def push(self, code, msg=None):
if msg is None:<EOL><INDENT>msg = str(code)<EOL><DEDENT>else:<EOL><INDENT>msg = '<STR_LIT>' % (code, msg)<EOL><DEDENT>if not msg.endswith(self.LINE_TERMINATOR):<EOL><INDENT>msg += self.LINE_TERMINATOR<EOL><DEDENT>self._channel.write(msg)<EOL>
Send a message to the peer (using the correct SMTP line terminators
        (usually only called from the SMTPSession).