| Opencomputing Technologies provides Server Side E-Mail Protection(AntiVirus, AntiSpam and Content Filtering) using OpenProtect - An Open Source E-Mail Filtering Solution for Linux E-Mail Servers. MTA's supported are: Sendmail, Postfix, Exim and Qmail.
Some of the features are:
Anti-Virus: Clam AntiVirus is the one you get with this opensource package.
Anti-Spam: SpamAssassin
Content Filtering: SpamAssassin and MailScanner
4 MTA Support: Sendmail, Postfix, Exim and Qmail
Easy Installation and Maintainance: The Scripts openprotect-install, openprotect-uninstall, openprotect-disable, openprotect-enable and openprotect-sendstats take care of installing, uninstalling, disabling, enabling and log generation respectively.
Supports All *Linux and *BSD Systems
If you are interested in a Commercial AntiVirus & Support at USD $600 per server per year, take a look at http://opencompt.com/openprotect |