code: def _dispatch_commands(self, from_state, to_state, smtp_command):
          
          #print from_state, ' -> ', to_state, ':', smtp_command
          name_handler_method = 'smtp_%s' % smtp_command.lower().replace(' ', '_')
          try:
              handler_method = getattr(self, name_handler_method)
          except AttributeError:
              # base_msg = 'No handler for %s though transition is defined (no method %s)'
              # print base_msg % (smtp_command, name_handler_method)
              self.reply(451, 'Temporary Local Problem: Please come back later')
          else:
              # Don't catch InvalidDataError here - else the state would be moved
              # forward. Instead the handle_input will catch it and send out the
              # appropriate reply.
              handler_method()
docs: This method dispatches a SMTP command to the appropriate handler
          method. It is called after a new command was received and a valid
          transition was found.