Excellent RPMS are available.
Here's what I'm using:
> rpm -q -i exim
Name : exim Relocations: (not relocateable)
Version : 3.03 Vendor: University of Cambridge / Philip Hazel <ph10@???>
Release : 1 Build Date: Thu 11 Nov 1999 01:04:33 PM EST
Install date: Mon 15 May 2000 01:56:42 PM EDT Build Host: rpppc2.hns.com
Group : Networking/Daemons Source RPM: exim-3.03-1.src.rpm
Size : 3545198 License: GPL
Packager : Mark Bergsma <mark@???>
URL : http://www.exim.org
Summary : exim mail transfer agent
Description :
Exim is a mail transport agent (MTA) developed at the University of
Cambridge for use on Unix systems connected to the Internet. In style
it is similar to Smail 3, but its facilities are more extensive, and
in particular it has options for verifying incoming sender and
recipient addresses, for refusing mail from specified hosts, networks,
or senders, and for controlling mail relaying. Exim is in production
use at quite a few sites, some of which move hundreds of thousands of
messages per day.