2008/10/16 Victor Pascual Ávila victor.pascual.avila@gmail.com:
In addition, "404 Not Found" is not the correct reponse when the destination target is not registered, IMO it should be a 480 instead.
Yeah!!!
404 should be returned when the proxy/UAS received a request and it's not responsible for it, for example a non existing user (non existing user != non registered user). When a user is not registered, but it does exist in the server, the server must reply "480".