Cisco Cisco Email Security Appliance C160 Mode D'Emploi

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User Guide for AsyncOS 10.0 for Cisco Email Security Appliances
 
Chapter 9      Using Message Filters to Enforce Email Policies
  Message Filter Actions
Bypass File Reputation Filtering and File Analysis System Actions
The 
skip-ampcheck
 action instructs the system to allow message to bypass File Reputation Filtering and 
File Analysis configured on the system. This action does nothing to the message if File Reputation 
Filtering and File Analysis is not configured, or if the message was never flagged to be scanned for File 
Reputation Filtering and File Analysis in the first place.
The following example specifies that messages with PDF attachments should bypass File Reputation 
Filtering and File Analysis.
skip_amp_scan:
if (attachment-filetype == 'pdf') 
{
skip-ampcheck();
}
Bypass Outbreak Filter Scanning Action
The 
skip-vofcheck
 action instructs the system to allow the message to bypass the Outbreak Filters 
scanning. This action does nothing to the message if Outbreak Filters scanning is not enabled.
The following example specifies that messages received on the listener “private_listener” should bypass 
Outbreak Filter scanning.
Add Message Tag Action
The 
tag-message
 action inserts a custom term into an outgoing message to use with RSA Email DLP 
policy filtering. You can configure a RSA Email DLP policy to limit scanning to messages with the 
message tag. The message tag is not visible to recipients. The tag name can contain any combination of 
characters from the set 
[a-zA-Z0-9_-.]
.
For information on configuring a DLP policy to filter messages, see the “Data Loss Prevention” chapter.
The following example inserts a message tag into a message with “[Encrypt]” in the subject. You can 
then create a DLP policy that will encrypt messages with this message tag before delivering them if 
Cisco Email Encryption is available:
internal_mail_is_safe:
   if (recv-listener == 'private_listener') Outbreak Filters
   {
        skip-vofcheck();
   }
Tag_Message:
   if (subject == '^\\[Encrypt\\]') 
   {
        tag-message('Encrypt-And-Deliver');
   }