Delivery Status Notification and Return Receipts

There is an SMTP extension that supports Delivery Status Notifications (DSN) defined in RFC 1891. This may or may not be supported by the user's Mail Transport Agent (MTA). The acknowledgements do not indicate whether the user reads the message, they only acknowledge receipt of the message by their mail server. It is possible that the mail server throws the message away as spam and the end user never actually receives the email. To get such notifications, set the StatusNotifyOptions and StatusNotifyReturn properties, as in the following example:

&email.StatusNotifyOptions  = "SUCCESS,FAILURE";
&email.StatusNotifyReturn = "HDRS";

You can use the IsReturnReceiptReqd property to specify if a return receipt should be sent when the mail server receives and opens the email. This property only works if the underlying SMTP server supports this feature. The following is an example of using this property:

&email.IsReturnReceiptReqd = True;