Several AMQP 1.0 servers support for 'anonymous sender' links, where the link is establsihed to a target with null address, then each message carries its destination in its "to" field.
The AMQP 1.0 JMS client uses this when advertised via the "ANONYMOUS-RELAY" connection capability. If not advertised, it falls back to opening and closing individual links for each destination (with optional caching).
QPIDJMS-227 showed that the Java broker does not advertise/have this support, as the client was in 'fallback mode' at the time.
In the new JMS 2.0 'simplified API', all producers are anonymous.