In WebSphere Message Broker, the Topic property of the MQInput node can be used to route messages that do not contain publish/subscribe parameters. This feature does not apply to MQRFH subscribers.
MQRFH subscribers expect to receive publications, with a well-formed MQRFH header, from both WebSphere MQ Publish/Subscribe and WebSphere Message Broker clients.
In the latter case, the original MQRFH2 header is converted as described earlier in this topic. However, if the message does not contain publish/subscribe information in either an MQRFH or an MQRFH2 header, the default topic is not used to send publications to an MQRFH subscriber.