Cisco Email Security Appliance

These are some of the functions of the Cisco ESA:

• Block known threats
• Remediate against stealth malware that evaded initial detection
• Discard emails with bad links
• Block access to newly infected sites
• Encrypt content in outgoing email to prevent data loss

The Cisco ESA device is designed to monitor Simple Mail Transfer Protocol (SMTP)

The Cisco ESA is constantly updated by real-time feeds from the Cisco Talos, which detects and correlates threats and solutions by using a worldwide database monitoring system

This threat intelligence data is pulled by the Cisco ESA every three to five minutes