Perform an MX record lookup.

ParametersnameDNS name to resolve. (type: str)
timeoutNumber of seconds after which to reissue the query. When the last timeout expires, the query is considered failed. (type: Sequence of int)
ReturnsA Deferred which fires with a three-tuple of lists of twisted.names.dns.RRHeader instances. The first element of the tuple gives answers. The second element of the tuple gives authorities. The third element of the tuple gives additional information. The Deferred may instead fail with one of the exceptions defined in twisted.names.error or with NotImplementedError. (type: Deferred)
API Documentation for Twisted, generated by pydoctor at 2017-09-23 19:45:03.