stops (reported already to their bugtracker).

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[Dovecot] OS X Mail Administration
by Bruce Bodger 16 May '07

16 May '07

I'd like to request some feed back from any OS X Mail Admins on the list, please. Currently running 10.4.9 here using postfix / dovecot and I'm about to take the plunge from mbox to maildir. I just migrated from uw-imap to dovecot. As you're aware, users inbox's are customarily stored in /var/mail/% username and personal folders under /Users/%username/Library/Mail/IMAP. I'd appreciate if you'd share with me the directory structure that you use, or would use in my situation. All mail storage will be on the server so disk space is not an issue. I'm a bit confused whether or not to keep the inbox separate from the other imap structure as is the OS X default: should all mailboxes be under inbox, etc. Your input would be appreciated. Thank you, B. Bodger New York, NY

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[Dovecot] Maildir POP3 "UID larger than next_uid" bug
by Alexander Moisseev 16 May '07

16 May '07

dovecot 1.0.0; Free BSD 6.2; x86; UFS; no NFS IMAP not uses at all, POP3 only Problem description: POP3 client can't fetch second e-mail message from Maildir if first POP3 connect occurs before any message placed in Maildir. Details: 1. POP3-client first time tries to receive mail: May 14 16:17:36 host dovecot: pop3-login: Login: user=<user(a)mydomain.ru>, method=PLAIN, rip=192.168.0.100, lip=192.168.0.3 May 14 16:17:36 host dovecot: POP3(user(a)mydomain.ru): Disconnected: Logged out top=0/0, retr=0/0, del=0/0, size=0 dovecot creates Maildir for that user: /var/mail/virtual/mydomain.ru/user/Maildir/ /cur /new /tmp dovecot.index dovecot.index.cache dovecot.index.log 2. Postfix MTA receives message for that user and places it at /var/mail/virtual/mydomain.ru/user/Maildir/new/1179145269.V43I3f5a4M116738.host.mydomain.local 3. POP3-client tries to receive mail: May 14 16:23:09 host dovecot: pop3-login: Login: user=<user(a)mydomain.ru>, method=PLAIN, rip=192.168.0.100, lip=192.168.0.3 May 14 16:23:09 host dovecot: POP3(user(a)mydomain.ru): Disconnected: Logged out top=0/0, retr=1/786, del=1/1, size=770 >>>>> dovecot creates file dovecot-uidlist with next_uid=1 (!!!): 1 1179145056 1 1 1179145269.V43I3f5a4M116738.host.mydomain.local:2, Message fetched successfully. 4. POP3-client tries to receive mail: May 14 16:23:29 host dovecot: pop3-login: Login: user=<user(a)mydomain.ru>, method=PLAIN, rip=192.168.0.100, lip=192.168.0.3 May 14 16:23:29 host dovecot: POP3(user(a)mydomain.ru): UID larger than next_uid in file /var/mail/virtual/mydomain.ru/user/Maildir/dovecot-uidlist (1 >= 1) May 14 16:23:29 host dovecot: POP3(user(a)mydomain.ru): Disconnected: Logged out top=0/0, retr=0/0, del=0/0, size=0 File dovecot-uidlist disappears. 5. Postfix MTA receives message for that user and places it at /var/mail/virtual/mydomain.ru/user/Maildir/new/1179145534.V43I3f5a4M116827.host.mydomain.local 6. POP3-client tries to receive mail: May 14 16:47:20 host dovecot: pop3-login: Login: user=<user(a)mydomain.ru>, method=PLAIN, rip=192.168.0.100, lip=192.168.0.3 May 14 16:47:20 host dovecot: POP3(user(a)mydomain.ru): Disconnected: Logged out top=0/0, retr=0/0, del=0/0, size=0 Dovecot creates file dovecot-uidlist: 1 1179145056 2 1 1179145534.V43I3f5a4M116827.host.mydomain.local Dovecot moves message from new to cur directory and adds flag ":2,": /var/mail/virtual/mydomain.ru/user/Maildir/cur/1179145534.V43I3f5a4M116827.host.mydomain.local:2, Message not fetched. And POP3 client can't fetch it at all. All next messages fetches normally as they arrives. # /usr/local/etc/dovecot.conf protocols: pop3 pop3s ssl_cert_file: /etc/ssl/certs/host.mydomain.ru.crt ssl_key_file: /etc/ssl/private/host.mydomain.ru.key disable_plaintext_auth: no login_dir: /var/run/dovecot/login login_executable: /usr/local/libexec/dovecot/pop3-login login_greeting: POP3 server ready verbose_proctitle: yes first_valid_gid: 0 mail_extra_groups: mail mail_location: maildir:~/Maildir mail_executable: /usr/local/libexec/dovecot/pop3 mail_plugin_dir: /usr/local/lib/dovecot/pop3 pop3_uidl_format: %08Xu%08Xv pop3_client_workarounds: outlook-no-nuls oe-ns-eoh auth default: mechanisms: plain login digest-md5 cram-md5 apop ntlm default_realm: mydomain.ru passdb: driver: pam passdb: driver: passwd-file args: /etc/auth/%d/passwd userdb: driver: passwd userdb: driver: static args: uid=5000 gid=5000 home=/var/mail/virtual/%d/%n socket: type: listen client: path: /var/spool/postfix/private/auth mode: 432 user: postfix group: postfix master:

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[Dovecot] imap-login: Disconnected: Connection queue full
by Ralf Hildebrandt 16 May '07

16 May '07

I'm getting "imap-login: Disconnected: Connection queue full:" messages like these: May 16 12:17:26 postamt dovecot: imap-login: Disconnected: Connection queue full: rip=160.45.172.202, lip=141.42.4.250 May 16 12:17:26 postamt dovecot: imap-login: Disconnected: Connection queue full: rip=141.42.165.160, lip=141.42.4.250, TLS May 16 12:18:23 postamt dovecot: imap-login: Disconnected: Connection queue full: rip=193.175.70.61, lip=141.42.4.250 Should I worry about these messages or are they of informational character only? Does it mean that the imap-login encountered more than "login_max_connections" and thus a new process had to be spawned? Is there a parameter I should be changing (config below) # /usr/local/sbin/dovecot --version 1.0.0 ---- snip --- # /usr/local/etc/dovecot.conf protocols: imap imaps pop3s ssl_cert_file: /etc/ssl/certs/postamt.pem ssl_key_file: /etc/ssl/private/postamt.key 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 login_process_per_connection: no login_process_size: 64 login_max_connections: 32 verbose_proctitle: yes mail_location: maildir:~/Maildir mail_read_mmaped: yes fsync_disable: yes maildir_copy_with_hardlinks: yes maildir_copy_preserve_filename: 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_plugins(default): quota imap_quota mail_plugins(imap): quota imap_quota mail_plugins(pop3): quota 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 imap_client_workarounds(default): outlook-idle netscape-eoh imap_client_workarounds(imap): outlook-idle netscape-eoh imap_client_workarounds(pop3): outlook-idle pop3_lock_session(default): no pop3_lock_session(imap): no pop3_lock_session(pop3): yes pop3_uidl_format(default): pop3_uidl_format(imap): pop3_uidl_format(pop3): %v-%u pop3_client_workarounds(default): pop3_client_workarounds(imap): pop3_client_workarounds(pop3): outlook-no-nuls oe-ns-eoh namespace: type: private separator: . prefix: INBOX. inbox: yes auth default: passdb: driver: pam userdb: driver: passwd plugin: quota: maildir quota: maildir:ignore=Trash ---- snip --- -- Ralf Hildebrandt (i.A. des IT-Zentrums) Ralf.Hildebrandt(a)charite.de Charite - Universitätsmedizin Berlin Tel. +49 (0)30-450 570-155 Gemeinsame Einrichtung von FU- und HU-Berlin Fax. +49 (0)30-450 570-962 IT-Zentrum Standort CBF send no mail to plonk(a)charite.de

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[Dovecot] Login with firstname.lastname instead of loginname
by Ralf Hildebrandt 16 May '07

16 May '07

Some of our users use to login as firstname.lastname or firstname.lastname(a)charite.de instead of using the "correct" "flastname" login name. In order to get this behaviour a long-gone co-worker wrote an authdaemon.pl, which speaks the courier-authdaemon protocol. How can I emulate this behaviour with dovecot? Basically, all I need is a usernamen mapping ala: Ralf.Hildebrandt(a)charite.de rhilde Ralf.Hildebrandt rhilde for all my users -- I can generate this programatically using awk, but how can I make dovecot use that? -- Ralf Hildebrandt (i.A. des IT-Zentrums) Ralf.Hildebrandt(a)charite.de Charite - Universitätsmedizin Berlin Tel. +49 (0)30-450 570-155 Gemeinsame Einrichtung von FU- und HU-Berlin Fax. +49 (0)30-450 570-962 IT-Zentrum Standort CBF send no mail to plonk(a)charite.de

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[Dovecot] Sorting by Received vs Sent
by Bill Boebel 16 May '07

16 May '07

Looks like in Cyrus, sorting by Received date is faster than sorting by the Sent header date because of the way they use the index and cache files... http://www.emaildiscussions.com/showpost.php?p=419246 Is this the case in Dovecot as well? Bill

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[Dovecot] deleted Messages don't go into Trash Folder always
by Rainer Sigl 16 May '07

16 May '07

Hi all, most of the time deleted messages aren't moved into trash folder but go into nirwana. Sometimes it works correctly. But a restart does not guarantee this function. This effect exists with different imap clients. Can anybody help please. Rainer Sigl -- ----------------- Rainer Sigl, | email: sigl(a)mpe.mpg.de MPI f. extraterrestrische Physik, | phone: +49 (89) 30000-3557 Postfach 1312, | fax: +49 (89) 30000-3569 D-85741 Garching, Germany | web: http://www.mpe.mpg.de/~sigl/

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[Dovecot] List problems?
by Charles Marcus 16 May '07

16 May '07

Hi Timo, Sorry to bother you, but I'm used to having at least 10-20 in the morning. This morning there are none... and the last one is from 3:00pm yesterday? So, this is a test, I guess... -- Best regards, Charles

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[Dovecot] Deliver sending bounces from 'MAILER-DAEMON@'
by Erland Nylend 16 May '07

16 May '07

Hello, I'm having a problem with postfix and/or dovecots "deliver". I'm getting these lines in the mail log: | Apr 24 11:42:08 smtp2 postfix/qmgr[6176]: 05BAE3B67E: from=<>, size=3055, nrcpt=1 (queue active) | Apr 24 11:42:08 smtp2 postfix/qmgr[6176]: 05BAE3B67E: to=<MAILER-DAEMON@>, relay=none, delay=0.01, delays=0.01/0.01/0/0, dsn=5.1.3, status=bounced (bad address syntax) After some debugging, it seems that those lines in the log appear if I send mail to an account which is over quota. (I'm using the Maildir++ quota) This is from my dovecot.conf: | protocol lda { | postmaster_address = MAILER-DAEMON(a)my.domain.tld | mail_plugins = quota | auth_socket_path = /var/run/dovecot/auth-master | hostname = my.mail.server | sendmail_path = /usr/sbin/sendmail | } It seems to me that dovecot is sending bounce messages from 'MAILER-DAEMON@' .. Does anyone know why this is happening, or how I can specify the address to be used? I'm using dovecot 1.0.0. -- Erland Nylend

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[Dovecot] assertion failed
by Adrian Stoica 15 May '07

15 May '07

What is this ? dovecot: Apr 24 13:03:29 Error: IMAP(tina.burdujan): file maildir-sync.c: line 1075 (maildir_sync_index): assertion failed: (uid >prev_uid) dovecot: Apr 24 13:03:29 Error: IMAP(tina.burdujan): Raw backtrace: /usr/libexec/dovecot/imap [0x80b8741] -> /usr/libexec/dovecot/imap [0x80b819c] -> /usr/libexec/dovecot/imap(maildir_sync_index+0x898) [0x80695f8] -> /usr/libexec/dovecot/imap [0x80698b3] -> /usr/libexec/dovecot/imap(maildir_ storage_sync_init+0x49) [0x8069aa9] -> /usr/libexec/dovecot/imap(imap_sync_init+0x40) [0x8062620] -> /usr/libexec/dovecot/imap(cmd_sync+0x71) [0x8 062b81] -> /usr/libexec/dovecot/imap(cmd_noop+0x26) [0x8059c76] -> /usr/libexec/dovecot/imap [0x805be7f] -> /usr/libexec/dovecot/imap [0x805bf20] -> /usr/libexec/dovecot/imap(_client_input+0x6c) [0x805c0fc] -> /usr/libexec/dovecot/imap(io_loop_handler_run+0xff) [0x80bef6f] -> /usr/libexec/do vecot/imap(io_loop_run+0x36) [0x80be366] -> /usr/libexec/dovecot/imap(main+0x46c) [0x806448c] -> /lib/libc.so.6(__libc_start_main+0xb9) [0xb7eb4e1 9] -> /usr/libexec/dovecot/imap [0x80568b1] dovecot: Apr 24 13:03:29 Error: child 25748 (imap) killed with signal 6 My conf is: exim + dovecot + mysql exim deliver mail to maildir , because i don't know how to use LDA from dovecot. the maildirs are very large, for one account could be 30000 mails. dovecot is version 1.0.0 dovecot -n shows: # /etc/dovecot.conf base_dir: /var/run/dovecot/login log_path: /var/log/mail.log login_dir: /var/run/dovecot login_executable: /usr/libexec/dovecot/imap-login login_process_per_connection: no login_process_size: 80 login_processes_count: 10 login_max_processes_count: 50 login_max_connections: 80 first_valid_uid: 1001 last_valid_uid: 1001 mail_extra_groups: exim,vmail mail_location: maildir:%Lh/Maildir mail_cache_min_mail_count: 1 dotlock_use_excl: yes fsync_disable: yes maildir_copy_with_hardlinks: yes maildir_copy_preserve_filename: yes mail_drop_priv_before_exec: yes mail_executable: /bin/imap.sh mail_plugins: quota imap_quota auth default: mechanisms: PLAIN CRAM-MD5 default_realm: testing.net cache_size: 256 worker_max_count: 100 passdb: driver: sql args: /etc/dovecot-crammd5.conf userdb: driver: prefetch plugin: quota: maildir

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