Cisco IronPort Email Security Appliances protect against messaging threats. They're easy to manage, flexible, and provide details about content entering and leaving your email system.

Barracuda The Barracuda Spam Firewall manages all inbound and outbound email traffic to protect organizations from email-borne threats and data leaks. As a complete email management solution, organizations can encrypt messages and leverage the cloud to spool email if mail servers become unavailable.The Barracuda Spam Firewall is offered without per-user or per-feature fees, and is also available as a virtual appliance. For hosted email security