def recv_header_line(self, line):
        """All header lines (subject, date, mailer, ...) are processed here.
        """
        mline = "{0}{1}".format(line, CRLF)
        print("H>", line)
        self.remote.send(mline.encode())
All header lines (subject, date, mailer, ...) are processed here.
        
recipes/Python/577260_Multi_threaded_SMTP_proxy/recipe-577260.py