SMS Delivery States
| Type | Value | Description |
|---|---|---|
| ENROUTE | 1 | The message is in enroute status |
| DELIVERED | 2 | Message delivered to destination |
| EXPIRED | 3 | Message validity period has expired |
| DELETED | 4 | Message has been deleted |
| UNDELIVERABLE | 5 | Message is undeliverable |
| ACCEPTED | 6 | Message is in an “accepted” state (i.e. the message has been manually read on behalf of the subscriber by customer service) |
| UNKNOWN | 7 | Message is in an invalid state |
| REJECTED | 8 | Message is in a rejected state |