def markGood(self, mx):
        """Indicate a given mx host is back online.

        @type mx: C{str}
        @param mx: The hostname of the host which is up.
        """
        try:
            del self.badMXs[mx]
        except __HOLE__:
            pass
dataset/ETHPy150Open kuri65536/python-for-android/python-modules/twisted/twisted/mail/relaymanager.py/MXCalculator.markGood