Cisco Cisco Email Security Appliance C160 Mode D'Emploi

Page de 1185
 
9-23
Cisco AsyncOS 8.5.6 for Email User Guide
 
Chapter 9      Using Message Filters to Enforce Email Policies
  Message Filter Rules
True Rule
The 
true
 rule matches all messages. For example, the following rule changes the IP interface to external 
for all messages it tests.
Valid Rule
The 
valid
 rule returns false if the message contains unparsable/invalid MIME parts and true otherwise. 
For example, the following rule drops all unparsable messages it tests.
Subject Rule
The 
subject
 rule selects those messages where the value of the subject header matches the given regular 
expression. 
For example, the following filter discards all messages with subjects that start with the phrase 
Make 
Money...
You can specify non-ASCII characters to search for in the value of the header.
externalFilter:
   if (true)
   {
        alt-src-host('external');
   }
not-valid-mime:
   if not valid
   {
        drop();
   }
scamFilter:
   if (subject == '^Make Money')
   {
        drop();
   }