Cisco Cisco Email Security Appliance C170 Guia Do Utilizador

You can specify non-ASCII characters to search for in the value of the header.

The following example demonstrates the header rule without a comparison. In this 
case, if the header 

X-DeleteMe

 is found, it is removed from the message.

DeleteMeHeaderFilter:

   if header('X-DeleteMe')

   {

        strip-header('X-DeleteMe');

   }

When working with headers, remember that the current value of the header 
includes changes made during processing (such as with filter actions that add, 
remove, or modify message headings). See 

 for more information.

The 

random

 rule generates a random number from zero to N-1, where N is the 

integer value supplied in parenthesis after the rule. Like the 

header()

 rule, this 

rule may be used in a comparison, or may be used alone in a “unary” form. The 
rule evaluates to 

true 

in the unary form if the random number generated is 

non-zero. For example, both of the following filters are effectively equal, 
choosing Virtual Gateway address A half the time, and Virtual Gateway address 
B the other half of the time: 

        bounce();

   }

load_balance_a:

   if (random(10) < 5) {

        alt-src-host('interface_a');