- dovecot - dovecot.org

Re: [Dovecot] Dovecot strong or not for a big Webmail architecture
by Bill Boebel 04 Aug '07

04 Aug '07

On Thu, August 2, 2007 3:06 pm, John fistack <john.fistack(a)yahoo.fr> said: > I know webmail.us use Dovecot, what is the most big dovecot architecture known ? > Do you think Dovecot can handle 1 million of active users in a good architecture ? Yep... and we have 500K very active users on it. We've scaled Dovecot horizontally without NFS, just lots of independent Dovecot server intances with smart proxy/mail-routing infrastructure around it. It can easily scale to millions of users this way. Just make sure you throw enough disks at it and you'll be fine, with or without NFS. > Do you think it's a good solution to use one synchronised local Openldap on each > server Dovecot ? No. I'd replicate your ldap database on a few servers that are dedicated to that purpose, and on each mail server use Dovecot's auth_cach feature to minimize how often it needs to query ldap. > Do you think It's possible to use Postgresql or MySQL instead of Openldap ? We use MySQL. MySQL handles frequent writes better than OpenLDAP from our experience. It is also simpler for us to do replication and troubleshooting because we employ several MysQL gurus already. > Are cyrus or courrier-imap better solutions ? Definitely not courier-imap, because of it's lack of indexes. Not sure about Cyrus. > Someone say "Zimbra is highly scalable and fast", I think Zimbra could be to heavy > in this architecture, is Dovecot scalable ? My opinion is Zimbra is too heavy beccause of the way mail is stored on the backend. Dovecot with maildir scales out well, and the promise of dbox mail storage format appears that it will make it even more scalable down the road. Bill

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[Dovecot] MD5 mis-match
by Big Pizzle 03 Aug '07

03 Aug '07

Hi all, I'm almost finished building our new load balanced email server that are attached to an NFS mountpoint. There are currently two e-mail servers connected to the NFS share. Both email servers are running CentOS 4.5 with Postfix 2.4.3, Dovecot 0.99, and authenticating via LDAP. Dovecot is using Maildir format. I've been trying to do some benchmarks using Postal and Rabid, and whenever I run rabid, I'm getting errors like this: MD5 mis-match, calculated:a628289996ce19910ebbd4eef2ebc3fc, expected 9406a7cf56afb5a1308eb5377e141719! However, when I tail the /var/log/maillog, I don't see errors - I just see the pop3-login. Just wondering if that is okay. I've also been trying to find an RPM for Dovecot 1.0.3, with no avail. Anyone know where I can get one? Thanks in advance. Patrick

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Re: [Dovecot] Missing MIME-Version header in e-mails.
by Bill Boebel 03 Aug '07

03 Aug '07

On Wed, August 1, 2007 9:51 am, Timo Sirainen <tss(a)iki.fi> said: > On Wed, 2007-08-01 at 19:50 +0800, Tan Shao Yi wrote: >> Hi, >> >> I notice that in src/lib-mail/message-parser.c, there is a section of >> code that checks for the presence of MIME-Version before allowing >> processing of the Content-* headers. >> >> Is there a possibility of relaxing this rule? There are some broken >> mailers, in particular newsletter mailers that do not seem to honour the >> MIME-Version header, though they do send the Content-Type. > > I suppose this could be changed. At least UW-IMAP also does that.. Or at least make relaxing it an option in v1.1. I personally think it should be relaxed. Bill

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[Dovecot] Looking for RPM for 1.0.3 for CentOS with imap, ldap, and ssl
by Big Pizzle 03 Aug '07

03 Aug '07

Hi, I don't know how to compile Dovecot from src rpm;s - in fact I tried and failed miserably. The only other src rpm I have ever built was postfix, and I ran into a whole bunch of errors trying to build an rpm from the src rpm at ATRpm. Anywho, I was wondering if one of you wonderful Dovecot members would be willing to create an RPM for CentOS 4.5 that includes ldap and ssl. Or, if someone knows of a URL I can go to and follow a Dovecot-related src rpm build tutorial, that would be of great help too. Heck - I'll even settle for a 1.0.2. Since Dovecot doesn't support 0.99 I want to make sure I have the most recent package. Thanks in advance. Patrick

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[Dovecot] Dovecot strong or not for a big Webmail architecture
by John fistack 03 Aug '07

03 Aug '07

Hello, Do you think Dovecot could handle millions of active users in a big architecture ? This cluster could be for example (each server is a bi quad Xeon 2.66 Ghz) : - 40 Dovecot servers - 4 LVS - 20 Apache+PHP - 2 Openldap - 20 Postfix + ClamAV + SpamAssassin - 1 NFS Netapps For millions of user it could be multiple different clusters of 40 Dovecot servers with 1 Netapp for each cluster. I want to work in NFS. I've experimented problem with Cyrus and NFS on Netapp. I want to use maildir, I can manage limitations of inodes with Netapp. I know webmail.us use Dovecot, what is the most big dovecot architecture known ? Do you think Dovecot can handle 1 million of active users in a good architecture ? Do you think it's a good solution to use one synchronised local Openldap on each server Dovecot ? Do you think It's possible to use Postgresql or MySQL instead of Openldap ? Are cyrus or courrier-imap better solutions ? Someone say "Zimbra is highly scalable and fast", I think Zimbra could be to heavy in this architecture, is Dovecot scalable ? Thank you for your ideas. Regards. John Fistack _____________________________________________________________________________ Ne gardez plus qu'une seule adresse mail ! Copiez vos mails vers Yahoo! Mail

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[Dovecot] dovecot 1.0.2, sieve 1.0.2 and regex
by Alexander Hoogerhuis 03 Aug '07

03 Aug '07

I've just ported a largeish procmail script across to sieve and want to get to use wildcards in filing mail and can't seem to get regex to work. The script starts nicely with: > require ["fileinto","regex","envelope","vacation","regex"]; and a bit down these few lines comes into play: > elsif header :regex "From" "logwatch.*stuff.com" { > fileinto "INBOX.Admin/Logwatch Stuff"; > } and regex just never seem to catch. I have 50ish machines in the stuff.com domain, and writing an induvidual section like this works: > elsif header :contains "From" "logwatch(a)a.stuff.com" { > fileinto "INBOX.Adin/Logwatch Stuff"; > } > elsif header :contains "From" "logwatch(a)b.stuff.com" { > fileinto "INBOX.Adin/Logwatch Stuff"; > } etc. But this shouldn't be neccesary? mvh, A

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[Dovecot] how to "authenticate plain" ???
by Steffen Brunk 02 Aug '07

02 Aug '07

Hello list, my name is Steven and of course: I got a problem... we are using dovecot 0.99 because it´s the actual stable version for RedHat 4 Enterprise. I am trying to authenticate using "PLAIN" but I don´t know how. that´s what I am doing: telnet conny.MYDOMAIN.de 143 Trying IP.AD.RE.SS... Connected to conny.MYDOMAIN.de. Escape character is '^]'. * OK dovecot ready. a1 authenticate plain + a1 NO Authentication failed. what do I have to send after receiving the "+"-symbol? dovecot is waiting for something base64-encoded and I tried to give him by typing my username and pass and encrypted it here : http://www.php-einfach.de/base64_generator.php But I don´t know the correct syntax and it drives me crazy.... thanks for ANY help Steve .

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[Dovecot] Editing sieve files
by jalal 02 Aug '07

02 Aug '07

Hi all I've got a standard dovecot setup: home is /var/spool/vmail/domain/user/ uid: vmail gid: vmail Sieve file is: /var/spool/vmail/domain/user/.dovecot.sieve if i want to change the dovecot-sieve file to modify the rules (or even let my users do it at some point) then it has to been done by root. Is there a way to setup the sieve plugin so a user can create his own rules? sort of like ~/.procmailrc TIA jalal

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[Dovecot] v1.0.3 released
by Timo Sirainen 02 Aug '07

02 Aug '07

http://dovecot.org/releases/1.0/dovecot-1.0.3.tar.gz http://dovecot.org/releases/1.0/dovecot-1.0.3.tar.gz.sig - deliver: v1.0.2's bounce fix caused message to be always saved to INBOX even if Sieve script had discard, reject or redirect commands. - LDAP: auth_bind=yes and empty auth_bind_userdn leaked memory - ACL plugin: If user was given i (insert) right for a mailbox, but not all s/t/w (seen, deleted, other flags) rights, COPY and APPEND commands weren't supposed to allow saving those flags. This is technically a security fix, but it's unlikely this caused problems for anyone. - ACL plugin: i (insert) right didn't work unless user was also given l (lookup) right. - Solaris: Fixed filesystem quota for autofs mounts.

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[Dovecot] migrating users
by Pete McEvoy 02 Aug '07

02 Aug '07

Hi. I've been migrating users from mbox to maildir on a new server running dovecot 1.0 - is there any method I can employ to prevent my pop3 users having to redownload mails after I move them? Thanks -- Pete

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