DeliveryNotification Property

This property sets the delivery notifications for this e-mail message.

Data Type: Long

Set the property to any combination of the following values:

Value Meaning
0 Using the SMTP server default notification, most SMTP server only sends the notification when the email cound't be delivered to recipient.
2 Notify if the delivery is successful.
4 Notify if the delivery is unsuccessful.
8 Notify if the delivery is delayed.
16 Never notify.

Remarks

If you don't set this property, SMTP server only sends the failure report back to the sender. Because not every SMTP server support above options, if you don't have special requirement, please set it to 0.