2.1.3.6.1.1 Generating a Value for the Action Field

The value of the Action field, as specified in [RFC3464], is determined by the value of the PidTagMessageClass property ([MS-OXCMSG] section 2.2.1.3) on the message, as specified in the following table.

Value of PidTagMessageClass property

Value of Action field

*.DR

delivered

*.Expanded.DR

expanded

*.Relayed.DR

relayed

*.Delayed.DR

delayed

*.NDR

failed