req Inbound Originator

1.3.6.1.4.1.334.3.1.2.2.1.9

Identifies the originator of the message in its received form, expressed in string format. The style and format of this identifier varies according to a specific messaging technology. As a result of potentially disparate messaging technologies, this identifier is only guaranteed to be the name known to the end-user on the first MTA in the delivery sequence. Set to an empty (zero length) string if unknown or irrelevant to query.