This is a full-transparent proxy-server for email clients. It runs on a Linux box with iptables (for port re-direction). It can be used to provide email scanning from the internet, to any internal network and is ideal for helping to protect your “Other OS” LAN from harm, especially when used in conjunction with a firewall and other Internet Proxy servers.
It is designed to enable scanning of incoming/outgoing email messages for Virus’s, Worms, Trojans, Spam (read as “Un-solicited Bulk Email”), and harmfull attachments. Because viewing HTML mail can enable a “Spammer” to validate an email address (via Web bugs), it can also provide HTML stripping.
nice low cost and high costumizable!