- dovecot - dovecot.org

[Dovecot] Dovecot vs Exim file locking
by Daniel Campos 21 Dec '09

21 Dec '09

Hi all: We're planning to deploy a large e-mail system storing maildirs in a NAS system through NFS. One of the options we're thinking on is using Dovecot+EXIM. As far as I've read in both project's documentation, both services implement locking allowing multiple servers to access the same maildirs in order to distribute the service load. However, I can't find any information explaining whether both locking mechanisms are compatible, whether any additional configuration is needed both in Dovecot and/or EXIM, or even whether any locking synchronization between both services is needed/recommendable at all. The only remote clue I've found is that, according to Dovecot docs: "Because Dovecot uses its own non-standard locking (dovecot-uidlist.lock dotlock file), other MUAs accessing the maildir don't support it." (but EXIM is not a MUA, anyway) Anyhow theoretically MailDir could even be considered free of locking problems, but I'm not sure of the real implications of putting together several Exim and Dovecot installations pointing to the same NFS filesystem. Any knowledge/experience/link/clue on this would be greatly appreciated. Thanks in advance, Daniel Campos

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[Dovecot] deliver panics when handling mails bigger than some kByte
by Leon Meßner 19 Dec '09

19 Dec '09

Hi, i've just upgraded to dovecot-1.2.8 (from 1.2.4) and do now get the following errors when deliver gets hands on mails with some attachments. # tail -n 1 /var/log/messages Dec 14 19:00:36 mail3 dovecot: deliver(user): Panic: file istream.c: line 96 (i_stream_read): assertion failed: (stream->eof) The MTA is postfix running inside a FreeBSD 7.2-STABLE jail. The homes where deliver should put mails are mounted via NFS. As it works with small attachments perhaps this is related to the message size. However i don't get the "stale NFS file handle" error any more which i did under 1.2.4 (See thread that begins with: Message-ID: <20091016122519.GC6309(a)emmi.physik-pool.tu-berlin.de> ) Greetings, Leon

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[Dovecot] "Filename keeps changing" issue
by Paul Ezvan 19 Dec '09

19 Dec '09

Hello, I have been experiencing a issue for a while with dovecot 1.2.8 : Dec 4 12:54:00 gen1 dovecot: IMAP(paul): maildir_file_do(/home/paul/Maildir/.Travail.Linux.Arch Linux/cur/1224250603.M73770P8724.gen0:2,): Filename keeps changing Dec 4 12:54:01 gen1 dovecot: IMAP(paul): Disconnected: Internal error occurred. Refer to server log for more information. [2009-12-04 12:53:59] bytes=4445/26986 So I can't get the messages in this directory neither with Evolution neither with Horde neither with Squirrelmail, but it works with roundcubemail. How can I debug this ? dovecot -n # 1.2.8: /etc/dovecot/dovecot.conf # OS: Linux 2.6.31-ARCH i686 protocols: imap imaps pop3 pop3s managesieve ssl_cert_file: /etc/ssl/certs/ezvan.fr.pem ssl_key_file: /etc/ssl/private/ezvan.fr.key login_dir: /var/run/dovecot/login login_executable(default): /usr/lib/dovecot/imap-login login_executable(imap): /usr/lib/dovecot/imap-login login_executable(pop3): /usr/lib/dovecot/pop3-login login_executable(managesieve): /usr/lib/dovecot/managesieve-login login_process_per_connection: no mail_location: maildir:~/Maildir mail_executable(default): /usr/lib/dovecot/imap mail_executable(imap): /usr/lib/dovecot/imap mail_executable(pop3): /usr/lib/dovecot/pop3 mail_executable(managesieve): /usr/lib/dovecot/managesieve mail_process_size: 0 mail_plugin_dir(default): /usr/lib/dovecot/modules/imap mail_plugin_dir(imap): /usr/lib/dovecot/modules/imap mail_plugin_dir(pop3): /usr/lib/dovecot/pop3 mail_plugin_dir(managesieve): /usr/lib/dovecot/modules/managesieve imap_client_workarounds(default): outlook-idle imap_client_workarounds(imap): outlook-idle imap_client_workarounds(pop3): imap_client_workarounds(managesieve): lda: postmaster_address: postmaster(a)ezvan.fr mail_plugins: sieve sieve_global_path: /var/sieve/global auth default: passdb: driver: pam userdb: driver: passwd socket: type: listen client: path: /var/run/dovecot/auth-client mode: 432 master: path: /var/run/dovecot/auth-master mode: 384 plugin: sieve: ~/.dovecot.sieve sieve_storage: ~/sieve Thanks for help ! Paul Ezvan

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[Dovecot] dovecot: pipe() failed: Too many open files
by JW 19 Dec '09

19 Dec '09

In the past few months we've been having increasing problems with dovecot timing out pop3 logins. As best I can tell it gets to the point where it won't accept any new pop3 logins. The error in the mail log is: dovecot: pipe() failed: Too many open files I've researched this problem a number of times, usually I see suggestions to increase ulimit. I've done this a number of times, all the way up to: ulimit -n 8192 I've put that in the init script right above the daemon start line. So far it hasn't helped. In addition, when looking at lsof, it doesn't seem like we're anywhere near the actual limit. for example, last time dovecot only had 1032 files open. Does anyone have any idea what could be causing the error? Or what else I can try to figure this out? Thank you, JW -- ---------------------- System Administrator - Cedar Creek Software http://www.cedarcreeksoftware.com

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[Dovecot] Release candidates for Sieve v0.1.14 and ManageSieve v0.11.10 for Dovecot v1.2.8
by Stephan Bosch 19 Dec '09

19 Dec '09

Hello Dovecot users, I am getting closer to new releases for Sieve and ManageSieve for Dovecot v1.2.8. However, the release for Sieve includes a large restructuring of the sources to improve extension handling and to remove global state. That is why I first provide a few pre-releases for you to check first: Sieve http://www.rename-it.nl/dovecot/1.2/dovecot-1.2-sieve-0.1.14pre.tar.gz http://www.rename-it.nl/dovecot/1.2/dovecot-1.2-sieve-0.1.14pre.tar.gz.sig ManageSieve http://www.rename-it.nl/dovecot/1.2/dovecot-1.2-managesieve-0.11.10pre.tar.… http://www.rename-it.nl/dovecot/1.2/dovecot-1.2-managesieve-0.11.10pre.tar.… Check the NEWS files in the respective repositories for other changes included in these releases: http://hg.rename-it.nl/dovecot-1.2-sieve/file/216f58aae5c1/NEWS http://hg.rename-it.nl/dovecot-1.2-managesieve/file/a44ca0d89875/NEWS Feel free to test these release candidates and please notify me when you incur any problems. The real releases will follow this weekend. Regards, -- Stephan Bosch stephan(a)rename-it.nl

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[Dovecot] Maildir on NFS - attribute caching question
by Brandon Davidson 18 Dec '09

18 Dec '09

Hi Timo, We've been running Dovecot with Maildir on NFS for quite a while - since back in the 1.0 days I believe. I'm somewhat new here. Anyway... The Wiki article on NFS states that 1.1 and newer will flush attribute caches if necessary with mail_nfs_storage=yes. We're running 1.2.8 with that set, as well as mail_nfs_index=yes, mmap_disable=yes and fsync_disable=no. We have a pool of POP/IMAP and SMTP machines that are accessing the maildirs, and can't guarantee any sort of user session affinity to a particular host. We also mount our NFS shares with 'noac', which is what I'm writing to ask about. I'd like to stop doing that for performance reasons. Do you see any issues with taking that out of the mount options, given our environment? Thanks, -Brad

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[Dovecot] lot's of timeouts
by Götz Reinicke - IT-Koordinator 18 Dec '09

18 Dec '09

Hi, since some time ago we do have a lot of "timeouts" connecting to our imap/po3 server. This week I switched the whole system to a new dual quadcore xeon, 24GB RAM, SAS2 RAID-10. (SUN Fire 4170) But the mailclients (mostly thunderbird and apple mail) still reporte the timeouts by accessing the mailboxes. The server is doing smtp, imap/pop3, webmailsystem and spam/antivirus-checking all together. (RH EL 5, sendmail, horde, mysql, mailscanner, spamassassin) We use the original RH dovecot-1.0.7, mbox-format and mailboxes up to 4 GB ... (historicaly grown ...) So where to start debugging the imap/pop3 timeouts? What information may I provide, which doc may I read? Thanks for helping me to find and fix the problem. Best regards Götz -- Götz Reinicke IT-Koordinator Tel. +49 7141 969 420 Fax +49 7141 969 55 420 E-Mail goetz.reinicke(a)filmakademie.de Filmakademie Baden-Württemberg GmbH Akademiehof 10 71638 Ludwigsburg www.filmakademie.de Eintragung Amtsgericht Stuttgart HRB 205016 Vorsitzende des Aufsichtsrats: Prof. Dr. Claudia Hübner Staatsrätin für Demographischen Wandel und für Senioren im Staatsministerium Geschäftsführer: Prof. Thomas Schadt

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[Dovecot] v2.0.beta1 released
by Timo Sirainen 18 Dec '09

18 Dec '09

http://dovecot.org/releases/2.0/beta/dovecot-2.0.beta1.tar.gz http://dovecot.org/releases/2.0/beta/dovecot-2.0.beta1.tar.gz.sig Now that v2.0 is in beta stage I don't expect anything big to change anymore. The configuration and the APIs shouldn't change in non-backwards compatible ways. There are still bugs left to be fixed and some small features to be implemented, but I'd like to have people start testing it more. The biggest unimplemented "feature" is how to convert v1.x configuration easily/automatically to v2.0. Either the old config file should be translated to new one, or Dovecot should be able to read the old config file as-is. I think I like the translation better, so that people won't still be using v1.x configuration when v2.1 arrives and drops v1.x support. Largest changes since alpha3: - if some IP address is failing authentications, all auth attempts from the IP are delayed increasingly. a successful auth drops the delay. max delay is 15 seconds. this is enforced by auth process, so it works across different connections/processes/protocols. - lib-storage plugin API changed. processes handling multiple users now support different plugins for different users. - expire plugin's settings work a bit differently now: http://hg.dovecot.org/dovecot-2.0/rev/46691becc45e - post-login scripting works again, see http://dovecot.org/list/dovecot/2009-December/045139.html - Tons of fixes

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[Dovecot] Upgrade 1.0->1.2 dbox mysql
by Bradley Giesbrecht 17 Dec '09

17 Dec '09

Seems to work but it's weird that I lost my subscribed folders. Also the perl script imapsync is only seeing an inbox and no other folders. I seem to be creating a lot of name mailboxes where my INBOX and other folders are located. /opt/local/var/mail/domain.com/username/dbox/mailboxes This dir is getting populated with new INBOX and default folders. (domain.com and username are substitutes for the real users domain and username) dovecot.log: Dec 17 12:29:17 IMAP(username(a)domain.com): Info: Effective uid=5000, gid=5000, home=/opt/local/var/mail/domain.com/username Dec 17 12:29:17 IMAP(username(a)domain.com): Info: dbox: data=/opt/local/ var/mail/domain.com/username/dbox Dec 17 12:29:17 IMAP(username(a)domain.com): Info: fs: root=/opt/local/ var/mail/username.com/username/dbox, index=, control=, inbox= dovecot-deliver.log: Dec 17 12:35:08 deliver(username(a)domain.com): Info: auth input: home=/ opt/local/var/mail/domain.com/username Dec 17 12:35:08 deliver(username(a)domain.com): Info: auth input: uid=5000 Dec 17 12:35:08 deliver(username(a)domain.com): Info: auth input: gid=5000 Dec 17 12:35:08 deliver(username(a)domain.com): Info: dbox: data=/opt/ local/var/mail/domain.com/username/dbox Dec 17 12:35:08 deliver(username(a)domain.com): Info: fs: root=/opt/ local/var/mail/domain.com/username/dbox, index=, control=, inbox= Dec 17 12:35:08 deliver(username(a)domain.com): Info: msgid=<E5136D91-256C-4FD8-87AE-065C95DEAA58(a)gmail.com >: saved mail to INBOX Could someone confirm that this looks right? Thank you, Bradley Giesbrecht

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[Dovecot] Upgrade 1.0->1.2 dbox mysql
by Bradley Giesbrecht 17 Dec '09

17 Dec '09

Hi, I just upgraded to from dovecot v1.1.15 to v1.2.9 so I can use dovecot- sieve. Most everything seems to work but my webmail (roundcube) clients are not seeing their subscribed folders. Reading over the upgrade docs at http://wiki.dovecot.org/Upgrading/1.2 I'm wondering if I have the two settings below configured correctly. dovecot.conf: mail_location = dbox:/opt/local/var/mail/%d/%n/dbox dovecot_mysql.conf user_query homedir result: /opt/local/var/mail/example.com/foo bash-3.2# dovecot -n # 1.2.9: /opt/local/etc/dovecot/dovecot.conf # OS: Darwin 9.8.0 Power Macintosh hfs log_path: /opt/local/var/serveza/log/mail/dovecot.log protocols: imap imaps pop3 pop3s disable_plaintext_auth: no verbose_ssl: yes login_dir: /opt/local/var/run/dovecot/login login_executable(default): /opt/local/libexec/dovecot/imap-login login_executable(imap): /opt/local/libexec/dovecot/imap-login login_executable(pop3): /opt/local/libexec/dovecot/pop3-login login_greeting: now what? mail_location: dbox:/opt/local/var/serveza/mail/%d/%n/dbox mail_debug: yes mail_executable(default): /opt/local/etc/dovecot/bin/log_imap_login.sh mail_executable(imap): /opt/local/etc/dovecot/bin/log_imap_login.sh mail_executable(pop3): /opt/local/etc/dovecot/bin/log_pop3_login.sh mail_plugin_dir(default): /opt/local/lib/dovecot/imap mail_plugin_dir(imap): /opt/local/lib/dovecot/imap mail_plugin_dir(pop3): /opt/local/lib/dovecot/pop3 lda: log_path: /opt/local/var/serveza/log/mail/dovecot-deliver.log auth_socket_path: /opt/local/var/run/dovecot/auth-master postmaster_address: postmaster(a)pixilla.com auth default: mechanisms: plain login cram-md5 ntlm apop verbose: yes debug: yes debug_passwords: yes passdb: driver: sql args: /opt/local/etc/dovecot/dovecot_mysql.conf userdb: driver: prefetch userdb: driver: sql args: /opt/local/etc/dovecot/dovecot_mysql.conf socket: type: listen client: path: /opt/local/var/spool/postfix/private/auth mode: 432 user: _postfix group: _postfix master: path: /opt/local/var/run/dovecot/auth-master mode: 384 user: _vmail Thanks for any clues, Bradley Giesbrecht

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