Each message contains a built-in facility for supporting application-defined property values. These message properties allow you to implement application-defined message filtering.
Message properties are name-value pairs that you can optionally insert into messages to provide structure. For example, in the .NET API the predefined message property ias_Originator, identified by the constant MessageProperties.ORIGINATOR, provides the message store ID that sent the message. Message properties can be used in transmission rules to determine the suitability of a message for transmission.
There are two types of message property:
Predefined message properties These message properties are always prefixed with ias_ or IAS_.
Custom message properties These are message properties that you defined. You cannot prefix them with ias_ or IAS_.
In either case, you access message store properties using get and set methods and pass the name of the predefined or custom property as the first parameter.
Predefined message properties
Custom message properties
Managing message properties
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