This has been standardized now http://jbws.dyndns.org/mediawiki/index.php/JAX-WS_User_Guide#MTOM.2FXOP View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4039180#4039180 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4039180