David G. Mackay 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 )