- dovecot - dovecot.org

[Dovecot] Maildir configuration vs ZFS and snapshots...
by Peter Eriksson 04 Jul '07

04 Jul '07

I have a little tricky issue around here. First some background: Every user is assigned their own ZFS filesystem, and it's mounted as /home/USER with a Maildir inside it. The there is a filesystem snapshot (read-only) taken automatically every day by the system. The idea is to allow users easy access to backup copies of their mail so that they can restore things themself.. For example this structure (somewhat abbreviated, some files/dirs removed): /home/testson/ .zfs/ snapshot/ 2007-06-18/ Maildir/ cur/ new/ tmp/ .Trash/ cur/ new/ tmp/ Maildir/ cur/ new/ tmp/ .Trash/ cur/ new/ tmp/ Now,I can access the normal Maildir INBOX and folders nicely via Dovecot/IMAP. The thing is I'd like to be able to access the snapshot too via Dovecot/IMAP somehow. My first idea was to use Dovecots namespace feature like this in the config file: namespace private { separator = / prefix = snapshot/ location = maildir:~/.zfs/snapshot/2007-06-18/Maildir:CONTROL=~/.dovecot/control:INDEX=~/.dovecot/index } This works great for the mail folders inside the Maildir - but not for the INBOX which isn't displayed at all... (Ie, under the "snapshot" prefix I only see "Trash" etc when looking at the folder from an IMAP client). I think that I'd need to use the "INBOX=" option for Dovecot to see the top-level "new/cur/tmp" directories in the snapshot folder, but you can only have one INBOX if I'm not mistaken? Any suggestions on how best to configure this? - Peter

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[Dovecot] multiple userdb/passdb
by Thomas Balsfulland 04 Jul '07

04 Jul '07

hi all, i am using debian etch with dovecot imap (version 1.0.rc15-2) and mysql-database for the virtual mailuser. all informations (username, password, mailbox format, mailbox location, quota) are find in the sql. the maildir are locates at /home/vmail/, every is working fine. now i want to use imap for the system user as well - at the moment they cant user imap because they are not find in the sql db. so i set a second userdb/passwd in the dovecot.conf for the local system-user. now the config says: auth default { passdb passwd-file { args = /etc/dovecot/localuser } passdb sql { args = /etc/dovecot/dovecot-sql.conf } userdb passwd-file { args = /etc/dovecot/localuser } userdb sql { args = /etc/dovecot/dovecot-sql.conf } } and /etc/dovecot/localuser looks: localuser1:password:1000:1000::/home/localuser1::userdb_mail=mbox:~/Mail:INBOX=~/Mail/incoming now the local user is able to authenticate, but cant acces his mailboxes the logfile says: host dovecot: imap-login: Login: user=<localuser1>,method=PLAIN, rip=195.xxx.xxx.xxx, lip=193.yyy.yyy.yyy, TLS host dovecot: IMAP(tbals): lstat(/home/vmail//localuser1/cur) failed: Permission denied host dovecot: IMAP(tbals): lstat(/home/vmail/shared) failed: Permission denied it seems dovevot ignore the settings in /etc/dovecot/localuser. could someone help? regards thomas -- thomas balsfulland tbals(a)ctrl-c.de zwischen mut und dummheit liegt nur ein grat der sich durch das vorbereitetsein unterscheidet

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[Dovecot] OT - Claws Mail on Mac OS X
by Gerard 04 Jul '07

04 Jul '07

Someone on this list recently asked regarding the availability of Claws Mail on Mac OS X architecture, A BETA release has just been issued. http://damien.krotkine.com/claws/ -- Gerard

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[Dovecot] convert plugin: endless conversion and duplicate messages
by Andrew Ziem 03 Jul '07

03 Jul '07

Hi, When an mbox has a filename with a period, the Dovecot 1.0.1 convert plugin will endlessly convert the same mbox causing duplicate messages. To reproduce, create try converting two mboxes: one with a valid name and another with an invalid name. Then, repeat the login procedure a few times. Dovecot should do something more graceful such as replacing periods with another character. Here's /var/log/mail/errors Jul 2 08:29:44 aslan dovecot: IMAP(crystalp): Mailbox conversion: Couldn't create mailbox Print Shop Misc.: Invalid mailbox name Jul 2 08:39:46 aslan dovecot: IMAP(crystalp): Mailbox conversion: Couldn't create mailbox Print Shop Misc.: Invalid mailbox name Jul 2 08:48:54 aslan dovecot: IMAP(crystalp): Mailbox conversion: Couldn't create mailbox Print Shop Misc.: Invalid mailbox name Jul 2 08:48:58 aslan dovecot: IMAP(crystalp): Mailbox conversion: Couldn't create mailbox Print Shop Misc.: Invalid mailbox name Jul 2 08:49:39 aslan dovecot: IMAP(crystalp): Mailbox conversion: Couldn't create mailbox Print Shop Misc.: Invalid mailbox name Jul 2 08:59:40 aslan dovecot: IMAP(crystalp): Mailbox conversion: Couldn't create mailbox Print Shop Misc.: Invalid mailbox name Jul 2 09:09:40 aslan dovecot: IMAP(crystalp): Mailbox conversion: Couldn't create mailbox Print Shop Misc.: Invalid mailbox name Jul 2 09:20:23 aslan dovecot: IMAP(crystalp): Mailbox conversion: Couldn't create mailbox Print Shop Misc.: Invalid mailbox name I didn't test other non-{alphanumeric,whitespace} characters. Other than this and my previous e-mails, our conversion from UW-IMAP mboxes went nicely. I notice the performance difference, and our users will be happy to finally have proper subfolders. Andrew

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[Dovecot] listen parm questions
by Stewart Dean 03 Jul '07

03 Jul '07

Q1: My imap server has 4 interfaces, but only one is used for imap traffic. Can I do this: listen = 10.20.30.40:10143 (when imap.mycollege.edu is 10.20.30.40) Or is there even any benefit to doing this? Q2: Can I specify more than one port....during test eval, I've had the IT dept using port 1043 for listen....which I will, of course, change to 143 when DC goes production. So my department isn't cut off by that switchover, can I do this? listen = *:10143,143 or this listen = 10.20.30.40:10143,143 I did look at the wiki but didn't see anything -- ==== Stewart Dean, Unix System Admin, Henderson Computer Resources Center of Bard College, Annandale-on-Hudson, New York 12504 sdean(a)bard.edu voice: 845-758-7475, fax: 845-758-7035

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[Dovecot] [Fwd: Bounce action notification]
by Timo Sirainen 03 Jul '07

03 Jul '07

Anyone have ideas why this happened? Nothing special in logs, all tss(a)iki.fi deliveries went OK. Mailman's bounce log is unhelpful. Why does it say it tried to deliver to dovecot(a)dovecot.org and when it failed it disabled my account? Why doesn't it even bother saying which remote host gave an error? Grepping mail.log for 'This user' shows nothing.

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[Dovecot] dovecot + winbind problem
by Gregorics Tamás 03 Jul '07

03 Jul '07

Hi! I'm having some problem with our setup. I have a linux server authenticating from a win2k3 domain controller via winbind and pam. When i try to log in I receive the following error messages: Jul 3 10:26:10 zeusz pam_winbind[20375]: user 'tamas' granted access Jul 3 10:26:10 zeusz pam_winbind[20375]: user 'tamas' OK Jul 3 10:26:10 zeusz pam_winbind[20375]: user 'tamas' granted access Jul 3 10:26:10 zeusz dovecot: auth(default): userdb(tamas,127.0.0.1): user not found from userdb Jul 3 10:26:10 zeusz dovecot: imap-login: Internal login failure: user=<tamas>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, secured But when i try other services which also use winbind via pam (like popa3d) i can log in without any problem. Any ideas?

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[Dovecot] NameSpases
by Sergey A. Kobzar 03 Jul '07

03 Jul '07

Hi guys, I have a problem with namespases in Dovecot: namespace public { separator = / prefix = Public/ location = maildir:/home/mail/public } namespace private { separator = / prefix = inbox = yes } namespace private works well, but I can't subscribe to namespace Public in Outlooks Express, The Bat! and Mozilla Thunderbird. Outlook shows error 'Mailbox doesn't exist: Public'. Same with The Bat!. maildir:/home/mail/public exists and has correct rights: # ls -alh /home/mail/public/ total 0 drwx------ 5 mail mail 184 Jul 2 21:55 . drwxr-x--- 4 mail root 104 Jul 2 21:01 .. drwx------ 2 mail mail 48 Jul 2 21:01 cur -rw-r--r-- 1 mail mail 0 Jul 2 21:54 dovecot-shared drwx------ 2 mail mail 48 Jul 2 21:01 new -rw-r--r-- 1 mail mail 0 Jul 2 21:55 subscriptions drwx------ 2 mail mail 48 Jul 2 21:01 tmp # dovecot --version 1.0.1 # uname -rsm Linux 2.6.20-gentoo-r8 i686 Any help appreciated :) -- Sergey

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[Dovecot] Leaky dovecot-auth ?
by Christian Balzer 03 Jul '07

03 Jul '07

Hello, as mentioned before, we are migrating our mailboxes from a 0.99 cluster to a 1.0.0 one. With 0.99 dovecot-auth (with LDAP as backend) was leaking quite happily and the dovecot-auth processes frequently did hit their size limit and thus were killed and restarted. Which in 0.99 at least lead to authentication failures on a busy server, as the dovecot master process just killed off the auth process w/o disabling new connections to it first and letting any current authentications finish. The activity per cluster node on the 0.99 boxes was about 700k logins (mostly pop3) per day and 5 dovecot-auth processes with a 64MB limit each. The migrated users so far are of the less active kind and on one node of the 1.0.0 cluster we see about 70k logins/day and currently the dovecot-auth process there is hovering at 123/84MB (VIRT/RES in top). It was at 121/82MB when I checked 4 hours ago and no new users have been added to that node for 2 days. Authentication backend is still LDAP, no caching, 256MB process size limit. There are just 16k users on that node at this point in time, with only 1200 distinct users generating those 70k logins/day. We will start migrating the rest of the users tomorrow and now I'm wondering: 1. How and why would the memory footprint of dovecot-auth grow when there is no change in the amount of users in the DB? 2. What will happen when the single dovecot-auth process reaches 256MB in the end? Internal housekeeping attempts of that process? A whack to the head from the master process like in 0.99 and thus more erroneous authentication failures, potentially aggravated by the fact that there is just single dovecot-auth process? I guess at the current rate of leakage we shall know the answers to #2 soon one way or another. ;) Regards, Christan -- Christian Balzer Network/Systems Engineer NOC chibi(a)gol.com Global OnLine Japan/Fusion Network Services http://www.gol.com/

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[Dovecot] Semi-static userdb...?
by John Robinson 03 Jul '07

03 Jul '07

I'm trying to add "virtual" mailboxes to a system. Real users with different uids own domains. Each domain has a passwd-file passdb. I don't want to use this passwd-file for the userdb, because I want to fix the home, mail and uid/gid settings. Can I use the static userdb in a less static manner, e.g. userdb static { args = uid=%{owner of /vmail/%d} gid=%{gid of /vmail/%d} home=/vmail/%d/users/%u mail=mbox:/vmail/%d/users/%u/mail:INBOX=/vmail/%d/users/%u/INBOX } Or is it just a bad idea to let relatively untrusted domain owners manage their own passwd-file at all...? Cheers, John.

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