July 2006 - dovecot - dovecot.org

[Dovecot] Bug#377840: dovecot: imap segfaults on small mbox files (2 bytes)
by Roland Stigge 10 Aug '06

10 Aug '06

Package: dovecot Severity: important Tags: patch Hi, a recent addition in src/lib-storage/index/mbox/istream-raw-mbox.c: ======================================================================================== [...] if (pos == 2) { /* we're at the end of file with CR+LF linefeeds? need more data to verify it. */ rstream->input_peak_offset = stream->istream.v_offset + pos; return _read(stream); } [...] ======================================================================================== makes my imap process crash, resulting in repeatedly spawned (and killed) processes in my log file: ======================================================================================== [...] Jul 11 15:31:04 localhost dovecot: imap-login: Login: user=<ernie>, method=plain, rip=127.0.0.1, lip=127.0.0.1, secured Jul 11 15:31:04 localhost dovecot: child 31284 (imap) killed with signal 11 Jul 11 15:31:04 localhost dovecot: child 31287 (imap) killed with signal 11 Jul 11 15:31:04 localhost dovecot: imap-login: Login: user=<ernie>, method=plain, rip=127.0.0.1, lip=127.0.0.1, secured Jul 11 15:31:05 localhost dovecot: imap-login: Login: user=<ernie>, method=plain, rip=127.0.0.1, lip=127.0.0.1, secured Jul 11 15:31:05 localhost dovecot: child 31293 (imap) killed with signal 11 Jul 11 15:31:05 localhost dovecot: imap-login: Login: user=<ernie>, method=plain, rip=127.0.0.1, lip=127.0.0.1, secured Jul 11 15:31:05 localhost dovecot: child 31296 (imap) killed with signal 11 Jul 11 15:31:05 localhost dovecot: child 31299 (imap) killed with signal 11 Jul 11 15:31:05 localhost dovecot: imap-login: Login: user=<ernie>, method=plain, rip=127.0.0.1, lip=127.0.0.1, secured Jul 11 15:31:06 localhost dovecot: child 31310 (imap) killed with signal 11 Jul 11 15:31:07 localhost dovecot: imap-login: Login: user=<ernie>, method=plain, rip=127.0.0.1, lip=127.0.0.1, secured Jul 11 15:31:07 localhost dovecot: imap-login: Login: user=<ernie>, method=plain, rip=127.0.0.1, lip=127.0.0.1, secured Jul 11 15:31:07 localhost dovecot: child 31313 (imap) killed with signal 11 Jul 11 15:31:07 localhost dovecot: child 31316 (imap) killed with signal 11 Jul 11 15:31:07 localhost dovecot: imap-login: Login: user=<ernie>, method=plain, rip=127.0.0.1, lip=127.0.0.1, secured [...] ======================================================================================== This is caused by the infinite recursive loop made by the "return _read(stream);" The problem is triggered in my mbox directories because I have .svn/format files lying around (mail under svn revision control). In this case, the file is 2 bytes long: ======================================================================================== ernie@dent:~/Mail$ hexdump -C .svn/format 00000000 34 0a |4.| 00000002 ======================================================================================== The attached patch (guarding against eof) is a reasonable workaround. bye, Roland -- System Information: Debian Release: testing/unstable APT prefers unstable APT policy: (500, 'unstable'), (1, 'experimental') Architecture: i386 (i686) Shell: /bin/sh linked to /bin/bash Kernel: Linux 2.6.17-1-686 Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8) (ignored: LC_ALL set to en_GB.UTF-8)

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[Dovecot] Something other than dotlock for uidlist locking?
by James Berry 10 Aug '06

10 Aug '06

If I read the code correctly, only dotlocks are supported for locking of dovecot-uidlist. And I don't see any settings in the config file for it. As it turns out, dotlocks are very slow on my system, due to their implementation via hardlinks. Would it be possible to support other locking mechanisms for locking of the uidlist file? -jdb

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Re: [Dovecot] LIST command ignores "hidden=yes" for default namespace
by Bill Boebel 06 Aug '06

06 Aug '06

On Sun, June 11, 2006 1:51 pm, Timo Sirainen <tss(a)iki.fi> said: > On Mon, 2006-05-08 at 22:03 -0400, Bill Boebel wrote: >I'm not sure if this is a bug or just an undesirable feature, but when I >have our namespace configured to match Courier's "INBOX." functionality, >Dovecot forces me to also define a default namespace (with no prefix). >Without the default namespace defined I get "NO Unknown namespace." errors >when trying to subscribe or unsubscribe folders. > > It was a bug when tb-extra-mailbox-sep workaround was enabled. Fixed: > http://dovecot.org/list/dovecot-cvs/2006-June/005709.html > The second part of this still seems to be the case with RC2... the LIST command ignores "hidden=yes". http://www.dovecot.org/list/dovecot/2006-May/013253.html Running with the following namespace settings causes a LIST comand to show the folder listing twice, once the INBOX. prefix and once without. But it should only be listing the folders with the prefix since hidden=yes on the second. The patch I listed in my original post fixes it in RC2 as well. namespace private { separator = . prefix = INBOX. inbox = yes location = maildir:%h } namespace private { separator = . prefix = inbox = no hidden = yes location = maildir:%h }

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[Dovecot] Dovecot IMAP and Mac OS X Mail.app
by Ronny Adsetts 04 Aug '06

04 Aug '06

Hi All, I recently switched our Courier IMAP server over to Dovecot primarily for performance reasons. Server OS is Debian Sarge with Dovecot packages from backports.org (v 1.0.rc2-1bpo1). Access from Thunderbird and Horde worked fine with some shared folders defined and the Courier compatibility private folder stanza. Initial testing with Mail.app showed that, although the folder listing was fetched correctly including all shared folders, no mail could be viewed with Mail.app timing out with an error about invalid namespace. (I'll post the exact error message as a follow up when I can test again later). After searching the mailing list for a while, I came upon a message suggesting adding a second private namespace like so: namespace private { separator = . prefix = "INBOX." inbox = yes hidden = no } namespace private { separator = . prefix = inbox = yes hidden = yes } Now, this does work in a fashion and allows Mail.app to access the folders and mail. Problem with this config: * Mail.app displays all INBOX. folders at the top level *and* below Inbox * Thunderbird displays a spurious INBOX folder in the folder listing under Inbox. * Horde displays folders at the top level and below Inbox. Whilst not being a huge problem for our internal mail server, this is not optimal. Has anyone else had these or similar problems and managed to work them out? If so, how did you configure Dovecot or the clients to all play nicely together? I'd quite like to roll Dovecot out on our client mail server but I need to work this out first so any help is appreciated. Thanks. Ronny -- Ronny Adsetts Technical Director Amazing Internet Ltd, London t: +44 20 8607 9535 f: +44 20 8607 9536 w: www.amazinginternet.com

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[Dovecot] Can't change permissions for /var/spool/postfix/dovecot.index.log
by James Brown 03 Aug '06

03 Aug '06

For some reason i can't change the permissions on /var/spool/postfix/ dovecot.index.log from postfix to dovecot, or anything else. I changed all the files in /var/spool/postfix to be owner postfix so that postfix wouldn't complain about insufficient priviledges. I'm running MacOS X 10.4.7. I can change it all I want, but the owner and group changes do not 'stick' - they simply stay at postfix. Does anyone have any ideas? Can I have the index and index.log files elsewhere? Thanks, James.

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[Dovecot] Quota with dict backend - sql does not get registered
by David Jonas 02 Aug '06

02 Aug '06

Hello everyone, I've been working with the quota plugin, attempting to use the dict backend. It seems the sql dict class is not getting loaded. I dropped a couple lines in dict_class_lookup(dict.c) and it seems the only class that gets loaded is "proxy". Any idea how to get the sql driver to load in the quota/dict module? My authentication goes through the sql module and is working perfectly, so I know that the module and db are talking in general. I've scoured the documentation and dug through the code but I can't seem to discover the solution. There is "Dynamic SQL drivers" in the compiling from source section: http://wiki.dovecot.org/CompilingSource#line-158 I compiled the driver_mysql.so, copied it to lib/dovecot/, symlinked it into auth/, imap/, pop3/ and lda/, then tried-- but it still only showed "proxy" as being loaded. After that I added it to the mail_plugins list, mail_plugins = driver_mysql quota but it didn't like that and spat out some linking errors: Edlopen(/usr/local/dovecot-1.0.rc2/lib/dovecot/imap/driver_mysql.so) failed: /usr/local/dovecot-1.0.rc2/lib/dovecot/imap/driver_mysql.so: undefined symbol: sql_not_connected_result So, where do I go from here? Any insights would be appreciated and I'll keep digging. Regards, David

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[Dovecot] dovecot-1.0.rc2 hangs while copying to Sent
by Jack Bailey 31 Jul '06

31 Jul '06

Hello, Since running dovecot-1.0.rc2, tbird occasionally hangs when it's copying outbound mail to the Sent folder. Running beta8 and earlier I never saw this problem. Anyone know what's up and how to fix it? Thanks, Jack -- http://banners.wunderground.com/banner/gizmotimetemp/US/CA/San_Diego.gif

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[Dovecot] Public Namespace & ACL & Virtual Users
by Fintec 31 Jul '06

31 Jul '06

Background: I am wanting to create shared folders (public namespace) with access control lists on the sub directories. Our implementation of dovecot (v1.0b7) uses many virtual users and domains and 1 actual user (vmail), all using maildir. So far I have successfully created the public namespace (Public_Folders) which every user can access but I'm having difficulty restricting access using ACls. When trying to implement the dovecot ACL plug-in I followed the wiki instructions and created a "dovecot-acl" file within Public_Folders containing: owner lrwstiekxa user=user1(a)domain.com lrwstiek However this doesn't appear to do anything. All users can still access Public_Folders so I have a couple of questions that hopefully someone can help me with... 1) Is it possible to use the dovecot's ACL plug-in on a Public name space? 2) Is it possible to create dovecot-acl files with virtual usernames, i.e. user1(a)domain.com or does it have to be actual users, i.e. vmail? 3) Is it possible to restrict access within the namespace definition, i.e. set up another public namespace restricted to manager(a)domain.com? 4) Is ACL accepts & denies logged somewhere other than /var/log/maillog (my default)? 4) Is anyone successfully set-up an environment with a public namespace and ACLs? Any help would be greatly appreciated. Gavin

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[Dovecot] Dovecot and Sun's Directory Server
by Brian Hechinger 31 Jul '06

31 Jul '06

I've got Sun's Directory Server 5.2 installed here, and I would like to have dovecot use it for virtual users. I have the following questions: a) How do I get dovecot to link to DS's libraries? Am I better off just building OpenLDAP client libraries and linking dovecot with them instead? b) how about password-hash {CRYPT} in the OpenLDAP config file? Do I need to do anything to make DS5.2 do that for me the right way? c) Schema. Can I use the OpenLDAP schema? Does DS5.2 have the correct schema for my needs? Which exact schema does dovecot use? Maybe I can check and see what's in there and what needs to be added/extended. I think that's it for now. ;) -brian

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[Dovecot] Dovecot copy with imapsync
by Stephan Holl 31 Jul '06

31 Jul '06

Hi List, I am trying to migrate my dovecot 0.9 (mbox-Storage) to 1.0rc2 with maildir-storage using imapsync. I cannot manage to copy the emails from one server to the other, however the dry-run from imapsync works nicely. Is it possible to make dovecot more verbose to see what is happening (or not happening)? Thank you very much. Best Stephan

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