ftp://ftp.funet.fi/pub/mirrors/fedora.redhat.com/pub/fedora/linux/core/development/SRPMS/exim-4.44-1.src.rpm

# rpm -qpi exim-4.44-1.src.rpm

Name        : exim                         Relocations: (not relocateable)
Version     : 4.44                              Vendor: Red Hat, Inc.
Release     : 1                             Build Date: Sat Jan 15 16:55:12 2005
Install Date: (not installed)               Build Host: crowe.devel.redhat.com
Group       : System Environment/Daemons    Source RPM: (none)
Size        : 4590804                          License: GPL
Signature   : (none)
Packager    : Red Hat, Inc. <http://bugzilla.redhat.com/bugzilla>
URL         : http://www.exim.org/
Summary     : The 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.

Exiscan is compiled in to allow inbuilt scanning capability. See
        http://duncanthrax.net/exiscan-acl/