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Email Security with Cisco IronPort by Chris Porter

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Chapter 11. Message and Content Filters

In this chapter, you will learn the following:

• What the message filters and content filters features are used for and the differences between the two engines

• When to use message filters over content filters

• Low-level information on filter conditions and actions and performance considerations

Filtering Email Messages with Custom Rules

The Email Security Appliance (ESA) platform and its AsyncOS software has a huge number of features for almost any email task that would be encountered in production, from connection controls, through message routing and address rewriting, to control over final delivery. Tables like HAT, RAT, SMTPRoutes, and Destination Controls offer extensive control. Security filtering ...

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