Use filter rules to exclude messages based on message type. In a default out-of-the-box installation, all message types are included and no message filtering is performed.
You can also use filter rules to allow inclusion or exclusion of messages based on values within fields of the message. Only simple equality checks are performed. Exclusions based on message types are faster than checks that require field-level comparisons. The rules specified must adhere to the messagefilter.xsd schema.