| Platform SDK: MAPI | 
The PR_NON_RECEIPT_REASON property contains reasons why a message was not received that forms part of a nondelivery report.
| Header file: | MAPITAGS.H | 
| Must be exposed by: | Nondelivery report message objects | 
| Identifier: | 0x003E | 
| Property type: | PT_LONG | 
| Property tag: | 0x003E0003 | 
| Corresponding X.400 attribute: | IM_NON_RECEIPT_REASON | 
Reasons can include, for example, that the message was discarded.