ReadReceiptRequested Property
True if a read receipt has been requested by the sender. This property corresponds to the MAPI property PR_READ_RECEIPT_REQUESTED. Read/write for e-mail items that have been created but have not been sent or posted; read-only for sent e-mail items.
expression**.ReadReceiptRequested**
*expression * Required. An expression that returns a MailItem object.
Applies to | MailItem Object