October 2010 - dovecot

[Dovecot] imap can't reconnect to auth-master after setuid
by Mike Abbott 27 Oct '10

27 Oct '10

With service imap { client_limit = 5, service_count = 0 }, when the auth process crashes the existing imap processes cannot reconnect to the auth-master socket because they have long ago dropped root privileges. Is the right solution to this: (1) change the perms on the auth-master socket so processes running as vmail:vmail can connect to it, or (2) change the code so that multi-client imap processes stop accepting new clients when they notice an auth bounce? If (1), the wiki should be updated to mention this. Thanks.

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[Dovecot] auth crash in 2.0.3
by Mike Abbott 27 Oct '10

27 Oct '10

Here's another one-off crash in dovecot-2.0.3's auth process. Looks like request->mech == NULL in auth_request_initial(). I don't see any obvious fixes to this code between 2.0.3 and 2.0.6 so it may still be present in 2.0.6. Exception Type: EXC_BAD_ACCESS (SIGSEGV) Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000018 0 auth 0x000000010d89381b auth_request_initial + 85 1 auth 0x000000010d891844 auth_penalty_anvil_callback + 207 2 libdovecot.0.dylib 0x000000010d8ea44f anvil_client_connect + 364 3 libdovecot.0.dylib 0x000000010d8f77e9 io_loop_handler_run + 234 4 libdovecot.0.dylib 0x000000010d8f82bb io_loop_run + 56 5 libdovecot.0.dylib 0x000000010d8edf98 master_service_run + 27 6 auth 0x000000010d89b18a main + 674 7 auth 0x000000010d88ec14 start + 52 There were several "Timeout waiting for handshake from auth server" errors from imap-login and pop3-login in the minutes before this crash.

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Re: [Dovecot] dovecot Digest, Vol 90, Issue 102
by Alan Brown 27 Oct '10

27 Oct '10

> From: "Roderick A. Anderson" <raanders(a)cyber-office.net> > Subject: [Dovecot] RHEL5/CentOS5 YUM repo, rpm, or spec file for 2.0? > > I don't remember sing any mention come across the list reference the > Subject line and nothing shows up within the first three pages of a > Google search. > > Anyone know of a YUM repo. RPM or spec file for Dovecot 2.0 and friends? Try the following 2 URLs: http://www.city-fan.org/ftp/contrib/yum-repo/ http://www.city-fan.org/ftp/contrib/mail/ ATrpms has builds too, but they're usually out of date.

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[Dovecot] blackberry emails
by dhottinger＠harrisonburg.k12.va.us 27 Oct '10

27 Oct '10

Does anyone have clients using blackberrys to access their emails on a dovecot server? If so are there any gotcha's that I need to configure in dovecot for this to work? Looks like all emails go to and from a blackberry server before getting to clients. thanks, ddh -- Dwayne Hottinger Network Administrator Harrisonburg City Public Schools "Everything should be made as simple as possible, but not simpler." -- Albert Einstein "The hottest places in Hell are reserved for those who, in times of moral crisis, preserved their neutrality." -- Dante

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[Dovecot] Corrupted transaction log file
by Andre Nathan 27 Oct '10

27 Oct '10

Hello I run dovecot 2.0.6 on a two-machine cluster using OCFS2 as the file system. I have some error messages like these in my log: Oct 25 01:07:50 box5 dovecot: lmtp(8886, suporte=100br.com(a)lmtp1.prv.f1.k8.com.br) Error: Corrupted transaction log file /var/lib/imap/user/a3/suporte=100br.com/stor age/dovecot.map.index.log seq 29: Transaction log corrupted unexpectedly at 21536: Invalid size 0 (type=0) (sync_offset=21908) Oct 25 01:07:50 box5 dovecot: lmtp(8886, suporte=100br.com(a)lmtp1.prv.f1.k8.com.br) Error: Index /var/lib/imap/user/a3/suporte=100br.com/storage/dovecot.map.index: Lost log for seq=29 offset=21796 Oct 25 01:07:55 box5 dovecot: lmtp(8885, suporte=100br.com(a)lmtp1.prv.f1.k8.com.br) Error: Log synchronization error at seq=30,offset=312 for /var/lib/imap/user/a3/su porte=100br.com/storage/dovecot.map.index: Append with UID 5404, but next_uid = 5405 Oct 25 02:37:53 box5 dovecot: lmtp(8885, suporte=hostnet.com.br(a)lmtp1.prv.f1.k8.com.br) Error: Log synchronization error at seq=47,offset=22944 for /var/lib/imap/user/03/suporte=hostnet.com.br/storage/dovecot.map.index: Extension record update for invalid uid=21815 These two accounts happen to be accessed simultaneously by a number of people, but there are similar errors for "normal" accounts too, just not the same amount of logs. Is it not considered safe to do this kind of simultaneous access in a distributed filesystem like OCFS2? Is there a way to fix this error? Would a "doveadm force-resync" do it? Thanks, Andre

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[Dovecot] lmtp proxy signal 11 in dovecot 2.0.6
by Oliver Eales 27 Oct '10

27 Oct '10

Hello, i am using the lmtp proxy and dovecot 2.0.6 When (in my case caused by an erroneous config in the backend lmtp server), the backend lmtp cannot find the user, the proxy dies with a signal 11. 220 backend Dovecot LMTP ready LHLO proxy MAIL FROM:<user@domain> 250-backend 250-8BITMIME 250-ENHANCEDSTATUSCODES 250 PIPELINING 250 2.1.0 OK RCPT TO:<user> 550 5.1.1 <user> User doesn't exist: user ..signal 11 within the LMTP proxy. Trace from lmtp proxy: #0 0x00007f7a979f24d3 in i_stream_next_line () from /usr/lib64/dovecot/libdovecot.so.0 No symbol table info available. #1 0x00007f7a979f25b8 in i_stream_read_next_line () from /usr/lib64/dovecot/libdovecot.so.0 No symbol table info available. #2 0x00007f7a97c3125c in lmtp_client_input () from /usr/lib64/dovecot/libdovecot-lda.so.0 No symbol table info available. #3 0x00007f7a979f75db in io_loop_handler_run () from /usr/lib64/dovecot/libdovecot.so.0 No symbol table info available. #4 0x00007f7a979f66f8 in io_loop_run () from /usr/lib64/dovecot/libdovecot.so.0 No symbol table info available. #5 0x00007f7a979e4f53 in master_service_run () from /usr/lib64/dovecot/libdovecot.so.0 No symbol table info available. #6 0x00007f7a98330933 in main () from /usr/lib/dovecot/lmtp No symbol table info available. Regards, Oliver

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[Dovecot] Command died with signal 11: "/usr/libexec/dovecot/dovecot-lda"
by spamvoll＠googlemail.com 27 Oct '10

27 Oct '10

Hi.. after upating from 2.0.1 to 2.0.4 postfix often reports errors when deliveing mails to dovecot: "Undelivered Mail Returned to Sender" -> Command died with signal 11: "/usr/libexec/dovecot/dovecot-lda" anyone seens this before ?

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[Dovecot] stats plugin + UID command continuation
by Mike Abbott 27 Oct '10

27 Oct '10

When using the stats plugin for dovecot-2.0, UID commands that "continue" cause infinite recursion and crash. For example, "A22 UID FETCH 151 BODY[]" when the body is 3MB or so always crashes. For smaller messages, this command logs the duration twice. Here is a patch to fix it: --- stats-plugin.c.orig 2010-10-26 20:18:13.000000000 -0500 +++ stats-plugin.c 2010-10-26 20:19:10.000000000 -0500 @@ -197,6 +197,9 @@ commands = array_get_modifiable(&imap_commands, &count); for (i = 0; i < count; i++) { + if (strcasecmp(commands[i].name, "UID") == 0) + continue; + hash_table_insert(orig_cmds, (char *)commands[i].name, commands[i].func); commands[i].func = stats_command;

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[Dovecot] Smart boxes
by Marcelo Salhab Brogliato 27 Oct '10

27 Oct '10

Hi, I'm using dovecot as IMAP server. I access my mails trough Mail (Mac client), iPhone and webmail. In Mail I use a smartbox that shows all my unread messages, no matter where it is. I really want this feature at my iPhone, so I'm thinking about developing a plugin that will create the smart unread box and follow these rules: - Every new mail arrived, it will create a hard link to directory .smart.unread (in case of Maildir); - Every mark as unread, it will create a hard link; - Every mark as read, it will remove the hard link; - Every mail delete, it will remove all files with same inode. This way, a smartbox with all unread messages will be available into webmail, iPhone and every IMAP client. What do you think about it? Is there a simple way? If it is a cool feature, I'll develop it and post the plugin here. Regards, Marcelo

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[Dovecot] Dovecot's maildir format / is rm safe
by ian＠comtek.co.uk 26 Oct '10

26 Oct '10

Is it considered 'safe' to delete directly from a dovecot Maildir? I mean things of the form: rm Maildir/cur/1288062016.M581217P9422.alpha,S=1873,W=1900:2,S The wiki tells me 'If you wish to modify them in any way, create a new message instead and expunge the old one. ' but it doesn't mention deleted files. Specifically I'm wondering what happens with: dovecot.index dovecot.index.cache dovecot.index.log dovecot-uidlist Since (http://wiki.dovecot.org/IndexFiles) tells me these files index each message is there a chance of Dovecot breaking badly if it can't find them? Is it intelligent enough to automatically update the above files when it finds a missing message file? Would simply deleting the 4 files be appropriate? I have users with 4 gig mailboxes so I really wouldn't want to be deleting those files in a script every night if its a long winded process to regenerate them. Thanks in advance for any help, Ian

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