code: def get_all_allowed_internal_commands(self):
          
          states = set()
          for command_name in self._get_all_commands(including_quit=True):
              if command_name not in ['GREET', 'MSGDATA']:
                  states.add(command_name)
          return states
docs: Returns an iterable which includes all allowed commands. This does
          not mean that a specific command from the result is executable right now
          in this session state (or that it can be executed at all in this
          connection).
  
          Please note that the returned values are /internal/ commands, not SMTP
          commands (use get_all_allowed_smtp_commands for that) so there will be
          'MAIL FROM' instead of 'MAIL'.