- dovecot - dovecot.org

[Dovecot] Recommended FS for Dovecot Maildir
by Daniel Watts 10 May '06

10 May '06

Hi, I've heard that for Dovecot/Mailir systems there are filesystems that are optimised for the situation of many small files in one folder. Could I possibly have some feedback on what the recommended filesystems are? I've heard of ReiserFS but was wondering what other options there are and how they compare. If I get a good comprehensive response I'll build a wiki summary page out of the data gathered. Best wishes, Daniel

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[Dovecot] Re: Recommended FS for Dovecot Maildir
by Roger Weeks 10 May '06

10 May '06

> Date: Wed, 10 May 2006 00:24:23 +0100 > From: Daniel Watts <d(a)nielwatts.com> > Subject: Re: [Dovecot] Recommended FS for Dovecot Maildir > To: Les Mikesell <lesmikesell(a)gmail.com> > > Can you remember any general findings? > > Thanks to all for responding in this thread - I am reading them all > and > making notes. All very useful information. > > Can I phrase the question in a different way? Of those of you who are > running 10,000+ user system - what FS do you use? > Or do you all use special file servers (netapps, emc etc?) with > proprietary filesystems? > > Daniel We're probably right at your 10000 user threshold, but we're an ISP so we get a LOT of mail traffic. Our mail system consists of dual exim servers processing incoming mail, writing to maildirs on a home- built NFS system. The home-built system is a dual-xeon machine with lots of SATA disks in a RAID5. We then have two client-facing machines running dovecot and squirrelmail. These are all SuperMicro servers running RedHat ES 4. They all use SATA disks. We are using EXT3 for the RAID5 filesystem, and I have had no performance issues to speak of. I had considered Reiser or xfs, but as I have limited experience with either filesystem I didn't feel comfortable using them in production. -- Roger J. Weeks Systems & Network Administrator Mendocino Community Network

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[Dovecot] Debugging with strace
by Fran Fabrizio 10 May '06

10 May '06

We have a dovecot install that is working fine for everyone except one user, who complains that it takes a minute or longer to delete a single message from the INBOX to Trash. This is happening for him from multiple IMAP clients so it appears to be server-side. I wanted to start up a test instance of dovecot alongside the production one and test there. So I copied dovecot.conf, put imap on port 10143, and started up the test server like this: # strace -tt dovecot -F -c /etc/dovecottest.conf (I could not find the docs for -F but without it dovecot would quickly detatch into a daemon and I could no longer strace it... so is -F for putting dovecot in the foreground like I think? :-) I noticed two things when I did this: 1. My screen just scrolled continuously with poll calls - does dovecot poll something every second even when it has no clients connected? 2. It appeared to interfere with the production install running alongside of it - as I could no longer authenticate to it or copy messages to my Sent folder when I sent something out through the production dovecot. I had to restart the production instance to get it to behave. So my questions are whether all that polling output is normal and also, is my testing method really interfering with the production server, and if so, how to avoid that? Thanks, Fran -- Fran Fabrizio Senior Systems Analyst Department of Computer and Information Sciences University of Alabama at Birmingham http://www.cis.uab.edu/ 205.934.0653

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[Dovecot] moving from postfix+dovecot to postfix+dovecot+postfixadmin+mysql
by albi 10 May '06

10 May '06

hi, i know this is not really a dovecot-question, but (after searching for hours and hours) here goes : last week i've tested a setup with postfixadmin and dovecot, and i'm very happy with the result! it's running on a FreeBSD-server but i've used this howto (which describes the setup for debian) : http://bliki.rimuhosting.com/space/knowledgebase/linux/mail/postfixadmin+on… big question is : how can i convert the already existing passwords from the mail-users to the mysql-based auth in postfixadmin/dovecot ------------------------------------------ thanks for having dovecot available, it's great to work with ! :) -- grtjs, albi gpg-key: lynx -dump http://scii.nl/~albi/gpg.asc | gpg --import

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[Dovecot] managesieve daemon
by Gerald Dachs 10 May '06

10 May '06

Hi, I am currently working on a managesieve daemon, so that I can use the squirrelmail plugin avelsieve together with dovecot-lda. Without this I can't migrate from cyrus to dovecot. For several reasons I don't use the timsieved from cyrus and build it from scratch. Is this interesting for somebody else? Gerald

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[Dovecot] Imap folders missing after updating
by Fred Harris 10 May '06

10 May '06

I just updated from 0.99.14 to 1.0beta2 on FC5 and my my IMAP folders have mainly disappeared in my Thunderbird client. All that's left is Inbox and Trash. Is there some configuration setting that's now necessary to make the server think an account uses IMAP folders? The way it seemed to work before was that the presense of a Maildir directory in a user's home indicated IMAP. The new server seems to read the Maildir directory but it doesn't recognize all the folders. Thanks. --------------------------------- Talk is cheap. Use Yahoo! Messenger to make PC-to-Phone calls. Great rates starting at 1¢/min.

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[Dovecot] SIEVE: Any information at all?
by Leah Cunningham 09 May '06

09 May '06

Hi, I am quickly losing the will to live over the lack of any kind of information at all about the SIEVE support that is listed in the dovecot features list. Does anyone have any information at all? I've grepped through the source, looked through all the configuration files, and googled a fair bit and come up with nothing at all. How would a user with maildir enable a sieve script? Does it run on port 2000? How can I test functionality? Thanks, Leah

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[Dovecot] auth: pam_setcred() failed: Error in service module
by Martin Stockinger 09 May '06

09 May '06

Hi, I have a strange problem with authentication. Some users can successfully authenticate and some users can not authenticate. All users use the same client (thunderbird-1.5.0.2-win32-de). At the problematic users i get the following error message: ============ snip =================== auth(default): client in: AUTH 8 PLAIN service=IMAP secured lip=10.24.1.6 rip=10.211.11.1 auth(default): client out: CONT 8 auth(default): client in: CONT<hidden> auth(default): pam(pgerlesb,10.211.11.1): pam_setcred() failed: Error in service module auth(default): client out: FAIL 8 user=pgerlesb auth(default): client in: AUTH 9 PLAIN service=IMAP secured lip=10.24.1.6 rip=10.211.11.1 resp=<hidden> auth(default): pam(pgerlesb,10.211.11.1): pam_setcred() failed: Error in service module auth(default): client out: FAIL 9 user=pgerlesb imap-login: Aborted login: user=<pgerlesb>, method=PLAIN, rip=10.211.11.1, lip=10.24.1.6, TLS ============ snap =================== The username and password is right. I can "su - <username>" at the dovecot host with the same password. Some other users can authenticate without any problems. I have set in dovecot.conf: auth default { mechanisms = plain passdb pam { args = "*" } userdb passwd { } } I have configured PAM to do the authentication against Kerberos5. The user data come from an LDAP directory. What could be the problem? Thanks Martin Stockinger

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[Dovecot] Encrypted IMAP only from Internet, unencrypted POP3 from internal network
by Rainer Frey 09 May '06

09 May '06

Hi, we have following situation: I migrated our company mailserver from POP3 only to dovecot with IMAP and POP. We need to have unencrypted POP3 from our internal network, and the subnet our mailserver is in. Additionally, we now want to allow encrypted IMAP from the internet (for some defined accounts), preferably with TLS (which means I open Port 143 in our firewall). Now, how can I achieve that they can't use unencrypted plaintext authentication from Internet, while I allow unencrypted POP3 from the mailserver and private network? (I can require using encryption for IMAP from our internal net, but I must have unencrypted POP3 as we use software that retrieves mail via POP3 that doesn't support encryption). My idea was: - use disable_plaintext_auth for IMAP only - use disable_plaintext_auth for internet, but not our networks - allow connection from the internet only for certain accounts, and limit them to use encryption Internet access for POP3 is not necessary. Is any of this possible with dovecot? Or another way to achieve my goal? Non-plaintext authentication is not possible, as we use linux system accounts with shadow passwords. TIA Rainer Frey -- Software Development ------------------------------------------------------ Inxmail GmbH

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Re: [Dovecot] Imap folders missing after updating
by Mark E. Mallett 09 May '06

09 May '06

> LOL, there are only about a billion web pages that are "2 clicks" from > the front page of any site. True if you are just wandering around willy-nilly. It's not like it's tacked up on a pole on Alpha Centauri. I was opining that "Documentation" -> "Upgrading" is pretty easy to find, and not at all in line with "undocumented configuration changes." Come to think of it, it's only one click away from where the README tells you to look. But you do have to look, and care to look. Me, I was grateful that it was there; it didn't have to be. > This is why people still stay in the MS heard. Any number of problems > like this would cost most companies thousands of dollars to resolve. > It's much cheaper just to pay a company like MS who take upgrade > transitions seriously. Not gonna touch that. And true transition starts from within :) People won't bite too hard if you ask, either. Nip, maybe. mm (who obviously should be working)

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