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Action Variables

In most filters that perform notifications, whether to sender, recipient, or another party, the notification should include data about the message triggering the filter. This is especially true of notifications about dropped or modified messages, or messages that match sensitive data rules. You could create notifications with custom text for each possible matching condition, but it’s far better to include data from the message in question. Users who know exactly why a message was modified or undeliverable will open fewer support tickets and have a clear idea of the rules being enforced. The filters engine on the ESA provides action variables that allow you to include this data.

Action variables start with a $ and are limited to a specific list of supplied variables. You’ve already seen several examples of action variables in this chapter. I used $RemoteIP to add the sender’s IP address to the headers of a message.


  

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