- dovecot - dovecot.org

[Dovecot] Segfault in imap process
by Todd Burroughs 25 Mar '05

25 Mar '05

We've been testing dovecot for a while and I noticed yesterday that imap crashes quite often. It seems to be about even with SIGABRT and SIGSEGV. This one was SIGSEGV. Our system is SuSE Linux 9.2, 2.6.11.5 kernel (also happened with an older 2.6 kernel). Dovecot version is 1.0-test64 and was compiled with: "./configure --prefix=/services/dovecot --disable-ipv6" It's using mbox over NFS and I've configured "mmap_disable = yes". The mailbox that it crashed on is one of our support mailboxes and it is pretty busy. In the last 1/2 hour, it received over 100 emails. I had a look at the code, but didn't notice anything obvious. Thanks for any help... Here's the log messages: dovecot: Mar 22 18:22:23 Error: 19697 IMAP(support): UIDVALIDITY changed (1111532787 -> 1111533642) in mbox file /mailhome/new/s/support/mbox dovecot: Mar 22 18:22:26 Error: child 19697 (imap) killed with signal 11 and a backtrace: mail201:/services/dovecot/var/log # gdb /services/dovecot/libexec/dovecot/imap imap.core.pid19697 GNU gdb 6.2.1 Copyright 2004 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Type "show copying" to see the conditions. There is absolutely no warranty for GDB. Type "show warranty" for details. This GDB was configured as "i586-suse-linux"...Using host libthread_db library "/lib/tls/libthread_db.so.1". Core was generated by `imap'. Program terminated with signal 11, Segmentation fault. warning: current_sos: Can't read pathname for load map: Input/output error Reading symbols from /lib/libdl.so.2...done. Loaded symbols for /lib/libdl.so.2 Reading symbols from /lib/tls/libc.so.6...done. Loaded symbols for /lib/tls/libc.so.6 Reading symbols from /lib/ld-linux.so.2...done. Loaded symbols for /lib/ld-linux.so.2 #0 0x08079f14 in mail_cache_sync_lost_handler (index=0x0) at mail-cache-sync-update.c:152 152 file_cache_invalidate(index->cache->file_cache, 0, (uoff_t)-1); (gdb) bt #0 0x08079f14 in mail_cache_sync_lost_handler (index=0x0) at mail-cache-sync-update.c:152 #1 0x0807bcfb in mail_index_map (index=0x80c24e8, force=0) at mail-index.c:792 #2 0x0807c870 in mail_index_try_open (index=0x80c24e8, lock_id_r=0xbffff68c) at mail-index.c:1064 #3 0x0807c9cf in mail_index_open (index=0x80c24e8, flags=5, lock_method=MAIL_INDEX_LOCK_FCNTL) at mail-index.c:1219 #4 0x08076025 in index_storage_mailbox_init (storage=0x80b7b90, box=0x80ac920, index=0x80c24e8, name=0x80a292f "INBOX", flags=Variable "flags" is not available. ) at index-storage.c:330 #5 0x08067cd8 in mbox_open (storage=0x80b7b90, name=0x80a292f "INBOX", flags=0) at mbox-storage.c:510 #6 0x08067ea4 in mbox_mailbox_open (_storage=0x80b7b90, name=0x80a292f "INBOX", flags=0) at mbox-storage.c:557 #7 0x08089305 in mailbox_open (storage=0x0, name=0x80a292f "INBOX", flags=0) at mail-storage.c:292 #8 0x08057ace in _cmd_select_full (cmd=0x80b7e80, readonly=0) at cmd-select.c:32 #9 0x08057ca1 in cmd_select (cmd=0x80b7e80) at cmd-select.c:99 #10 0x08059145 in _client_input (context=0x80b7e40) at client.c:334 #11 0x08099eca in io_loop_handler_run (ioloop=0x80b69e8) at ioloop-poll.c:184 #12 0x080995e9 in io_loop_run (ioloop=0x80b69e8) at ioloop.c:218 #13 0x0805fea7 in main (argc=1, argv=0xbffffa24, envp=0xbffffa2c) at main.c:229 (gdb) Todd Burroughs

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Fw: [Dovecot] Auto Create Folders
by Chris L. Franklin 24 Mar '05

24 Mar '05

>> the problem might be: what would your mta do if: >> 1. the user never logged in via imap okay, so then they would never get there mail ? I guess I don't see where your going with this problem. >> 2. therefor no folders were created by dovecot .... Ok ?? >> 3. it has to deliver a spam message to the spam folder. Your right the filter would put it into the spam folder, witch it would created if it's not found. And as a side note the "Spam" folder was just a example folder name. Really for are needs it would be a folder called "Meetings" >> "so you have to ensure the folder existance at the user creation level >> imho. thats the logical point to do exactly that. >> checking for folder existance everytime a user might access a service is >> stupid. it costs at least a stat() call per directory." Some how you missed the part.I'd like to make sure this use always has this folder. Aka if they delete it, I'd like it to be recreated. PS. In the end all's it comes down to is i was wounder if there was a way to have dovecot auto create a folder or a list of folders at login. OR really if there was a way to tell dovecot a list of folders a user COULD NOT delete (But could delete the folders in side). -- Chris L. Franklin --

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[Dovecot] dovecot-ldap with tls
by ck 24 Mar '05

24 Mar '05

hi all, Can somebody help me to find out how to use dovecot to connect to my ldap server which has the tls support? Currently I'm using my dovecot to connect to ldap without tls and soon my ldap server will apply the tls and all others server have to connect through the tls. thanks a lot. CK from Malaysia

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[Dovecot] automatic flag updates
by Aaron VanDevender 24 Mar '05

24 Mar '05

Is there a way to get dovecot to send automatic flag updates? I notice that when I have two clients connected and one of them reads a new message, the server sends a status update which contains the number of unseen messages, but doesn't specifically say which ones have changed. I think the solution to this problem, while not wasting bandwidth, is to issue a unilateral FETCH FLAGS response whenever a flag changes. There doesn't seem to be a way to get dovecot (I'm using 0.99.10) to do this. Can the 1.0-test versions do this? cya .sig

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[Dovecot] stable assert error
by Paul Jongsma 23 Mar '05

23 Mar '05

Hello, When moving a message from my inbox to an existing mailbox folder I get: dovecot: Mar 21 12:52:48 Error: IMAP(paulj): file istream-raw-mbox.c: line 383 (istream_raw_mbox_get_body_size): assertion failed: (rstream->body_offset != (uoff_t)-1) dovecot: Mar 21 12:52:48 Error: child 10265 (imap) killed with signal 6 This after moving from 0.99 to 1.0 stable on 5.3-RELEASE-p5 Client is Apple Mail program Anything I can do to fix or investigate? Thanks Paul

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[Dovecot] Hide non-accessable folder from users
by Remy Zandwijk 22 Mar '05

22 Mar '05

Hi all, In our faculty, people keep asking about shared mail folders. With Dovecot up and running this should be no problem. I think we will have about 50 shared folders. I did take a look at the various solutions, but not all of them are useable. For example, I do not want users to create sub-folders in shared folders. This means the symlink option is unuseable. In my opinion, the easiest solution is creating a namespace and create the shared folders in the location of this namespace. Every shared folders gets his own UNIX group ID. Offcourse, this works great. The ony big disadvantage is that every users 'sees' all shared mailfolders, even if the user does not have the proper rights to access the folders. Is there a way to hide the non-accessable folders from users? Best regards, Remy Zandwijk

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Re: [Dovecot] Auto Create Folders
by Chris L. Franklin 22 Mar '05

22 Mar '05

To make sure users have certain folders. -- Chris L. Franklin --

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[Dovecot] strange email client problems
by Gabriel Granger 22 Mar '05

22 Mar '05

I've got some issues with dovecot, that I need to resolve, I only have about 20 users in the office, but the average disk space used by each user is anywhere from 1GB up to at the extreme end of the scale 7GB. I'm using the mailbox format. The server is a P4 2.8 with a 1GB of ram and run off 250GB SATA disks. most users have lots of structured folders going as deep as 6 levels. The problems I'm getting are odd the problems that I'm getting at the moment are "cannot copy mail to sent folder", but sends the message fine, this doesn't happen all the time but happens to everyone but me... I'm using OS X's Mail.app which seems to always work:) all my users are using W2K and either ThunderBird or Mozilla The other problem which I've been made aware of... The users get the "loading message" or "opening messages" and the egg timer goes round but never completes. I managed to clear the problem by getting the user to close their email client and then kill their IMAP processes on the server, when the user logs in again the client responds correctly. Is there something I'm doing wrong with the configuration of dovecot? would using MailDir help, I dont want to migrate from Mailbox unless this change will make things better, I understand their are benefits from using MailDir, but I dont know if I will continue to see the same problems if I migrate. Any help or advise would be great, I should add that everyone is connecting to the server over SSL Gabe

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[Dovecot] emulating courier imap
by Geo Carncross 21 Mar '05

21 Mar '05

I'm trying this: default_mail_env = maildir:%h/.maildir:INDEX=%h/.indexes:INBOX=% h/.maildir namespace private { separator = . prefix = INBOX. inbox = no } namespace private { separator = . prefix = inbox = yes hidden = yes } but dovecot doesn't appear to be honoring "hidden" - am I missing something? (that is, all my folders appear twice- one under INBOX, the other under root) I tried without the second segment, and makign the first one "inbox=yes" - but then I got two inboxes... -- Internet Connection High Quality Web Hosting http://www.internetconnection.net/

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[Dovecot] Mixing mbox and maildir
by Tom Alsberg 21 Mar '05

21 Mar '05

Hi there. I understood that in Dovecot 1.0 it should be possible to mix the usage of mbox and maildir mailboxes. I just downloaded, built, and am testing dovecot-stable-20050304. I'm a bit confused as to the terms of namespaces (haven't read that part of the RFC yet), but this does not seem related. Anyway, when I try specifying: default_mail_env = ~/mail/:INBOX=/var/mail/%u On login I'm immediately disconnected, seeing something like: dovecot: IMAP(user): Failed to create storage with data: ~/mail:INBOX=/var/mail/user in the log file. This seems more like a bug to me (or maybe something in permissions I haven't noticed - but I've checked...) Any way, according to the documentation, it will detect whether ~/mail/ is mbox or maildir - but would that enable having both mbox and maildir in that directory? The goal is, to deploy Dovecot 1.0 at some time, while here there are users who have both maildir and mbox mailboxes (I.E. spool is mbox, ~/mbox is mbox, ~/mail contains some mbox mailboxes for small stuff that users want to be able to access even using /usr/bin/mail, and some larger maildir mailboxes (less critical, or high volume - e.g. mailing lists). How is that possible? Thanks, -- Tom P.S. Thanks again, Timo and rest of developers for this big piece of code - I maintain Dovecot 0.99 in another place and it's by far the most useful IMAP server yet. -- Tom Alsberg - hacker (being the best description fitting this space) Web page: http://www.cs.huji.ac.il/~alsbergt/ DISCLAIMER: The above message does not even necessarily represent what my fingers have typed on the keyboard, save anything further.

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