OpenProtect

OpenProtect is an Open Source E-Mail Filtering Solution for Linux/BSD E-Mail Servers.

features and advantages of OpenProtect:

Integrated package of Antivirus + Antispam + Content Filtering
AntiVirus: Clam AntiVirus
AntiSpam: SpamAssassin
Content Filtering: SpamAssassin and MailScanner
4 MTA Support: Sendmail, Postfix, Exim and Qmail
Easy Installation and Maintenance
OpenProtect is GPL/Free software.
Easy install under 5-10 minutes and no editing configuration files
Commercial OpenProtect Support & Kaspersky AntiVirus Technology License available

(Opencomputing Team)