December 2011 - dovecot

[Dovecot] Make entire mailbox read-only (ACLs?)
by David Jonas 10 Dec '11

10 Dec '11

Hello, Is there a way of locking a mailbox, effectively making it read-only to IMAP clients? I've read through http://wiki2.dovecot.org/ACL. I created dovecot-acl with the content "owner lr" in .INBOX which seems to keep me from copying messages into the folder, but not out. I have the plugin configured correctly, it seems, since MYRIGHTS command shows the correct value: 30 MYRIGHTS "INBOX" * MYRIGHTS "INBOX" lr Am I barking up the wrong tree? Is there an easier way to lock a mailbox? post-login scripting perhaps? Thanks!

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[Dovecot] Major bug with hardlinks and lmtp
by Brad Schuetz 10 Dec '11

10 Dec '11

In working on trying to fix the crash issue from my last email I had enabled LMTP delivery to try it out instead of using the LDA. I have discovered that when a single piece of email is to be delivered to multiple users the message is being hard linked instead of copied into each mail box. This is a major problem that makes LMTP unusable in an environment where each mailbox has it's own UID since the hard linked file will only be readable by one of the users. I assume this is related to "maildir_copy_with_hardlinks=yes", however this setting doesn't say anything about hardlinking across different email accounts. -- Brad Schuetz

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[Dovecot] Per-User MySQL Quota (postfixadmin)
by Sehic, Haris 09 Dec '11

09 Dec '11

Hi, need some help setting per-user quota and postfixadmin. Setup is working on 1.2 dovecot. Tryin 2.1 dovecot now, quota is working but overriden quota rule set by 'user_query =' in /etc/dovecot/dovecot-sql.conf.ext takes no efffekt. What's wrong here? Greets Haris

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[Dovecot] Wish list item: %g/%{gid} variable
by Pascal Volk 09 Dec '11

09 Dec '11

I think it would be very useful to have a user's GID in a variable. So i could use for example: mail_attachment_dir = /srv/mail/.SiS/%{gid} I use one GID per domain and the aliases fqhns of the domain. When for example example.com would be an alias for exmaple.net (gid: 12345), the attachments would be stored inside /srv/mail/.SiS/12345/, no matter if a message was sent to john.doe(a)example.com or to john.doe(a)example.net. "quota = dict:domain:%{gid}:proxy::quota" would then also work. Regards, Pascal -- The trapper recommends today: c01dcofe.1134217(a)localdomain.org

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[Dovecot] "Unstable" vs "Development" vs "Nightly"
by Terry Carmen 09 Dec '11

09 Dec '11

I'm currently running v2.1rc1, but have been seeing errors like: Dec 8 11:31:55 it kernel: auth[18914]: segfault at 48 ip 00fe2f74 sp bfcaccd0 error 4 in libauthdb_imap.so[fdd000+f000] The unstable and nightly builds are newer, but are they likely to be more or less stable than the version I'm currently running? I'd like to install a newer version, but am trying to get a feel for how usable they're likely to be. Thanks, Terry

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[Dovecot] Error: Corrupted index cache file /xxx/yyy/zzz/indexes/.INBOX/dovecot.index.cache: invalid record size
by florent＠coppint.com 09 Dec '11

09 Dec '11

Hi all, I got a problem with a Dovecot IMAP/POP installation. Since a recent failure of our distributed file system (no loss of data btw), Dovecot seems to have a problem with index cache files. For a lot of accounts, I have this error in logs: Error: Corrupted index cache file /xxx/yyy/zzz/indexes/.INBOX/dovecot.index.cache: invalid record size If I delete all files from /indexes/ directory, it still occurs... Do you see what can cause this problem ? Or what information can I provide to help ? Our distributed FS is MooseFS. Dovecot is configured like if it was NFS (no mmap, etc...). Thank you for your help :) Flo

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Re: [Dovecot] sql dict: commit failed: MySQL server has gone away
by Mark Zealey 08 Dec '11

08 Dec '11

Thanks Timo, this patch applied clean against 2.0.16 just running it on live for the past few minutes & seems to have fixed the issues. Mark ________________________________________ From: Mark Zealey Sent: 08 December 2011 07:14 To: Timo Sirainen Cc: dovecot(a)dovecot.org Subject: RE: [Dovecot] sql dict: commit failed: MySQL server has gone away Correct we're not enforcing the quotas at present just want an easy way to monitor everyone's mailbox usage. Thanks for the patch; will it work ok against 2.0.16? if so I'll recompile and give it a test today. Mark

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[Dovecot] 2.1.rc1 (1e118913348b): Panic: file mail-user.c: line 128 (mail_user_ref): assertion failed: (user->refcount > 0)
by Pascal Volk 08 Dec '11

08 Dec '11

Hi Timo, right after delivering the message to the INBOX the lmtp crashes. I wonder about the "Sent" in the attached backtrace. Regards, Pascal -- The trapper recommends today: c01dcofe.1134117(a)localdomain.org

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[Dovecot] problems when using dsync between servers
by Yann Dupont 08 Dec '11

08 Dec '11

Hello, I'm trying to migrate from maildir++ to mdbox. The maildir++ is a leftover of our previous setup (was using courier) We have 3 virtuals servers for our +70000 accounts. Now, I'd like to use mdbox, so I'm trying using dsync for that. I setup a new virtual server, configured for mdbox. 1st, I tried a basic setup: I established a file with all my accounts (taken from LDAP) and then I use this script : FILENAME=$1 while read LINE do dsync -u $LINE backup $LINE@my_new_server done < $FILENAME But it's quite slow and dsync hangs. So I tried another approach using multi threaded python. Much faster (using all the cores), but dsync still hangs on some accounts. After a certain time dsync exit with an error like that : Panic: file dsync-worker-local.c: line 1688 (local_worker_save_msg_continue): assertion failed: (ret == -1) dsync-remote(E072184L): Error: Raw backtrace: /usr/lib/dovecot/libdovecot.so.0(+0x3fd8a) [0x7f34fc577d8a] -> /usr/lib/dovecot/libdovecot.so.0(default_fatal_handler+0x32) [0x7f34fc577e72] -> /usr/lib/dovecot/libdovecot.so.0(i_error+0) [0x7f34fc55119f] -> dsync() [0x40ff0b] -> dsync() [0x410142] -> dsync(dsync_worker_msg_save+0x99) [0x40f639] -> dsync() [0x40e24a] -> dsync() [0x40d8ef] -> dsync() [0x40dbfc] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_call_io+0x48) [0x7f34fc5830d8] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run+0x9f) [0x7f34fc58403f] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_run+0x28) [0x7f34fc583068] -> /usr/lib/dovecot/libdovecot.so.0(master_service_run+0x13) [0x7f34fc5713a3] -> dsync(main+0x9e1) [0x4078b1] -> /lib/libc.so.6(__libc_start_main+0xfd) [0x7f34fbde9c4d] -> dsync() [0x406cf9] This is on a RUNNNING server. My aim was to make some pass on the running server, then stop it and make a last pass to finish the process. Is dsync supposed to run only on a stopped server ? Is my approach totally wrong ? -- Yann Dupont - Service IRTS, DSI Université de Nantes Tel : 02.53.48.49.20 - Mail/Jabber : Yann.Dupont(a)univ-nantes.fr

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[Dovecot] sql dict: commit failed: MySQL server has gone away
by Mark Zealey 08 Dec '11

08 Dec '11

Following on from this thread: http://www.dovecot.org/list/dovecot/2010-September/052704.html <https://owa2010.webfusion.com/owa/redir.aspx?C=a447887e3d204944a8c766142df4…> in 2.0.16 I am seeing the same issues. I believe this would be related to some timeouts set on our mysql servers which are pretty low (30 or 60 seconds or so to drop idle connections). This is happening for imap, pop and lmtp processes when they try to update quotas stored in a mysql database; presumably it is the dict process that actually has these issues - the lmtp delivery isn't lasting longer than 1 second so shouldn't be seeing any timeouts there. This is always followed by the "Error: dict quota: Quota update failed, it's now desynced" line; presumably it is telling the truth but I'm not sure how I could tell. We are also seeing this "MySQL server has gone away" issue in login processes but it isn't causing an issue there as presumably dovecot transparently retries rather than just giving up as it seems to in the quota updates. Any thoughts or advice would be appreciated. Mark

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