System.ServiceModel 4.0.0.0 System.Enum A message sent to a queue can land in a dead-letter queue because the message was not delivered or the Queue Manager is not sure of the delivery outcome. The DeliveryStatus is a way to get the status of message delivery when the message is read from a dead-letter queue. An enumeration that specifies the delivery status of a message when the delivery of the message is in doubt, or when the message was not delivered. Field 4.0.0.0 System.ServiceModel.Channels.DeliveryStatus The delivery of the message is in doubt. Field 4.0.0.0 System.ServiceModel.Channels.DeliveryStatus The message was not delivered.