Default Value

""

Remarks

This property corresponds to the Receipt-delivery-option header in Request. If nonempty, the client has requested that the receipt be sent to the URL specified asynchronously. If empty, the receipt is to be delivered synchronously in the HTTP reply. In either case the receipt may be delivered by invoking SendResponse.

ReceiptDeliveryOption does not indicate whether or not a receipt was actually requested. If an MDN was requested, that information is given in MDNTo.

This property is read-only.