Cisco Cisco Email Security Appliance C160 Mode D'Emploi
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Cisco IronPort AsyncOS 7.1 for Email Advanced Configuration Guide
OL-22164-02
Chapter 5 Using Message Filters to Enforce Email Policies
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.
messages it tests.
not-valid-mime:
if not valid
{
drop();
}
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
with the phrase
Make Money...
scamFilter:
if (subject == '^Make Money')
{
drop();
}
You can specify non-ASCII characters to search for in the value of the header.
alt-src-host('external');
}