code: def handle_message(self, stanza):
          
          if stanza.subject:
              subject = u"Re: " + stanza.subject
          else:
              subject = None
          msg = Message(stanza_type = stanza.stanza_type,
                          from_jid = stanza.to_jid, to_jid = stanza.from_jid,
                          subject = subject, body = stanza.body,
                          thread = stanza.thread)
          return msg
docs: Echo every non-error ``<message/>`` stanza.
          
          Add "Re: " to subject, if any.