## DeliveryNotificationOptions enumeration (5 values)

Specifies delivery notifications.

| Value | Description |
| --- | --- |
| None | No notification information will be sent. The mail server will utilize its configured behavior to determine whether it should generate a delivery notification. |
| OnSuccess | Notify if the delivery is successful. |
| OnFailure | Notify if the delivery is unsuccessful. |
| Delay | Notify if the delivery is delayed. |
| Never | A notification should not be generated under any circumstances. |