Cisco IronPort AsyncOS for Web - (v. 10.6.0) - license - 1 appliance

All Cisco Email Security appliances are powered by the Cisco AsyncOS operating system for high performance and security. Designed to meet the inbound and outbound needs of the email infrastructures, these appliances offer advanced mail delivery features such as comprehensive queue management, bounce handling and connection management. These features help ensure that email infrastructure is not overwhelmed, even during the largest virus outbreaks or spam attacks. They also save money on hardware, rack space, power, and IT administration time.