Easiest virtual mail setup?

[lists at kikobu.com (Morten)]

Hi.

I wish to configure a CentOS 4.1 box to be a mail server. I'd like a 
setup with virtual mail accounts, using eg. exim, courier and mysql.

Do any applications exist that already combine this in an easy to deploy 
manner (yum as far as possible)? I've seen XAMS.org but that's discontinued.

Br,

Morten