Symantec Message Filter is designed for Service Provider environments which need a flexible software integration with the existing MTA. For Enterprise customers, Symantec Messaging Gateway
(on-premises appliance or virtual
appliance), Email Security.cloud
(hosted) or Symantec Mail Security for Exchange
/Symantec Mail Security for Domino
(direct integration with on-premise messaging platform) are the recommended
mail security solutions, providing better protection, more functionality, and built-in message management.