Cisco Cisco Email Security Appliance C170 사용자 가이드

The IronPort Anti-Spam and IronPort Intelligent Multi-Scan solutions process 
email for incoming (and outgoing) mail based on policies (configuration options) 
you configure using the Email Security Manager feature. IronPort Anti-Spam and 
IronPort Intelligent Multi-Scan scan messages through their filtering modules for 
classification. The classification, or verdict, is then returned for subsequent 
delivery action. Four verdicts are possible: messages can be identified as not 
spam, identified as a unwanted marketing email, positively identified as spam, or 
suspected to be spam. Actions taken on messages positively identified as spam, 
suspected to be spam, or identified as unwanted marketing messages include:

Specifying a Positive or Suspected Spam threshold.

Choosing which overall action to take on unwanted marketing messages, 
positively identified spam, or suspected spam messages: deliver, drop, 
bounce, or quarantine. 

Archiving messages to an mbox-format log file. You must create a log to 
enable archiving messages identified as spam. See 

. 

Altering the subject header of messages identified as spam or marketing.

Sending messages to an alternate destination mailhost.

Adding a custom X-Header to messages.