Vote for FTGateRelay
FTGateRelay is a system that connects any mail server to the Internet and provides content filtering, POP3 mail retrieval, security features and anti-virus integration to be included without having to replace your primary mail server. Users of systems such as Microsoft Exchange, Lotus Domino and others can now add features such as Key word and Key Phrase filtering, Attachment Filtering, Anti-Virus support, Comprehensive routing and more.