Cisco Cisco Email Security Appliance C170 Guia Do Utilizador

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AsyncOS 9.1.2 for Cisco Email Security Appliances User Guide
 
Chapter 9      Using Message Filters to Enforce Email Policies
  Message Filter Rules
Receiving IP Interface Rule
The 
recv-int
 rule selects those messages received via the named interface. The interface name must be 
the nickname of one of the interfaces currently configured for the system. For example, the following 
filter bounces any message arriving from the interface named 
outside
.
Date Rule
The 
date
 rule checks the current time and date against a time and date you specify. The date rule is 
compares against a string containing a timestamp of the format 
MM/DD/YYYY hh:mm:ss. This is useful to specify actions to be performed before or after certain times 
in US format. (Note that there may be an issue if you are searching messages with non-US date formats.) 
the following filter bounces all messages from 
campaign1@yourdomain.com
 that are injected after 
1:00pm on July 28th, 2003:
Note
Do not confuse the 
date
 rule with the 
$Date
 message filter action variable.
Header Rule
The 
header()
 rule checks the message headers for a specific header, which must be specified quoted in 
parentheses (“header name”). This rule may be compared to a regular expression, much like the 
subject
 
rule, or may be used without any comparison, in which case it will be “true” if the header is found in the 
outsideFilter:
   if (recv-int == 'outside')
   {
        bounce();
   }
TimeOutFilter:
   if ((date > '07/28/2003 13:00:00') and (mail-from == 
      'campaign1@yourdomain\\.com'))
   {
        bounce();
   }