Error code
| Message State | Description |
| SCHEDULED | The message is scheduled. Delivery has not yet been initiated.A message submitted with a scheduled delivery time may return this state when queried. This value was added for V5.0 of SMPP and V3.4 and earlier MCs are likely to return ENROUTE for scheduled messages. |
| ENROUTE | The message is in enroute state. This is a general state used to describe a message as being active within the MC. The message may be in retry or dispatched to a mobile network for delivery to the mobile. |
| DELIVERED | Message is delivered to destination The message has been delivered to the .destination. No further deliveries will occur. |
| EXPIRED | Message validity period has expired.The message has failed to be delivered within its validity period and/or retry period. No further delivery attempts will be made. |
| DELETED | Message has been deleted.The message has been cancelled or deleted from the MC. No further delivery attempts will take place. |
| UNDELIVERABLE | Message is undeliverable.The message has encountered a delivery error and is deemed permanently undeliverable. No further delivery attempts will be made.Certain network or MC internal errors result in the permanent non-delivery of a message. Examples of such errors would be an unknown subscriber or network error that indicated that the given destination mobile was denied SMS service or could not support SMS. |
| ACCEPTED | Message is in accepted state (i.e. has been manually read on behalf of the subscriber by customer service). This state is used to depict intervention on the MC side. Sometimes a malformed message can cause a mobile to power-off or experience problems. The result is that all messages to that mobile may remain queued until the problem message is removed or expires.In certain circumstances, a mobile network support service or administrator may manually accept a message to prevent further deliveries and allow other queued messages to be Delivered. |
| UNKNOWN | Message is in invalid state. The message state is unknown. This may be due to some internal MC problem which may be intermediate or a permanent.This state should never be returned. A MC experiencing difficulties that prevents it from returning a message state, would use this State. |
| REJECTED | Message is in a rejected state. The message has been rejected by a delivery interface. The reasons for this rejection are vendor and network specific. No further delivery attempts will be made |
| SKIPPED | The message was accepted but not transmitted or broadcast on the network.A skipped message is one that was deliberately ignored according to vendor or network-specific rules. No further delivery attempts will be made. |
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