Argh. That was a serious blow. So in order to get a legacy JMS 1.1 client (that cannot run java 5) to talk to JBM you actually need to set up a different JMS provider (non-JBM) in between and move messages back and forth? And solve the previously commented remote replyto/correlation issues? ...which would mean JBossESB when it uses JBM is basically an Enterprise Service Bus that (for JMS) only supports Java 5 clients? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4058111#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...