March 2009 - dovecot - dovecot.org

[Dovecot] Random timeouts on mailboxes
by Bastien Semene 10 Mar '09

10 Mar '09

Hello, My dovecot server is currently having random issues when users want to acces their mailbox. When the issue is occuring there's a timeout. It's random because it happens more or less often and is not dependent on a user or the way their check the mailbox. The time during the problem occurs is random, sometimes it's less than a minute, sometimes it's some hours. When a user can't connect to its mailbox, he generally can receive its emails through his BlackBerry (it's just to illustrate the fact that it doesn't seem to be linked to an account). When this issue occurs they can't receive the headers from any folder (INBOX, custom, sent, ...) and can't read mails that headers are known by the mail client. When there's timeout, users can send emails (same jail and with an error when the client want to write a copy in the sentbox) and use the calendar server for example (on the same machine). Dovecot is running on a FreeBSD 7.0 32bits, 4GB RAM, Intel Xeon QuadCore @ 1.86 Ghz, and 3*500Gb SATA-2 RAID-5 disks. The box is hosting jails, and the mail jails ( imap + smtp, clamav + spamassassin ). The mail jails are new (since August 2008) but worked great since the beginning of this year. The server is hosting 122 accounts currently. My first thought was that there's an I/O issue, the disks are maybe too busy or there's paging that result in a timeout. I check it through vmstat an top commands but nothing appears, there's always some memory free (between 90-300 MB) and a very little paging, generally around 1MB. The fault are under a hundred and when, few times, it has more than a hundred (generally under 200) the next snapshot is under 100. I set the screen/line to refresh every 5 seconds. I shutdowned all jails not directly related to the mail service but the problem still occured. I also separated clamav and spamassassin from imap and smtp to a different box. After that I checked the dovecot config to lighten it, and ( only ) disabled fsync. I upgraded the RAM, added memory is used, but nothing changed. The human resources are constantly changing here, we were more before the problem started than now (around 10-15%), to illustrate the fact that I don't think it is linked to the number of users. I tried to recreate some accounts having the issue, but the problem appeared again. I upgraded Dovecot Friday to 1.1.11 from 1.1.7 (The installation was before 1.1.7, I did an upgrade some times ago). I used a command script to log Thunderbird's IMAP activity, everything is fine but there's no timestamp in the logs. So I'm only sure now this is not an erroneous packet/info sent problem. I watched the TB doc ( http://www.mozilla.org/projects/nspr/reference/html/prlog.html#25306 ) but there's no directive to put a timestamp for each line of log. The network is fine. I tried different configuration to be sure a device isn't doing something weird. Now, I don't know what to check to identify the issue. If anyone has any idea I didn't wrote here, or if I did erroneous interpretation(s) from the datas, I'll be glad to know. Regards, -- Bastien Semene Administrateur Réseau & Système

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[Dovecot] POP3 Error
by Jeff Grossman 10 Mar '09

10 Mar '09

I just looked over my logs and noticed the following error: Mar 9 19:07:34 apple dovecot: Panic: POP3(april): Trying to allocate 0 bytes Mar 9 19:07:34 apple dovecot: POP3(april): Raw backtrace: pop3 [0x492952] -> pop3 [0x4929d3] -> pop3 [0x4920e6] -> pop3 [0x49cb8d] -> pop3(client_create+0x452) [0x41aef2] -> pop3(main+0x393) [0x41c9e3] -> /lib/libc.so.6(__libc_start_main+0xe6) [0x7f6bb46e11a6] -> pop3 [0x41a1b9] Mar 9 19:07:34 apple dovecot: child 9616 (pop3) killed with signal 6 Here is my dovecot -n: # 1.2.beta1: /usr/local/etc/dovecot.conf # OS: Linux 2.6.26-1-amd64 x86_64 Debian squeeze/sid base_dir: /var/run/dovecot/ protocols: imap imaps pop3 pop3s ssl_cert_file: /etc/ssl/certs/stikman-godaddy.crt ssl_key_file: /etc/ssl/private/stikman-godaddy.key ssl_cipher_list: ALL:!LOW:!SSLv2 disable_plaintext_auth: no login_dir: /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 mail_location: maildir:~/Maildir 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 auth default: mechanisms: plain login passdb: driver: pam userdb: driver: passwd plugin: sieve: sieve What other information would you need from me? Jeff

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[Dovecot] I'm the beginner and I want some help
by Wei Da 10 Mar '09

10 Mar '09

Hello, I'm a software programmer and I work for a software corporation. We worked on dovecot for a while. We want to add some new functions to dovecot. For example, the mail stored on Mail-Server is plaintext, so we want to make it encrypted. As the documentation was not too much, and read the source code was too difficult for em. Would you give me some advice if I make this specialty as a plugin? Thank you! WD David from China.

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[Dovecot] Deliver error - fdatasync_path
by Daniel L. Miller 09 Mar '09

09 Mar '09

I see the following history in my log during message delivery: Mar 1 13:35:09 mailserver postfix/pickup[21464]: 5FAFC2A002: uid=0 from=<root> Mar 1 13:35:09 mailserver postfix/cleanup[21526]: 5FAFC2A002: message-id=<20090301213509.5FAFC2A002(a)mailserver.amfeslan.local> Mar 1 13:35:09 mailserver postfix/qmgr[21429]: 5FAFC2A002: from=<root(a)mailserver.amfeslan.local>, size=367, nrcpt=1 (queue active) Mar 1 13:35:09 mailserver dovecot: auth(default): master in: USER^I1^Idmiller(a)amfes.com^Iservice=deliver Mar 1 13:35:09 mailserver dovecot: auth(default): master out: USER^I1^Idmiller@amfes.com^Iuid=5000^Igid=8^Ihome=/var/mail/amfes.com/dmiller^Imail=dbox:/var/mail/amfes.com/dmiller/Maildir Mar 1 13:35:10 mailserver deliver(dmiller(a)amfes.com): fdatasync_path(/var/mail/amfes.com/dmiller/Maildir/INBOX/dbox-Mails) failed: Invalid argument Mar 1 13:35:10 mailserver deliver(dmiller(a)amfes.com): msgid=<20090301213509.5FAFC2A002(a)mailserver.amfeslan.local>: saved mail to INBOX Mar 1 13:35:10 mailserver postfix/pipe[21528]: 5FAFC2A002: to=<dmiller(a)amfes.com>, relay=dovecot, delay=1.1, delays=0.07/0.01/0/1, dsn=2.0.0, status=sent (delivered via dovecot service) Mar 1 13:35:10 mailserver postfix/qmgr[21429]: 5FAFC2A002: removed -- Daniel

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Re: [Dovecot] Random timeouts on mailboxes
by listacc＠gmx.de 09 Mar '09

09 Mar '09

Hi Bastien, just a little thought because I had an issue like this (but with cyrus): Where is your thunderbird installation stored? In my case, it was not locally but on some windows mapped drive, and so also the imap cache of thunderbird was on this drive. Because we have a lot of mails in our accounts, the cache was about 50-100MB for some users, and users with a lot mail accounts had very often timeouts. This was due to performance problems on our network storage. Sometimes it also works to delete thunderbird´s cache files. Then it has to download all the headers again (bad with bad performing network storage :-/), but it seems that these cache files get corrupted from time to time and this also produces timeouts. kind regards Andreas -- Computer Bild Tarifsieger! GMX FreeDSL - Telefonanschluss + DSL für nur 17,95 Euro/mtl.!* http://dsl.gmx.de/?ac=OM.AD.PD003K11308T4569a

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[Dovecot] Using account alias as login
by Javier Amor García 09 Mar '09

09 Mar '09

Hello, I use dovecot with a LDAP backend for user account and aliases. The aliases are objects of the class couriermailalias. Some users would like to use the alias address as POP/IMAP login instead of the 'true' account. Is this possible?. I am using dovecot version 1.0,10, from ubuntu hardy packages. Thanks for any answer, Javier

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[Dovecot] fs quota on xfs dir tree? is this implemented?
by Pawel Eljasz 09 Mar '09

09 Mar '09

cheers

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[Dovecot] Dovecot and Pipermail integration
by Ricardo Ramirez 09 Mar '09

09 Mar '09

Hello, I have a standard Mailman/Pipermail install with mboxes at MM_HOME/archives/public/listname.mbox/listname.box What's the best way to export these via IMAP using Dovecot 1.0rc15 on Debian etch? I know I could make a namespace with MM_HOME/archives/public/ but that would result in half of the directories being exported (the ones containing the HTML archives) being unusable. I could also create another directory and symlink all the mboxes in there but that seems wrong. Preferably, I'd like to have something like a namespace with a mail location of MM_HOME/archives/public/*.mbox/ but that doesn't work with v1.0 Ricardo

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[Dovecot] Which email clients support SMTP/IMAP via STDIN&STDOUT of proxy command?
by Andrzej Adam Filip 08 Mar '09

08 Mar '09

Which email clients support SMTP/IMAP via STDIN&STDOUT of proxy command? I would like to be able to use local and remove dovecot to access maildir *without* running dovecot daemons. -- [pl>en: Andrew] Andrzej Adam Filip : anfi(a)onet.eu If the future navigation system [for interactive networked services on the NII] looks like something from Microsoft, it will never work. -- Chairman of Walt Disney Television & Telecommunications

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[Dovecot] hwo can i have managesieve protocol and cmusieve plugin work at the same time
by Jelle de Jong 08 Mar '09

08 Mar '09

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hello everybody, I would like to use managesieve protocol and cmusieve plugin at the same time. I have used the cmusieve plugin for years and I now also enabled the managesieve system. I got the managesieve system working but when I activate the managesieve filter for the user the cmusieve sieve filter is not used anymore. How can I have both sieve systems working, the cmusieve is for a global all user spam filter, and the managesieve is for one user only. I don't want the user to have control over the spam sieve filter, because other systems depend on the location where spam is archived. Below are my configurations: - ------------------------------------------------------------------------ root@ashley:~# cat /etc/dovecot/dovecot.conf protocols = imap imaps managesieve mail_location = maildir:/home/vmail/%d/%n ssl_cert_file = /etc/tls/powercraft.nl/powercraft.nl-certificate.pem ssl_key_file = /etc/tls/powercraft.nl/powercraft.nl-privatekey.pem protocol lda { auth_socket_path = /var/run/dovecot/auth-master postmaster_address = postmaster(a)powercraft.nl # hostname = ashley mail_plugins = cmusieve global_script_path = /home/vmail/system/scripts/sieve/x-spam-flag.sieve } protocol managesieve { # Specify an alternative address:port the daemon must listen on # (default: *:2000) #listen = localhost:2000 # sieve=~/.dovecot.sieve sieve_storage=/home/vmail/sieve/%d/%n } auth default { mechanisms = plain passdb sql { args = /etc/dovecot/dovecot-sql.conf } userdb static { args = uid=5000 gid=5000 home=/home/vmail/%d/%n } socket listen { master { path = /var/run/dovecot/auth-master mode = 0600 user = vmail } client { path = /var/spool/postfix/private/auth mode = 0660 user = postfix group = postfix } } } - ------------------------------------------------------------------------ cat /home/vmail/system/scripts/sieve/x-spam-flag.sieve require "fileinto"; if header :contains ["X-Spam-Flag"] ["YES"] { fileinto "archive.spam"; } - ------------------------------------------------------------------------ root@ashley:~# ls -hal /home/vmail/powercraft.nl/jelledejong/.dovecot.sieve* lrwxrwxrwx 1 vmail vmail 75 2009-03-08 12:07 /home/vmail/powercraft.nl/jelledejong/.dovecot.sieve -> /home/vmail/sieve/powercraft.nl/jelledejong/jelledejong.powercraft.nl.sieve - -rw------- 1 vmail vmail 688 2009-03-08 13:54 /home/vmail/powercraft.nl/jelledejong/.dovecot.sievec - ------------------------------------------------------------------------ root@ashley:~# cat /home/vmail/sieve/powercraft.nl/jelledejong/jelledejong.powercraft.nl.sieve require "fileinto"; if header :contains ["List-Id"] ["debian-devel.lists.debian.org"] { fileinto "mailinglists.debian-devel"; } if header :contains ["List-Id"] ["debian-mentors.lists.debian.org"] { fileinto "mailinglists.debian-mentors"; } if header :contains ["List-Id"] ["debian-embedded.lists.debian.org"] { fileinto "mailinglists.debian-embedded"; } if header :contains ["List-Id"] ["dovecot.dovecot.org"] { fileinto "mailinglists.dovecot"; } if header :contains ["X-Mailing-List"] ["linux-usb(a)vger.kernel.org"] { fileinto "mailinglists.linux-usb"; } - ------------------------------------------------------------------------ Somebody that know how to have both sieve filters systems working? Best regards, Jelle de Jong -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) iJwEAQECAAYFAkmzwr8ACgkQ1WclBW9j5Hn6wwQAlNWgpMQSjOm6mEErjd4CoOVQ gapOO74IC3zc3oJKLpA8cmxhzZs3RtRCuCruyuyAX5CMhvM41EE78jYUVhmkx7Br IDKHGSiex4qjkuJ9O6fDrLwETaDrFHrgQ8i2EkPtMjB+/B7T/3CR7ZzGc4gXKL+J GCTqaIor9y3efy672ic= =hPIn -----END PGP SIGNATURE-----

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