Cisco Cisco Email Security Appliance C650 Guía Del Usuario
9-23
User Guide for AsyncOS 9.8 for Cisco Email Security Appliances
Chapter 9 Using Message Filters to Enforce Email Policies
Message Filter Rules
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True Rule
The
true
rule matches all messages. For example, the following rule changes the IP interface to external
for all messages it tests.
externalFilter:
if (true)
{
alt-src-host('external');
}