Symantec Email Security.cloud filters unwanted messages and protects users from targeted attacks. The service has self-
learning capabilities and Symantec intelligence to deliver highly effective and accurate email security. Encryption and data loss
prevention help you control sensitive data. It supports Microsoft Office 365, Google Apps, on premises or hosted Microsoft
Exchange, and other mailbox services, delivering always-on, inbound and outbound messaging security. It is designed…
Barracuda's ESS is the premier product, it boasts outbound email encryption as an included service as well as all of the security features of Symantec Email Security.cloud. Sophos is on the same level as SES.c but is not quite as feature rich.