Cisco ESA C395 Email Security

The Cisco Email Security Appliance (ESA) C395 is designed to serve as your SMTP email gateway at your network perimeter - that is, the first ESA with an IP address that is directly accessible to the internet for sending and receiving email. Many of the features (including reputation filtering, data loss prevention, content scanning, spam detection, and virus protection) require you to install the ESA into your existing network infrastructure.