September 2009 - dovecot

[Dovecot] odd dovecot / spampal interaction
by gyre 07 Sep '09

07 Sep '09

[Apologies if you've seen this message twice. I originally sent it from another e-mail account but it never seemed to appear on the list for me.] Apologies if this has been mentioned before. I've searched quite a few of the archives, but haven't found an answer. I've just installed dovecot 1.1.6 on my qnap server, and have found an odd interaction with spampal that I've not seen before using other imap servers. Let me attempt to explain. On the mail server machine, I use XMail to pull in new messages from my external pop3 mail account. These messages are then visable to dovecot's imap server. On my mail client machine, I have a spampal proxy between outlook express and the imap server. So, when I wish to read mail, outlook express connects to the spampal proxy and spampal then connects to the dovecot imap server. That all works fine until a message that spampal thinks is spam arrives. spampal instructs the dovecot imap server to move the message from Inbox to the Spam folder and then expunge Inbox. However, erroneously, a random message in my Inbox now seems to lose its seen flag. So if I have 5 new spam messages arrive, all 5 get moved from Inbox to Spam, but correspondingly 5 messages in the middle of my Inbox are now apparently not seen, so outlook express says there are 5 unseen messages, and lets me move down to them. It's almost as if the flags for the Spam folder are being applied to the Inbox folder instead. I've used wireshark to capture an example session of this happening when 2 spam messages arrive, in the hope that somebody wiser than I can work out what is going wrong, and where. Any help gratefully received. Thanks. -- gyre --

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[Dovecot] Problems with sieve
by Stefan Onken 07 Sep '09

07 Sep '09

Hello, I am trying to setup an Email Server with Exim, dovecot and sieve support. I am not sure about the settings for Sieve, right now its's not working properly: user: test3(a)gewaltphantasien.de maildir: /var/mails/gewaltphantasien.de/test3 I have the .dovecot.sieve file in the root dir of the users emails: root@ubuntu:/var/mails/gewaltphantasien.de/test3# cat /var/mails/gewaltphantasien.de/test3/.dovecot.sieve require "vacation"; vacation # Reply at most once a day to a same sender :days 1 :subject "Out of office reply" # List of additional recipient addresses which are included in the auto replying. # If a mail's recipient is not the envelope recipient and it's not on this list, # no vacation reply is sent for it. :addresses ["test3(a)gewaltphantasien.de", "john.doe(a)company.dom"] "I'm out of office, please contact Joan Doe instead. Best regards John Doe"; Incoming email looks like: Sep 5 15:45:01 ubuntu deliver(test3(a)gewaltphantasien.de): auth input: maildir=gewaltphantasien.de/test3 Sep 5 15:45:01 ubuntu deliver(test3(a)gewaltphantasien.de): auth input: uid=1001 Sep 5 15:45:01 ubuntu deliver(test3(a)gewaltphantasien.de): auth input: gid=1001 Sep 5 15:45:01 ubuntu deliver(test3(a)gewaltphantasien.de): Home dir not found: Sep 5 15:45:01 ubuntu deliver(test3(a)gewaltphantasien.de): maildir: data=/var/mails/gewaltphantasien.de/test3 Sep 5 15:45:01 ubuntu deliver(test3(a)gewaltphantasien.de): maildir++: root=/var/mails/gewaltphantasien.de/test3, index=, control=, inbox=/var/mails/gewaltphantasien.de/test3 !!!! Sep 5 15:45:01 ubuntu deliver(test3(a)gewaltphantasien.de): cmusieve: /.dovecot.sieve doesn't exist !!!! Sep 5 15:45:01 ubuntu spamd[15032]: prefork: child states: II Sep 5 15:45:01 ubuntu deliver(test3(a)gewaltphantasien.de): msgid=: saved mail to INBOXf saved mail to INBOX Sieve settings in dovecot.conf: sieve=/var/mails/%d/%n/.dovecot.sieve sieve_storage=/var/mails/%d/%n/sieve Any ideas ? Thanks! -- www.stonki.de www.proftpd.de www.kbarcode.net www.krename.net

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[Dovecot] deliver command
by AMP Admin 05 Sep '09

05 Sep '09

It seems deliver is taking up a lot of cpu. Is there a way to throttle just the delivery command?

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[Dovecot] offlineimap with dovecot: file-time is one hour in the future
by Dieter Faulbaum 04 Sep '09

04 Sep '09

I use offlineimap to sync my remote IMAP-server with my local IMAP-server (maildir format). But I don't understand this behavior: every new mail in the INBOX has a file-date which is one hour in the future. Is this 'normal'? Is this a problem of offlineimap? I tried this debugging (for dovecot): mail_executable = /usr/lib/dovecot/rawlog /usr/lib/dovecot/imap and this (for offlineimap): offlineimap -d imap,maildir,thread -l ~/offlineimap.log But I can't find any helpful information in these files, which shows me what went wrong. Has anyone a better technique or a hint how to find out what caused this (little) problem? -- Dieter Faulbaum

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[Dovecot] v2.0 configuration parsing
by Timo Sirainen 04 Sep '09

04 Sep '09

I'm trying to figure out how exactly v2.0 should be parsing configuration files. The most annoying part is if it should always just "use whatever comes first in config" or try some kind of a "use most specific rule". The "most specific" kind of makes more sense initially, but then you start wondering how to handle e.g.: 1) User logs in to imap from 192.168.0.1. What is foo's value? protocol imap { remote_ip 192.168.0.0/16 { foo = foo } } remote_ip 192.168.0.0/24 { foo = bar } 2) User logs in from 192.168.0.1 to 10.1.2.3. What is foo's value? local_ip 192.168.0.1 { remote_ip 10.1.2.0/24 { foo = foo } } remote_ip 10.1.2.3 { local_ip 192.168.0.0/24 { foo = bar } } Any thoughts?

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[Dovecot] imap and pop3 benchmark
by Thomas G. Lau 04 Sep '09

04 Sep '09

Dear All, does anyone got any program which could benchmark imap and pop3 in terms of message per second?

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[Dovecot] quota-dirsize and mailbox rules
by Thanos Chatziathanassiou 04 Sep '09

04 Sep '09

I noticed that the dirsize backend for quota didn't support any rules and figured it should be easy enough to add ``ignore'' at least. Using mbox storage and only tested with that, but it seems to work as expected for the time being. I'm attaching a relatively small patch for quota-dirsize.c against dovecot-1.1.18 just in case anyone's interested. Best Regards, Thanos Chatziathanassiou

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[Dovecot] IMAP timeout problem
by Vasantha Narayan 04 Sep '09

04 Sep '09

Hello, We are running dovecot 1.1.2 on a Solaris 10 box. We have been running the same configuration for about a year without a problem. We have a different cert for POP and IMAP. Recently we made two changes. The cert for IMAP expired and we had to install a new one. We applied some patches to the SAN disks that hosts the mail partition. These changes were made over a weekend and the system was rebooted. There were no errors in the logs and everything worked fine until the following Monday morning when IMAP connections increased. When IMAP ports started getting hammered in the morning, IMAP clients started getting "IMAP time out" errors. When this error occurs, IMAP freezes and IMAP clients such as, Thunderbird and Squirrelmail are not able to connect to the IMAP server (both IMAP and IMAPS). We cannot get a telnet connection to the IMAP port or a openssl connection to the IMAPS port. Kill -HUP of the dovecot server solves the problem. But again, when the usage increases, the problem surfaces again. There is no problem with POP or POPS. It continues to function normally while IMAP times out and freezes two or three times a day. Any clue where the problem might be? The debug log does not have any useful pointers. Thanks. Vasantha

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[Dovecot] External auth database process
by Aaron Roberts 04 Sep '09

04 Sep '09

Hi, Is it possible to call a completely external process to authenticate users in dovecot? I am trying to setup a transparent pop3 proxy that will lookup users from a couple of different pop3 servers, authenticate to 1 of them, take a copy of the password and a timestamp and client IP upon success, then proxy to the appropriate end server. I was hoping I would be able to do something along the lines of: dovecot.conf: passdb external args = /usr/scripts/dovecot_auth.pl %u %w The perl script would then carry out the various tasks and return the host and destuser for proxying. Thanks in advance, Aaron

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[Dovecot] libvpopmail.so
by Noris Luigi 03 Sep '09

03 Sep '09

hello, I have qmail with vpopmail configured with 2 domains configured. the pop3 service is granted with vpopmail and the authentication function. I need imap for access to mailboxes in maildir format and courier do not support anymore vpopmail. i have find dovecot from a link on the inter7 site. I have downloaded, compiled and configured. when i start dovecot i recevei always this error in maillog file: Aug 21 16:54:48 mailx2 dovecot: Dovecot v1.2.4 starting up (core dumps disabled) Aug 21 16:54:48 mailx2 dovecot: auth(default): dovecot-auth: error while loading shared libraries: libvpopmail.so: cannot open shared object file: No such file or directory Aug 21 16:54:48 mailx2 dovecot: dovecot: child 22664 (auth) returned error 127 Aug 21 16:54:48 mailx2 dovecot: dovecot: Fatal: Auth process died too early - shutting down I do not undestand if there is a place where can i put libvpopmail.so manually, or specify the position of this file becaust the file exist and is normally in /home/vpopmail/lib/ and accessible in read from all. under there is my configuration. thx in adv GG my configuration: root@mailx2:/usr/local/src/qmail/dovecot-1.2.4# dovecot -n # 1.2.4: /usr/local/etc/dovecot.conf # OS: Linux 2.6.27.7-smp i686 Slackware 12.2.0 base_dir: /var/run/dovecot/ protocols: imap ssl: no disable_plaintext_auth: no login_dir: /var/run/dovecot/login login_executable: /usr/local/libexec/dovecot/imap-login first_valid_uid: 89 last_valid_uid: 89 first_valid_gid: 89 last_valid_gid: 89 mail_uid: 89 mail_gid: 89 mail_location: maildir:~/Maildir lda: postmaster_address: postmaster(a)example.com auth default: debug: yes passdb: driver: vpopmail userdb: driver: vpopmail

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