- dovecot - dovecot.org

[Dovecot] IMAP crashes with signal 10 (SIGBUS)
by Joseph Tam 11 Jan '05

11 Jan '05

I wrote: > Any idea on what's causing this? > > Description: > imap process crashed with SIGBUS. > > Versions: > OS: Solaris 8, 9 > Dovecot: 1.0-test57 > Gcc: 3.2 same with 3.4.3 > > Backtrace: > #0 mbox_file_seek (ibox=0x8d9b0, view=0x8dc38, seq=2, deleted_r=0xffbef40c) at mbox-file.c:119 > ... Subsequent versions still crashed and I looked into the problem further. Specifically it crashes at this line offset = *((const uint64_t *)data); when "data" assumes a non-64 bit aligned value. At first I thought that 64-bit ints should always be aligned on 64-bit boundaries, but when I isolated this code into a standalone executable to demonstrate it (no arguments to cause a crash, one argument is OK): int main (int argc, char *argv[]) { int a[]={1,2,3,4}; long long int i64; void *p=(void *) (&a[argc]);; printf("Pointer to 32-bit int = %x\n",p); i64 = *((long long int *)p); printf("Successful casting to 64-bit int: value=%016llx\n",i64); } I found out that the presence of any optimisation (-O, -O2, -O3) will cause this to crash, yet it will work if no optimisation is present even though a pointer being cast is still not aligned on a 64-bit boundary (but aligned on a 32-bit boundary). I check the gcc bug web page page came up with this reference which may explain this behaviour. http://gcc.gnu.org/bugs.html#known - see section "Casting does not work as expected when optimization is turned on" http://mail-index.netbsd.org/tech-kern/2003/08/11/0001.html They claim that this casting violates ISO aliasing rules and the results like crashing are to be expected. Maybe this statement ought to be rewritten memcpy(&offset,data,sizeof(uint64_t)); There is one other statement at mbox-synbc.c:319 (1.0-test59) that may need this consideration. Joseph Tam <tam(a)math.ubc.ca>

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[Dovecot] ldap auth (with user and domain a different places)
by Timo Boettcher 11 Jan '05

11 Jan '05

Hi, I am trying to use dovecot with my virtual-hosting setup. I have all users in LDAP like uid=user,dc=domain.tld,o=myorganization for the user with the mail-address user(a)domain.tld. This is also the username that user should use for login, but it is nowhere in the ldap-db in this form together, just user and domain at their own places. Is it possible to authenticate with dovecot against such an ldap-directory? After reading docs and comments in the config-file, I think no, but I am not sure. As I read the source, it is not possible just now, but would be, if I could use %d in the searchbase. Or did I understand something wrong? TIA Timo Boettcher

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[Dovecot] dovecot + vpopmail
by Chris L. Franklin 10 Jan '05

10 Jan '05

I was just wondering how dovecot interacts with vpopmail. Does it just call the vchkpw and pass the username and password to it then wait for a it to tell dovecot weather the user is vaild or not ? Does vchkpw pass back the users homedir ? PS. My plan is to just replace vchkpw with a script/program of own. that dovecot can call to auth a user again xmail passwd file. And using "auth_passdb = static uid=<uid> gid=<gid> home=<dir template> mail=<dir template>" to fill in all the holes. -- Chris L. Franklin --

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[Dovecot] imap catches sig 11 on EXPUNGE
by Thomas Lofgren 10 Jan '05

10 Jan '05

Debian unstable, x86 # dovecot --version 0.99.12 # tail /var/log/mail.log ... Jan 6 16:56:55 gecko dovecot: child 16505 (imap) killed with signal 11 ... When I use squirrelmail, the imap process always segfaults when I try to enter my INBOX group. Squirrelmail produces the following error message: ERROR : Connection dropped by imap-server. Query: EXPUNGE When I use gnus, I can enter the group just fine, but gnus/emacs hangs on exit (100% reproducible, as is the squirrelmail case). Turning on debug info I catch this in the imap log: 37 UID SEARCH UID 1098 NOT SINCE 30 DEC 2004 * SEARCH 37 OK Search completed. 38 EXPUNGE read:errno=0 (hangs until emacs is killed) So in each case, it seems to happen on EXPUNGE. I got it to produce a core file, and this is the backtrace: (gdb) where #0 0x08071a58 in mail_index_lookup_field_raw () #1 0x080666b6 in mbox_mail_get_location () #2 0x08063111 in mbox_is_valid_mask () #3 0x08063553 in mbox_expunge_locked () #4 0x0806a9c3 in index_storage_expunge () #5 0x08051cc6 in cmd_expunge () #6 0x08054ae9 in _client_reset_command () #7 0x08054b78 in _client_input () #8 0x0808b108 in io_loop_handler_run () #9 0x0808aa98 in io_loop_run () #10 0x0805ac29 in main () Please let me know if I can provide any further information. I don't subscribe to the mailing list, but I'll try to keep up on the archive in the next few days. Thanks, Tom

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[Dovecot] migration from bincIMAP
by RYAN vAN GINNEKEN 10 Jan '05

10 Jan '05

Hello all I am using Freebsd 4.10stable, postfix 2.1.5 with SASL and TLS, procmail version 3.22 and binc IMAP 1.2.8 binc uses IMAPdir style mail boxes, Spam assassin, and ClamAV. Wish to convert to dovecot but your program does not support IMAPdir does it??? also i have many user accounts that i wish to use untouched if possible. I guess this is a migration question for the most part i am switching to dovecot because of its ability to use postgre database files and real log file. Is there a simple way to achieve this without losing any of my users mail? -- COMPUTER KING for all your computer needs http://www.computerking.ca email luck(a)computerking.ca phone 403-613-LUCK (5825) Hosting, Networking, Disaster Recovery, and Virus Removal solutions fit for royalty. Intel based SYSTEMS Toshiba Fujutsu Sony Acer and many more LAPTOPS Full line of high quality PARTS Current Specials Samsung printers and HOSTING packages

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[Dovecot] Where are flags stored?
by Adam Pordzik 10 Jan '05

10 Jan '05

Hello, I don't now wheather this is IMAP or actually dovecot-specific, but I hope you people here knows about this at least: Where are flags like seen/unseen or e.g. message-priority stored? My goal is to mark spam or other filtered by procmail as "seen", so that dovecot doesn't notify MUAs about new mail in IDLE mode. Are there any mail-headers, so I can set these with procmail to accomplish that? Thanks for help, A

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[Dovecot] Repair/Cleaup Maildir
by Glen Eustace 10 Jan '05

10 Jan '05

After having fought an issue with Courier-imap on FC3 for a week (that is still unresolved), I decided to try Dovecot instead. So far, fingers crossed, the issue has not re-occured. Migrating from courier-imap/sqwebmail to Dovecot/Squirrelmail was reasonably painless but I now have an problem. Is there a utility available to cleanup/repair the maildir tree for each user ? As part of the migration, I copied all of the courierimapsubscribed files to .subscriptions and removed the leading 'INBOX'. This seemed to be enough to get things going. Unfortunately, people who had only ever used webmail didn't have a courierimapsubscribed file. When they next used squirrelmail, a new .subscriptions file was created but didn't contain their folders. I tried to fix this by recreating the subscriptions file for each user and adding in all the .directories in their maildir root. I now have a maildir hierarchy with lots of crud in it. I need a utility to go through and deleted all the files that shouldn't be there anymore and to ensure that the subscriptions files are correct. Does such a utility exist ? If not, can anyone tell me where I can find a good description of what Dovecot expects to find in maildirs so I can write one myself. Any suggestions/help appreciated. -- =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Glen and Rosanne Eustace, GodZone Internet Services, a division of AGRE Enterprises Ltd., P.O. Box 8020, Palmerston North, New Zealand 5301 Ph/Fax: +64 6 357 8168, Mob: +64 27 5 424 015, Web: www.godzone.net.nz "A Ministry specialising in providing low-cost professional Internet Services to NZ Christian Churches, Ministries and Organisations"

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[Dovecot] Extremely Slow Pop3 Downloads, Evolution 2.0.2
by Michael Joy 10 Jan '05

10 Jan '05

Hello All, We've been running Dovecot for imap for quite some time and have had little trouble with it. However, we recently switched over to using dovecot for pop3 because of simplicity as well as security issues with the older UW based pop server. I've noticed one serious problem. The only client that seems to have any issue at all with the server is Evolution. In pop3 mode, it takes a minute or more to download a few messages on an inbox with 400+ saved messages in it over gigabit ethernet. Over a DSL connection using MS Outlook 2k3 it takes about a minute total for all messages. Similarly with KMail it takes about 5-10 seconds to download all messages in the pop3 box. The messages trickle in with evolution 2.x, I've tried 2.0.0, 2.0.1, and 2.0.2 and all have this problem. I haven't tried the 1.x series as I don't have any linux boxes that old available to test. So apparently, there's two things of concern. 1. The server is definitely fast enough to handle the large mail box. 2. There's some serious incompatibility in Evolution/Dovecot causing for the 14.4 modem email download speeds over lan. We're running Dovecot 0.99.12 on Debian unstable, however 0.99.11 exhibited this behavior as well. If anyone has some hints, I'd greatly appreciate it. It's annoying having to wait 5-10 min to download mail in the morning when one gets into work ;) If there's any other information I can provide, please ask. Thanks to whichever kind soul finds time to trudge through this problem with us. Michael D. Joy HEP - University of Mississippi mdjoy(a)phy.olemiss.edu

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[Dovecot] dovecot adds "Status: O"
by Vegard Svanberg 10 Jan '05

10 Jan '05

Dovecot adds the "Status: O" header when users download their email. Why? -- Vegard Svanberg <vegard(a)svanberg.no> [*Takapa@IRC (EFnet)]

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[Dovecot] multiple domains howto
by Mesut Bayrak 10 Jan '05

10 Jan '05

i dont know howto host multiple domains with dovecot are there any way to make it ?

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