Rudi Ahlers wrote:
You might take a look at SquirrelMail. It integrates well with cyrus imap.
I've started liking roundcube a bit more than squirrelmail. but roundcube is very basic. SquirrelMail has a *LOT* of plugins and can be made to do almost anything these days. And the community around squirrelmail is much larger than roundcube.
Another candidate is Horde+IMP ( which Johnny maintains in the centos repos )
Sorry guys, I want to stick with a SMTP / IMAP / POP3 server, not webmail. I'll be using Horde for webmail as well though
Webmail normally just uses the underlying smtp/imap access to the underlying server anyway. If you want something that comes up running with samba, web/ftp services and email with optional web interface you might like SME server (http://www.contribs.org) which has Centos packages plus a simple web administration interface. I'm not sure if it can be set up with drbd/failover but I've always had pretty good luck running software RAID on swappable disks that can be moved to a different chassis in the event of a motherboard or power supply failure.