- dovecot - dovecot.org

[Dovecot] Need a quick, safe method to empty /home/user/Maildir/{.Junk, .Trash}
by Jeff Kowalczyk 13 Jun '08

13 Jun '08

I have some (Thunderbird client, dovecot-1.0.13, Maildir) users who get an appalling amount of spam-with-attachment, and it's causing backups to take an inordinate amount of time. I'll implement some quota and server-side spam management when I go to dovecot-1.1, but in the meantime: What is the safest way to empty all messages within, but not delete, the following folders from the server command line: /home/user/Maildir/.Junk /home/user/Maildir/.Trash I don't want the Thunderbird-2.0.14 client to report corrupt indexing, or worse not show the folder at next use. Thanks.

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[Dovecot] 1.1rc10: istream-crlf.c: assertion failed: (size != 0)
by Marco De Benedetto 13 Jun '08

13 Jun '08

Hi, I am migrating from 0.99.14 to 1.1.rc10 and from mbox to maildir. During the conversion, via convert plugin, I get this assertion failure: 2008-06-13 14:12:51 Error: IMAP(username): Next message unexpectedly lost from 4700 2008-06-13 14:12:51 Error: IMAP(username): Next message unexpectedly lost from 4700 2008-06-13 14:12:51 Panic: IMAP(username): file istream-crlf.c: line 49 (i_stream_crlf_read_common): assertion failed: (size != 0) 2008-06-13 14:12:51 Error: IMAP(username): Raw backtrace: imap [0x80d1c31] -> imap [0x80d1c9a] -> imap [0x80d159c] -> imap [0x80d6fa5] -> imap [0x80d6fc3] -> imap [0x80d81b9] -> imap(i_stream_read_data+0x39) [0x80d60f9] -> imap [0x80cadb3] -> imap [0x80cbdeb] -> imap(message_parser_parse_next_block+0x1d) [0x80cae5d] -> imap(index_mail_cache_parse_continue+0x22) [0x8096132] -> imap(maildir_save_continue+0x4b) [0x807a49b] -> imap(mail_storage_copy+0xdb) [0x80a07ab] -> imap(maildir_copy+0x5b) [0x8076ebb] -> /usr/lib/dovecot/modules/imap/lib20_convert_plugin.so(convert_storage+0x48c) [0xb7f279bc] -> /usr/lib/dovecot/modules/imap/lib20_convert_plugin.so [0xb7f2841d] -> imap(mail_namespaces_init+0x645) [0x80a1345] -> imap(main+0x3c1) [0x806ab51] -> /lib/libc.so.6(__libc_start_main+0xe0) [0xb7e02450] -> imap [0x805ca91] 2008-06-13 14:12:54 Error: IMAP(username): Mailbox conversion: Couldn't create mailbox directory Ospedale 2008-06-13 14:12:54 Fatal: IMAP(username): Mailbox conversion failed, exiting If it can be useful for debugging purpose, is there something I can do to identify the mailbox causing the failure? I am also investigating why the plugin tried to recreate directory for the already converted mailbox "Ospedale". -- Marco De Benedetto

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[Dovecot] 9GB of messages in /tmp
by Charles Marcus 13 Jun '08

13 Jun '08

Hello, Well, I have a brain-dead user (using Thunderbird 2.0.0.14) who just won't listen when I tell them not to try to move 5000+ messages at one time (or if deleting, bypass the Trash), and they managed to royally screw up their maildirs... I have two problems... 1. The /tmp directory has 9+GB in it... can I just rm tmp/* on that directory without making this problem worse? and 2. One of the directories they were moving now has 5 copies of a whole bunch of messages... I'm very dangerous when it comes to command-line work beyond really basic stuff, and my scripting skills are less than inspiring... Is there a relatively safe command-line way of finding all messages that have more than one instance, and deleting all but the last instance? Tia... -- Best regards, Charles

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[Dovecot] Dovecot 1.1rc9 strange messages
by Raphael Bittencourt S. Costa 13 Jun '08

13 Jun '08

Helo all, I'm working on a migration from qmail+courier+maildrop to postfix +dovecot1.1+lda and today the logs has too many strange messages like this: Jun 12 10:51:22 mailserver03 dovecot: IMAP(xxxxl(a)xxxx.com.br): Broken file /data/services/dominios/xx.com.br/m/ma/mapel//Maildir/.Sent/dovecot-uidlist line 29: UID larger than next_uid (535 >= 535) Jun 12 10:51:26 mailserver03 dovecot: POP3(xxxx(a)xxxxx.com.br): Broken file /data/services/dominios/bx.com.br/n/no/nordeste//Maildir/dovecot-uidlist line 2: UID larger than next_uid (12 >= 12) Should I worry about this? Why dovecot-uidlist is getting broken? []s, Raphael Costa

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[Dovecot] "Disable non webmail IMAP access" in vpopmail and Dovecot
by Alessio Cecchi 13 Jun '08

13 Jun '08

Hello, i'm using in my installation qmail+vpopmail and now I have migrated from courier-imap to dovecot. Dovecot is very much faster with large mailbox than courier-imap. But I have a problem. vpopmail has a feature that allows you to "Disable non webmail IMAP access", many webmail using imap as if they were, and they are, a client IMAP. vpopmail give me the ability to disabile IMAP, expect for 127.0.0.1, both for individual users than for single domain. So i can grant IMAP access, from remote client, only for some users but webmail access for all. Here you can read some of my messages in the vpopmail's list: http://www.mail-archive.com/vchkpw@inter7.com/msg25880.html But with dovecot this feature seems not to be compatible. A friend of the vpopmail's list sent me a patch for dovecot but I can not get it to work: >->->->->->->->->->->->->->->->->->->->->->->->->->-> Hi Alessio, i spent over 5 hours looking for a solution to this problem and i found one working for me in dovecot sources edit src/auth/passdb-vpopmail.c than add char *remotehost = net_ip2addr(&auth_request->remote_ip); auth_request_log_info(auth_request, "vpopmail", "remote ip is: %s", remotehost); before if (((vpw->pw_gid & NO_IMAP) != 0 && line than modify the condition line to look like: if (((vpw->pw_gid & NO_IMAP) != 0 && strcmp(auth_request->service, "IMAP") == 0 *&& strcmp(remotehost, "127.0.0.1") != 0*) || ((vpw->pw_gid & NO_POP) != 0 && strcmp(auth_request->service, "POP3") == 0)) { auth_request_log_info(auth_request, "vpopmail", "%s disabled", auth_request->service); password = NULL; *result_r = PASSDB_RESULT_USER_DISABLED; } else ............... this way you will preserve webmail access and cut imap from external in case -i limit is defined in vpopmail hope it helps <-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-< Can someone help me in making compatible this useful feature of vpopmail with dovecot? Thank you -- Alessio Cecchi is: @ ILS -> http://www.linux.it/~alessice/ Assistenza Sistemi GNU/Linux -> http://www.cecchi.biz/ @ PLUG -> ex-Presidente, adesso senatore a vita, http://www.prato.linux.it @ LOLUG -> neo-Socio http://www.lolug.net

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[Dovecot] configure error on HP-UX: C99 compatible vsnprintf() call
by Woonsan Ko 13 Jun '08

13 Jun '08

Hi All, I tried to build dovecot-1.1.rc9 on a HP-UX machine, but failed to configure with the following message: configure: error: You don't appear to have C99 compatible vsnprintf() call The environment is like the following: - command: ./configure - uname: HP-UX B.11.23 U ia64 - aCC version: HP aC++/ANSI C B3910B A.05.55 [Dec 04 2003] Also, I tried to run `./configure CC=c99' and `./configure CC="/opt/aCC/bin/aCC -Ae" also, but the result was the same. I'm not sure, but the HP C compiler does not seem to support C99 fully with vsnprintf() call. Is there any workaround for this problem? TIA, Woonsan

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[Dovecot] [Patch] Fix delay on imao-append
by Bruno Prémont 13 Jun '08

13 Jun '08

Dovecot version: 1.1-rc8, 1.1-rc9 System: Linux-2.6.2x User-Agent: claws-mail-3.3 and 3.4 When appending messages (e.g. copy from mailclient local folder or second server to dovecot imap folder) dovecot answers with: <tag> OK [APPENDUID <n> <m>] Append completed\r\n This answer often reaches the client as two or more TCP packets, the client (when not using TCP_NODELAY on its socket) ACKs with some delay. When copying lots of (small) messages this delay has a very negative impact on copy time even though there are lots of network and system resources available. Sample sniffer output on client host: ... 1 0.0000 claws dovecot IMAP Request: 14639 APPEND "Test" (\Seen) {853} 2 0.0033 dovecot claws IMAP Response: +OK 3 0.0034 claws dovecot IMAP Request: <message> 4 0.0096 dovecot claws IMAP Response: 14639 5 0.0467 claws dovecot TCP 33453 > imap [ACK] 6 0.0481 dovecot claws IMAP Response: OK [APPENDUID 1204729411 2] Append Completed. 7 0.0481 claws dovecot TCP 33453 > imap [ACK] ... The delay of about 35ms between packet 4 and its ACK in packet 5 causes copies from client to server to be extremely slow. (Client and server on same 100Mb LAN, same result if client and server are on same host) The attached patch makes dovecot send the whole answer in a single packet, thus not triggering the delay issue. As far as I found out the delay is generated by Naggle algorithm, this algorithm being used by Linux TCP stack for small packets with the aim of improving payload/overhead share. Bruno Prémont RESTENA Foundation

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[Dovecot] How many imap processes per user
by Martijn de Munnik 13 Jun '08

13 Jun '08

Hi, I'm using dovecot for the first time on a production server (before dovecot I used bincimapd). I have a question about the number of imap (not imap-login) processes created for a user. I've seen 100+ processes for just 1 user. So far it only occurs for 1 user, other users have just 1 imap process. I now the user is using thunderbird and 2 mailclients are logged in at the same time (one workstation and one laptop). Is there an issue with dovecot/thunderbird? info@dem 28596 15780 0 10:48:41 ? 0:02 imap info@dem 28933 15780 0 10:50:57 ? 0:01 imap info@dem 25627 15780 0 10:28:55 ? 0:00 imap info@dem 28938 28933 0 - ? 0:00 <defunct> info@dem 29472 15780 0 10:54:23 ? 0:00 imap info@dem 25628 25627 0 10:28:55 ? 0:00 rawlog /opt/csw/ libexec/dovecot/imap info@dem 29329 29327 0 - ? 0:00 <defunct> info@dem 29805 29801 0 - ? 0:00 <defunct> info@dem 24303 24300 0 10:20:46 ? 0:00 rawlog /opt/csw/ libexec/dovecot/imap info@dem 29941 15780 0 10:58:09 ? 0:00 imap info@dem 28480 28477 0 - ? 0:00 <defunct> info@dem 28329 15780 0 10:46:28 ? 0:03 imap info@dem 29177 29176 0 - ? 0:00 <defunct> info@dem 28749 28748 0 - ? 0:00 <defunct> info@dem 29801 15780 0 10:56:56 ? 0:00 imap info@dem 29180 29179 0 10:52:05 ? 0:00 rawlog /opt/csw/ libexec/dovecot/imap info@dem 29635 15780 0 10:55:35 ? 0:00 imap info@dem 29642 29635 0 - ? 0:00 <defunct> info@dem 28477 15780 1 10:47:37 ? 0:02 imap info@dem 28200 28199 0 - ? 0:00 <defunct> info@dem 29942 29941 0 10:58:09 ? 0:00 rawlog /opt/csw/ libexec/dovecot/imap info@dem 28597 28596 0 - ? 0:00 <defunct> info@dem 28330 28329 0 - ? 0:00 <defunct> info@dem 25610 25609 0 10:28:49 ? 0:00 rawlog /opt/csw/ libexec/dovecot/imap info@dem 28748 15780 0 10:49:48 ? 0:02 imap info@dem 25609 15780 0 10:28:49 ? 0:00 imap info@dem 29176 15780 0 10:52:05 ? 0:01 imap info@dem 29327 15780 0 10:53:12 ? 0:01 imap info@dem 29179 15780 1 10:52:05 ? 0:05 imap info@dem 28199 15780 0 10:45:22 ? 0:03 imap info@dem 29474 29472 0 - ? 0:00 <defunct> info@dem 24300 15780 0 10:20:46 ? 0:00 imap All those processes are really slowing down the server. Martijn

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[Dovecot] strange looking code and userdb errors
by Tony den Haan 13 Jun '08

13 Jun '08

hi, i'm trying to use passdb ldap and userdb prefetch, using the userdb_ prefixes in pass_attrs, and i get: passdb didn't return userdb entries looking at the code at auth/userdb-prefetch.c i see: if (auth_request->userdb_reply == NULL) { if (auth_request->auth->userdbs->next == NULL) { /* no other userdbs */ auth_request_log_error(auth_request, "prefetch", "passdb didn't return userdb entries"); } else { /* more userdbs, they may know the user */ auth_request_log_info(auth_request, "prefetch", "passdb didn't return userdb entries"); } callback(USERDB_RESULT_USER_UNKNOWN, auth_request); return; } is this really correct? if so it migth be a good idea to at least print different errors Tony

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[Dovecot] auth issues on centos5 with ldap backend
by Jurvis LaSalle 13 Jun '08

13 Jun '08

Hi, We've had some issues with auth. /var/log/secure is full of 1000s of these lines: Jun 4 19:12:08 khan dovecot-auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser= rhost=127.0.0.1 user=user123 Users can usually login OK with their ldap credentials, but occasionally logins slow to a crawl if not outright fail, esp people checking mail through Squirrelmail. Things get better after a dovecot restart. Googling around, I thought if we switched the order or disabled the second passdb we had configured for our dovecotadmin account, these failures would go away but that did not happen. Any thoughts or additional info I can provide? Pardon the unusual install prefix. We're trying to keep the source install separated from the ancient dovecot rpm shipped in rhel5. Thanks, Jurvis [root@khan ~]# /etc/dovecot/sbin/dovecot -n # 1.0.13: /etc/dovecot-1.0.13/etc/dovecot.conf log_path: /var/log/dovecot.log info_log_path: /var/log/dovecot-info.log ssl_cert_file: /etc/pki/dovecot/certs/star.idi.harvard.edu.crt ssl_key_file: /etc/pki/dovecot/private/star.idi.harvard.edu.key login_dir: /etc/dovecot-1.0.13/var/run/dovecot/login login_executable: /etc/dovecot/libexec/dovecot/imap-login mail_location: maildir:/RAID5/mailboxes/%u maildir_stat_dirs: yes maildir_copy_with_hardlinks: yes imap_client_workarounds: outlook-idle delay-newmail auth default: executable: /etc/dovecot/libexec/dovecot/dovecot-auth master_user_separator: * debug: yes debug_passwords: yes passdb: driver: pam args: blocking=yes userdb: driver: passwd args: blocking=yes

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