Quality Of Service: AT_MOST_ONCE
33.4. Quality Of Service The quality of service modes used by the bridge are described here in more detail. 33.4.1. AT_MOST_ONCE With this QoS mode messages will reach the destination from the source at most once. The messages are consumed from the source and acknowledged before sending to the destination. Therefore there is a possibility that if failure occurs between removing them from the source and them arriving at the destination they could be lost. Hence delivery will occur at most once. This mode is available for both durable and non-durable messages.