Send a multi-message to the peer (using the correct SMTP line
        terminators (usually only called from the SMTPSession).

def multiline_push(self, code, lines):
        """Send a multi-message to the peer (using the correct SMTP line
        terminators (usually only called from the SMTPSession)."""
        for line in lines[:-1]:
            answer = '%s-%s' % (code, line)
            self.push(answer)
        self.push(code, lines[-1])