The DSNOptions property lists the Delivery Status Notification (DSN) options for the message.
Property DSNOptions as CdoDSNOptionsHRESULT get_DSNOptions(CdoDSNOptions* pVal); HRESULT put_DSNOptions(CdoDSNOptionsVal);
The CdoDSNOptions enumeration is provided for this property.
Delivery Status Notifications are essentially requests for receipts of message delivery status. The request can be for the enumerated delivery conditions. Note that Delivery Status Notifications can pass through numerous message transfer agents and thus return receipts can have different meanings.
DSNOptions defines the type of Delivery Status Notification requested per Request for Comments (RFC) 1894. The RFC covers the nature and uses of Delivery Status Notifications in depth.