Maia Mailguard is a web-based interface and management system based on the 
popular amavisd-new e-mail scanner and SpamAssassin. Written in Perl and PHP, 
Maia Mailguard gives end-users control over how their mail is processed by 
virus scanners and spam filters, while giving mail administrators the power 
to configure site-wide defaults and limits.

WWW: http://www.maiamailguard.com/