- dovecot - dovecot.org

[Dovecot] Inotify max_user_instances
by Daniel L. Miller 08 Mar '13

08 Mar '13

Maybe I have multiple problems - dunno. I've started seeing the following log lines: Mar 7 07:46:22 bubba dovecot: imap(dmiller(a)amfes.com): Warning: Inotify instance limit for user 5000 (UID vmail) exceeded, disabling. Increase /proc/sys/fs/inotify/max_user_instances max_user_instances is currently 128. I've tried stopping and restarting dovecot - the message immediately returns. I could just increase max_user_instances - but I'd like to understand what the number SHOULD be and why simply restarting Dovecot doesn't fix it. If this issue is for user "vmail" this is used by mail services only - and I've only got a few users on my system. I'm also fighting a netfilter issue - my connection tracking counters keep climbing. Don't know if this is in any way related. -- Daniel

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Re: [Dovecot] Changin password in LDAP
by Steffen Kaiser 07 Mar '13

07 Mar '13

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Wed, 20 Feb 2013, Arto Saraniva wrote: > We are using now dovecot 2.0.21 with open-ldap, but this situations has > already taken a quite long time. When user changes the password, we have > to reload dovecot every time, otherwise the change is ignored and > dovecot sees only the old password. Any ideas where the problem might > exist? does this help? http://wiki2.dovecot.org/Authentication/Caching?highlight=(auth_cache_ttl) - -- Steffen Kaiser -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iQEVAwUBUSTb2l3r2wJMiz2NAQLp3gf8DM2xCn03yWoVrCjbYNZeflBNRLbD67gE zqvrKUOqkyyDbUl1lgNcJOG39MI2eZpbDXzyWZ8nzzCnPKGOF2mNN76vPGmf6ZrR AQ0EaiJaYRoE14BQykQGvBSnoXgcyW0Ue4Z2RcmIS0iILfGN+VODDKc9PitC99Rc RJb6dQPft3FLM3oWca6BI1OkUuIF9EJcK3M4ROwr84s+OAs/6rkxIDgCCIdh5JZ5 svOkUxVE38zod+Det3yBuoWo5HOXYiE9Qi9jKn8xjQl8a06snXRuw1QktsyLKLjc 64T7KFa5IfXaVzOXCIWiiPiN7T0BVJzJ8G1YbHMzFqYkiPNa4NIO2Q== =NDhf -----END PGP SIGNATURE-----

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[Dovecot] Migrating from CourierMail to Dovecot
by Robert Moskowitz 07 Mar '13

07 Mar '13

My current mail server is a Fedora12 system running postfix/mysql/couriermail/squirrelmail mix. My new server is a Centos6 running postfix/mysql/postfixadmin/dovecot/roundcube mix. I have 4 virtual domains and about 20 users; not a big setup by any measure. Both servers have the same host name, but are currently on separate subnets. My current plan is to stop services on the old server, switch them on subnets, rename the old server, and let 'slow users' drain the old server over a couple of days. Then I got to thinking, could I migrate the /home/vmail/domain/user/new folders from the old to new server? Not too many rsync commands to run to pull it off, but would that work? Is there something dovecot needs to do, and not just drop the files into the .../new folder? Or is there some utility to run to properly place the mail files? The file names are similar. Courier file names look like: 1362661301.Vfd01I2422e6M121970.klovia.htt-consult.com,S=17381 Whereas dovecot adds a ",W=nnn" string to the file name. I am assuming the content is otherwise the same. I would like to test out the migration, and then pull it off over a sunday. Due to meetings and holidays, this won't happen until early April, so I have time to work out the details. All guidance and pointers are greatly appreciated.

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[Dovecot] Ask about IMAP UID
by Shiquan Wang 07 Mar '13

07 Mar '13

Hi all, I am new to dovecot. I am trying to use offlineimap + dovecot + gnus for some emails on multiple machines. I need to use org-mode capture links on emails. I want to know if the same email will have the same IMAP UID on different machines given that they are synced by offlineimap to a local maildir and served by dovecot respectively. Best, Shiquan -- 王时全 Shiquan Wang ************************************************************************************** National Laboratory of Pattern Recognition (NLPR) Institute of Automation, Chinese Academy of Sciences(CASIA) No.95 ZhongGuanCun East Road, HaiDian District, Beijing, China, 100190 Tel: +86-10-62653768 Fax: +86-10-62551993 Email: sqwang(a)nlpr.ia.ac.cn / shiquanwang(a)gmail.com Homepage: http://www.cbsr.ia.ac.cn/users/sqwang/ **************************************************************************************

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[Dovecot] Upgrading 1.2 to 2.x
by Simon Brereton 06 Mar '13

06 Mar '13

Hi I'm about to upgrade to 2.1.7 in my test environment, but "doveconf -n -c dovecot.1.conf > dovecot.2.conf" is producing a blank file, so I am unsure how to proceed. I know a lot has changed between them, so I don't really want to have to start from scratch unless I have to. I have tried both as my user and with sudo. Simon

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[Dovecot] failing ssl authentication
by Ivars Strazdiņš 06 Mar '13

06 Mar '13

Hi, I have a fairly basic dovecot 2.0.19 configuration on Ubuntu 12.04 LTS server with self signed certificates and "ssl = required" option set. It had been working for years flawlessly (including upgrade from 1.x to 2.0.19). Please see full "dovecot -n" output at the end of this post. Until recently, new mail user agents (MUA) are having problems. I cannot pass the account creation step, MUA says that there is some problem. I tried to isolate the problem and did some testing with various combinations of MUA and OS and I am still confused where is the problem - in dovecot, self signed certificates (in operation since 2003, expires this summer), or MUA, or operating system. All tests done with IMAP. For example, Recent Thunderbird versions (>10) do not work at all on most OS'es (tried Windows, Linux, OS X). Actually, v10 does not let me setup an account, but there is a way to get through by clicking on Advanced button. Then the account in Thunderbird is created. After that all works fine and Thunderbird can even be upgraded to the latest version. Windows Live Mail 2012 (former Outlook Express) works on Windows XP and Windows 7, but fails on Windows 8. dovecot.log gets this: 2013-03-06 22:44:38 imap-login: Info: Disconnected (no auth attempts): rip=x.x.x.x, lip=y.y.y.y, TLS handshaking: Disconnected Outlook 2013 does not work in either Windows 7 or Windows 8. Dovecot log for Outlook 2013 looks good, but Outlook complains. 2013-03-06 18:38:22 imap-login: Info: Login: user=<ivarss>, method=PLAIN, rip=x.x.x.x lip=y.y.y.y, mpid=16801, TLS I enabled verbose_ssl = yes in dovecot configuration, and all failing attempts produce this type of log 2013-03-06 22:34:10 imap-login: Warning: SSL failed: where=0x2002: SSLv3 read client certificate A [x.x.x.x] What does this mean - a problem with certificate on the client side, MUA, that is? How could this be cured then? Thanks for your time and patience! Ivars doveconf -n output: # 2.0.19: /etc/dovecot/dovecot.conf # OS: Linux 3.2.0-37-virtual x86_64 Ubuntu 12.04.2 LTS auth_mechanisms = plain login auth_socket_path = /var/run/dovecot/auth-master auth_verbose = yes default_process_limit = 300 info_log_path = /var/log/dovecot-info.log lda_mailbox_autocreate = yes lda_mailbox_autosubscribe = yes log_path = /var/log/dovecot.log log_timestamp = "%Y-%m-%d %H:%M:%S " mail_fsync = never mail_location = maildir:~/Maildir:INBOX=~/Maildir:LAYOUT=fs mail_privileged_group = mail maildir_very_dirty_syncs = yes managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date ihave passdb { driver = pam } plugin { antispam_backend = mailtrain antispam_mail_notspam = --ham antispam_mail_sendmail = /usr/local/sbin/antispam.sh antispam_mail_sendmail_args = -f;%u(a)edited.domain antispam_mail_spam = --spam antispam_spam = junk antispam_trash = Trash autocreate = junk autocreate2 = Sent autocreate3 = Drafts autocreate4 = Trash autosubscribe = junk autosubscribe2 = Sent autosubscribe3 = Drafts autosubscribe4 = Trash fts = squat fts_squat = partial=4 full=10 mail_log_events = delete undelete expunge copy mailbox_delete mailbox_rename flag_change append mail_log_fields = from, subject, flags, uid, box, msgid, size sieve = ~/roundcube.sieve sieve_dir = ~/sieve } postmaster_address = postmaster protocols = " imap sieve pop3" service auth-worker { client_limit = 0 } service auth { unix_listener /var/spool/postfix/private/dovecot-auth { group = postfix mode = 0660 user = postfix } unix_listener auth-master { group = musers mode = 0660 user = root } user = root } service imap { process_limit = 1024 } service pop3 { process_limit = 1024 } ssl = required ssl_cert = </etc/ssl/private/server.crt ssl_key = </etc/ssl/private/server.key userdb { driver = passwd } valid_chroot_dirs = /var/mail:/home protocol lda { mail_fsync = optimized mail_plugins = " sieve" } protocol imap { imap_client_workarounds = tb-lsub-flags delay-newmail tb-extra-mailbox-sep mail_max_userip_connections = 20 mail_plugins = " autocreate fts fts_squat antispam" } protocol pop3 { mail_plugins = " fts fts_squat" pop3_client_workarounds = outlook-no-nuls oe-ns-eoh } protocol lmtp { mail_fsync = optimized mail_plugins = " sieve" } protocol sieve { managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date }

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[Dovecot] Broken physical size caching in Dovecot 2.1.10
by Rob Redpath 06 Mar '13

06 Mar '13

Hi, I'm encountering two, probably related, errors in my Dovecot 2.1.10 install. The issue relates to compressed email stored in Maildir format directories. In some cases, a mailbox will become inaccessible, and the following will be logged from a doveadm fetch:- doveadm(info(a)example.com): Error: Corrupted index cache file /var/spool/virtual_mail/info_example.com_d/dovecot.index.cache: Broken physical size for mail UID 2777 doveadm(info(a)example.com): Error: Cached message size smaller than expected (18996 < 64624) doveadm(info(a)example.com): Error: Maildir filename has wrong S value, renamed the file from /var/spool/virtual_mail/info_example.com_d/cur/1277451630.H877760P14612.mailserver.example.com,S=18996:2,Z to /var/spool/virtual_mail/info_example.com_d/cur/1277451630.H877760P14612.mailserver.example.com,S=18996:2,Z Interestingly, the file mentioned in the error ( /var/spool/virtual_mail/info_example.com_d/dovecot.index.cache ) doesn't exist. The uncompressed size of the file is 64624 bytes, the compressed size is 18996. My attempts to debug the issue myself didn't get very far - the function that appears to return the wrong value is in /src/lib-storage/index/maildir/maildir-mail.c in the 2.1.13 source; it's do_fix_size() and appears to not consider whether a file is compressed or not when reporting it's size for S= value purposes. Can anyone help? I'm happy to provide parts of dovecot -n output if required, but I'd rather not post configuration in a public forum if it's not required. -- Rob Redpath Systems Administrator Heart Internet Ltd E: rob.redpath(a)heartinternet.co.uk DDI: 0115 845 6643 www.heartinternet.co.uk<http://www.heartinternet.co.uk> ****************************************************************** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you are not the intended recipient you are not authorised to and must not disclose, copy, distribute, or retain this message or any part of it. Heart Internet Ltd accepts no responsibility for information, errors or omissions in this email. ******************************************************************

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[Dovecot] question regarding rw-access on mailbox on creation/login (dovecot 1.2.17)
by Götz Reinicke - IT Koordinator 06 Mar '13

06 Mar '13

Hi, currently I have one new user with a problem. When she logs in to dovecot with pop3 from her apple mail, dovecot tells problems with the +w permission. Error: open(/var/mail/******) failed: Permission denied (euid=3462(******) egid=548(dozenten) missing +w perm: /var/mail) /var/mail is rw by root.mail I cant see why just this particular user has that problem/gets that messages. AFAIK no one changed any default permissions on directories or set different users. What could be "wrong"? Any suggestions is welcome. Regards . Götz -- Götz Reinicke IT-Koordinator Tel. +49 7141 969 82 420 Fax +49 7141 969 55 420 E-Mail goetz.reinicke(a)filmakademie.de Filmakademie Baden-Württemberg GmbH Akademiehof 10 71638 Ludwigsburg www.filmakademie.de Eintragung Amtsgericht Stuttgart HRB 205016 Vorsitzender des Aufsichtsrats: Jürgen Walter MdL Staatssekretär im Ministerium für Wissenschaft, Forschung und Kunst Baden-Württemberg Geschäftsführer: Prof. Thomas Schadt

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[Dovecot] Suggestions for upgrading dovecot 1.0.7 Redhat EL 5.x
by Götz Reinicke - IT Koordinator 06 Mar '13

06 Mar '13

Hi, we still have our solid rock dovecot 1.0.7 Redhat el 5.x up and running. We don't need much magic or special setups. However we'd like to think what might be the next step in upgrading our setup. Each user one mbox mailbox. About 500 imap/pop3 accounts, 400GB data. First of all: to what version is a good step from 1.0? Can we get a rpm from e.g. atrpms repository? Dose anyone has any experiences in doing such a "big" step forward? Or should we think of migrating to a total updated Redhat EL 6.x / Dovecot 2.0.x system? Any suggestions and comments are welcome. Regards . G. Reinicke -- Götz Reinicke IT-Koordinator Tel. +49 7141 969 82 420 Fax +49 7141 969 55 420 E-Mail goetz.reinicke(a)filmakademie.de Filmakademie Baden-Württemberg GmbH Akademiehof 10 71638 Ludwigsburg www.filmakademie.de Eintragung Amtsgericht Stuttgart HRB 205016 Vorsitzender des Aufsichtsrats: Jürgen Walter MdL Staatssekretär im Ministerium für Wissenschaft, Forschung und Kunst Baden-Württemberg Geschäftsführer: Prof. Thomas Schadt

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[Dovecot] Corrupted squat uidlist file
by Roger Lynn 06 Mar '13

06 Mar '13

Hi, I frequently get errors similar to this logged: Mar 5 17:49:20 alphonse dovecot: imap(roger): Error: Corrupted squat uidlist file /home/roger/Maildir/.Debian/dovecot.index.search.uids: wrong indexid I am running the Debian package version 1:2.1.7-7 on an up to date Debian Testing system with ext4 filing systems. 'doveadm index -A "*"' is run six nights a week and 'doveadm fts rescan -A' on the seventh night. The output of 'doveconf -n' should be attached. Is this something to be worried about? Am I doing something wrong? Thanks, Roger

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