The PR_ATTACHMENT_X400_PARAMETERS property was originally meant to contain an ASN.1 object identifier specifying how the attachment should be handled during transmission.
| Header file: | MAPITAGS.H |
| Identifier: | 0x3700 |
| Property type: | PT_BINARY |
| Property tag: | 0x37000102 |
| Corresponding X.400 attribute: | IM_EXTERNAL_PARAMETERS |
Do not use this property. It is not supported in MAPI 1.0.