Руководство Пользователя для Cisco Cisco Email Security Appliance C170

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Cisco IronPort AsyncOS 7.6 for Email Advanced Configuration Guide

OL-25137-01

Chapter 6 Using Message Filters to Enforce Email Policies

The following example adds a header if the message has an X.509 certificate:

The following example adds a header if the message’s certificate does not have a signer:

Message Filter Actions

The purpose of message filters is to perform actions on selected messages.

The two types of actions are:

•

Final actions — such as

deliver

drop

, and

bounce

— end the processing of a message, and permit

no further processing through subsequent filters.

•

Non-final actions perform an action which permits the message to be processed further.

Non-final message filter actions are cumulative. If a message matches multiple filters where each filter
specifies a different action, then all actions are accumulated and enforced. However, if a message
matches multiple filters specifying the same action, the prior actions are overridden and the final filter
action is enforced.

Filter Actions Summary Table

Message filters can apply the following actions shown in

Table 6-5

to an email message.

notify("admin@example.com");

}

AnyX509: if signed-certificate ("issuer") {

insert-header("X-Test", "X.509 present");

}

NoSigner: if not signed-certificate ("signer") {

insert-header("X-Test", "Old X.509?");

}