code: async def rcpt(self, recipient, options=None):
          
          if options is None:
              options = []
  
          to_addr = "TO:{}".format(quoteaddr(recipient))
          code, message = await self.do_cmd("RCPT", to_addr, *options)
  
          return code, message
docs: Sends a SMTP 'RCPT' command. - Indicates a recipient for the e-mail.
  
          For further details, please check out `RFC 5321 § 4.1.1.3`_ and
          `§ 3.3`_.
  
          Args:
              recipient (str): E-mail address of one recipient.
              options (list of str or None, optional): Additional options to send
                  along with the *RCPT* command.
  
          Raises:
              ConnectionResetError: If the connection with the server is
                  unexpectedely lost.
              SMTPCommandFailedError: If the RCPT command fails.
  
          Returns:
              (int, str): A (code, message) 2-tuple containing the server
                  response.
  
          .. _`RFC 5321 § 4.1.1.3`: https://tools.ietf.org/html/rfc5321#section-4.1.1.3
          .. _`§ 3.3`: https://tools.ietf.org/html/rfc5321#section-3.3