Vote for RazorGate 450
The RazorGate 450 includes the features: Simple design for deployment in minutes to work with any mail server, powerful spam filtering including MailHurdle technology to yield 98% catch-rates with virtually zero false positives, Mirapoint's customer-proven Full-Spectrum email security technology, integrated virus scanning technology, automatic updates for the latest protection, wiretap capability that is transparent to end-users, optional DirectPath real-time scanning without mail queue hassles, secure, hardened operating system with no known exploits, queue management tools and quarantine queue, integrated LDAP-based routing, redundant hardware components for increased reliability.