The best Email Security vendors are Cisco Email Security, Fortinet FortiMail, Proofpoint Email Protection, Barracuda Email Security Gateway, and Sophos Email Appliance [EOL].
Cisco is the top solution according to IT Central Station reviews and rankings.
One reviewer writes: "The amount of traffic that it stops is massive", and another reviewer writes: "Black-listing and white-listing are highly intuitive and easy to do".
The 2nd best product is Fortinet FortiMail. A user writes: "A full-featured email gateway that monitors email intelligently to block, isolate and assess traffic",
and another reviewer writes: "Actively works to ensure reliable delivery and containment of threats and spam".
See our free Buyer's Guide for Email Security.