A message interchange gateway for transferring messages between a first party and a second party includes an ingress module, arranged to accept at least one message from the first party, a session manger arranged to accept the at least one message from the ingress module, the session manager being further arranged in co-operation with a storage device having data, a message queuing module having at least one session-based message queue, and at least a first session handler having a first session. The first session handler is arranged in co-operation with a first session-based message queue for the processing of the at least one message according to an instruction from the session manager. The instruction is at least partially based on the data, and the first session handler is further arranged to dispatch, after processing, the at least one message from the first session-based message queue to the second party.