www.horde.org, IMP is a nice free PHP/IMAP (use Cyrus) webmail system. 
Also I suggest Postfix rather than Sendmail.

i run this setup on freebsd.

adam


From: "Wizaerd" <wizaerd@wizaerd.com>
To: "Phx Linux Group" <plug-discuss@lists.PLUG.phoenix.az.us>
Subject: Looking for dedicated server hosting
Date: Wed, 26 Jul 2000 18:52:00 -0700
charset="iso-8859-1"
Reply-To: plug-discuss@lists.PLUG.phoenix.az.us

I'm currently running a website hosted with a hosting service, but
unfortunately the needs of the website are becoming to limited in a
hosted
environment.  I'm looking for an affordable co-location or dedicated
hosting
provide (keyword affordable) that'll allow me to use
Linux/Apache/mySQL/and
PHP4.  Some of the services we want to offer on this site are free email
accounts based on our domain, DNS maintenance (since I know next to
nothing
about DNS) and the ability to run two web sites or virtual sites on the
same
box.  I would prefer them to be local if possible.

Anyone have any suggestions?

Thanx!