- dovecot - dovecot.org

[Dovecot] So, what about clustering and load balancing?
by Stefan Foerster 15 Feb '10

15 Feb '10

Hello world, so, with beta2 of Dovecot 2.0 being available, what is the preferred way to achieve load balancing and fault tolerance? As far as I can see it, there are basically two options: 1) Use a HA shared storage, export either a cluster filesystem or NFS, and have your dovecot servers mount that file system. Load balance these servers (Cisco ACE, ldirectord, ...) and there you go. Overall performance is limited by the speed of the shared storage and may further decrease due to locking issues, imperformant cluster filesystems and so on. 2) Set up every dovecot server with local storage and trigger a dsync after each change (pyinotfiy, incron, parse LMTP delivery logs, ...). Load balance these servers as before. Depending on the number of syncs that have to be done, mailbox replication may lag behind. The need to constantly spawn dsync processes may further decrease performance if you don't do it right (stickiness of established connections, replicating at most every xyz seconds). What are your opinions on that matter? Stefan P.S: I've set up option two in a test setup, though the incron/inotify part is still giving me a headache.

6 12

[Dovecot] POP3 with dovecot LDA and sieve
by Arthur Titeica 14 Feb '10

14 Feb '10

Hello. I'm using Postfix with Dovecot as IMAP, POP3 and LDA. With sieve rules I successfully move mails to specific mailboxes and this is great if accessing the account thru IMAP. However, when accessing thru POP3 I only get mails from Inbox. I wonder if it's possible to get real new mails, regardless of the folder they're in. Thanks for any thoughts. Arthur

3 3

[Dovecot] comprehensive info on search capabilities?
by Kārlis Repsons 14 Feb '10

14 Feb '10

People, where to read about how to make the most of the current Dovecot search capabilities, including squat and possibly also the related future plans? There are many aspects like IMAP protocol itself, extensions, current support into Dovecot, support among MUAs... Could you post some good links, please?

2 3

[Dovecot] Virtual plugin and user_query
by Arthur Titeica 14 Feb '10

14 Feb '10

Hello, As per a previous reply regarding POP3 I'm now trying to configure the virtual plugin. However I don't really understand how to modify the sql user_query to properly indicate inbox=yes. I created 3 namespaces as per wiki instructions and I've modified the password and user queries as bellow: password_query = \ SELECT email, password, login , concat('*:bytes=', quota) \ AS userdb_quota_rule, \ CASE '%s' WHEN 'pop3' THEN NULL ELSE 'yes' \ END AS namespace_1_inbox, \ CASE '%s' WHEN 'pop3' THEN 'yes' ELSE NULL \ END AS namespace_2_inbox \ FROM users \ WHERE email = '%u' AND login = 'active' user_query = SELECT \ concat('*:bytes=', quota) AS quota_rule, \ CASE '%s' WHEN 'pop3' THEN NULL ELSE 'yes' \ END AS namespace_1_inbox, \ CASE '%s' WHEN 'pop3' THEN 'yes' ELSE NULL \ END AS namespace_2_inbox \ FROM users \ WHERE email = '%u' After that all I get in the logs is: IMAP(arthur(a)psw.ro): Error: namespace configuration error: inbox=yes namespace missing IMAP(arthur(a)psw.ro): Fatal: Namespace initialization failed As I don't really understand those case sql queries is there something I should add in the mysql tables? Any thoughts will be greatly appreciated. Thanks!

2 1

[Dovecot] deliver and cloning file permissions
by Alexander 'Leo' Bergolth 14 Feb '10

14 Feb '10

Hi! I'd like to use deliver (dovecot-1.2.10) as LDA to deliver mails to my local users on my postfix-system. However, deliver tries to copy the filesystem permissions of the mail-spool-files to the user's index files, which doesn't work, since the files in /var/mail/ belong to the group 'mail'. Feb 13 00:21:19 leo-x61 dovecot: deliver(leo): fchown(/home/leo/mail/.imap/INBOX/dovecot.index.log.newlock, -1, 12(mail)) failed: Operation not permitted (egid=100(users), group based on /var/mail/leo) I know that dovecot tries to clone the mailbox permissions in order to support shared folders but it would be nice if there was an option to disable this (or to just try it and ignore the fchown error). I could manually change group ownership of all mailboxes from mail to each user's primary group or set the mailbox-modes to 0600 but I'd also have to do that for every new user. (Tools to create users like useradd from shadow-utils use hardcoded file modes and group ownership.) Is there any workaround? Thanks, --leo -- e-mail ::: Leo.Bergolth (at) wu.ac.at fax ::: +43-1-31336-906050 location ::: IT-Services | Vienna University of Economics | Austria

3 5

[Dovecot] Plugin question
by Valery Gorbunov 14 Feb '10

14 Feb '10

Hi All I needs to write plugin which converting messages by replacing entier message by one of parts of this message. In another words I need show part of multipart message instead entire message. Stream substitution in *mail->v.get_stream()* function gives incorrect results because mail indexed and cached before. Therefore I should wrap email during indexing too. something like: ----- struct index_transaction_context * it; it->ibox->mail_vfuncs->get_stream = convert_get_stream; ----- Is it enough or idea to replace mail stream by another will don't work anyway? Could you suggest how to show one mail instead another in Dovecot environment? Thank you Valery Gorbunov

2 1

[Dovecot] Dovecot+Postfix+Maildir with ActiveDirectory userbase
by Luigi Rosa 13 Feb '10

13 Feb '10

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi, has anyone implemented a mail server with maildir, Postfix and Dovecot using Active Directory ad userbase and password authentication? Do I need Samba to authenticate users? Can I use credential caching just like mysql? Ciao, luigi - -- / +--[Luigi Rosa]-- \ This morning at breakfast, I noticed that Kellogg's have put a helpline number on their cornflake packets. When you need a helpline for breakfast cereals, it's time to start thinking about tearing down civilisation and giving the ants a go. --Chris King -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAkt2wGAACgkQ3kWu7Tfl6ZR3qQCgv7+smY1v1YY3OAK+A2lH/adr JtIAoIU+yd9zecP+iKoSxOAyaZJLnRfR =KnFa -----END PGP SIGNATURE-----

1 0

[Dovecot] scalability
by Jonathan Tripathy 13 Feb '10

13 Feb '10

Hi Folks, How scalable is dovecot. Do you think a machine with a dual core 2.8Ghz processor and 2GB of RAM would do a business with 600 users? This server will have a 100Mbps link to the net, however it will be access by the business using a couple of ADSL lines (Roughly 7Mbps each). This machine will also be running Postfix Your help is appreciated Cheers Jonny

3 2

[Dovecot] problem with deliver segfaulting
by Leonardo Rodrigues 13 Feb '10

13 Feb '10

i'm facing a pretty hard to debug problem when trying to use dovecot LDA (deliver) from postfix. After having all configured, mail deliver fails. This is from my maillog: Feb 12 21:27:54 correio postfix/pipe[12484]: 930F9F6105: to=<solutti(a)domain.com.br>, relay=dovecot, delay=0.21, delays=0.03/0.01/0/0.18, dsn=4.3.0, status=SOFTBOUNCE (Command died with signal 11: "/usr/libexec/dovecot/deliver") at the same time, i have from my /var/log/messages: Feb 12 21:27:54 correio kernel: deliver[12485]: segfault at 0 ip 4c1be763 sp bff64c28 error 4 in libc-2.5.so[4c193000+13f000] so, seems deliver segfaults. so i tried enabling mail_debug=yes on dovecot.conf for getting some debug ..... and, with mail_debug enabled, deliver WORKS !!!! Feb 12 21:28:41 correio postfix/pipe[12748]: 1A969F6105: to=<solutti(a)domain.com.br>, relay=dovecot, delay=0.28, delays=0.03/0.01/0/0.24, dsn=2.0.0, status=sent (delivered via dovecot service) disabling mail_debug makes the segfault happens again .... and reenabling mail_debug make it works again ! how can i debug this !?!?!? -- Atenciosamente / Sincerily, Leonardo Rodrigues Solutti Tecnologia http://www.solutti.com.br Minha armadilha de SPAM, NÃO mandem email gertrudes(a)solutti.com.br My SPAMTRAP, do not email it

2 5

[Dovecot] REPOST: mbox vs maildir
by Ashley M. Kirchner 12 Feb '10

12 Feb '10

Ignoring my previous message just for a second, I realized that my config wasn't correct. First the layout: ~mail/ ~mail/Drafts ~mail/Ashley-Feb09 ~mail/Others-Feb09 ~mail-Archives/ ~mail-Archives/2009/ ~mail-Archives/2009/Ashley/ ~mail-Archives/2009/Ashley/Ashley-Dec09 ~mail-Archives/2009/Ashley/Ashley-Nov09 ~mail-Archives/2009/Ashley/Ashley-Oct09 So I (now) have this for namespaces: namespace private { separator = / prefix = "mail/" location = mbox:~/mail:INBOX=/var/mail/%u inbox = yes hidden = no list = yes # for v1.1+ } namespace private { separator = / prefix = "mail-Archives/" location = maildir:~/mail-Archives:LAYOUT=fs inbox = no hidden = no list = yes subscriptions = yes } But when I'm in Thunderbird and I try to subscribe to anything that falls inside of ~/mail-Archives/ it won't work. I can browser all the way down to the folder, but I can't see anything within that folder. For example, consider the full path to the following 'Ashley-Dec09' mailbox: ~mail-Archives/2009/Ashley/Ashley-Dec09 In Thunderbird, when I hit 'Subscribe' I can browse down to '2009' and I can see 'Ashley', but I can't drill down into it and subscribe to 'Ashley-Jan09'. What am I missing here?

1 0