I have configured a server with -Xms64M and -Xms64M, configured MaxSize at 10M on my destination and I was able to send 500K messages to the server, without having a consumer, and later consume then as nothing special was happening. It worked so nicely that I thought I configured something wrongly, but I double checked all the configs and everything is working fine. I tested the 500K using 4 scenarios: - NonPersistent, NonTransactional - Persistent, NonTransactional - NonPersistent, Transactional - Persistent, Transactional I will start merging this on trunk now, as it will be easier to fix EasyMock tests on trunk (as some other refactoring may be happening till then). And BTW: Let me know if you plan any change around PostOffice at Trunk on the next few days. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4173045#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...