Cisco Systems: Application Inspection and Control for SMTP

Application Inspection and Control for SMTP [Cisco IOS Software Releases 12.4 T] - Cisco Systems
The Application Inspection and Control for Simple Mail Transfer Protocol (SMTP) feature provides an intense provisioning mechanism that can be configured to inspect packets on a granular level so that malicious network activity, related to the transfer of e-mail at the application level, can be identified and controlled. This feature qualifies the Cisco IOS Firewall extended SMTP (ESMTP) module as an "SMTP application firewall," which protects in a similar way to that of an HTTP application firewall.