def template(self, name):
        """
        Set an active template to use with our Postman.

        This changes the call signature of send.

        Arguments:
        - `name`: str

        Return: None
        Exceptions: None
        """
        self.plain, self.html = self._find_tpls(name)
        if not self.plain:
            self.plain = self._find_tpl(name)
        try:
            self.send = self._sendtpl
            yield
        finally:
            self.plain, self.html = None, None
            self.send = self._send
Set an active template to use with our Postman.

        This changes the call signature of send.

        Arguments:
        - `name`: str

        Return: None
        Exceptions: None