PidTagTnefCorrelationKey Property

Type: PtypBinary ([MS-OXCDATA] section 2.11.1)

The PidTagTnefCorrelationKey property ([MS-OXPROPS] section 2.1037) contains a value that correlates a Transport Neutral Encapsulation Format (TNEF) attachment with a message. This property determines whether or not an inbound TNEF file belongs to the message it is attached to. It is used primarily by transport providers and gateways.