t.m.r.MXCalculator : class documentation

A utility for looking up mail exchange hosts and tracking whether they are working or not.

Instance Variable	clock	`IReactorTime` provider which will be used to decide when to retry mail exchanges which have not been working.
Method	__init__	Undocumented
Method	markBad	Indicate a given mx host is not currently functioning.
Method	markGood	Indicate a given mx host is back online.
Method	getMX	Find an MX record for the given domain.
Method	_filterRecords	Convert a DNS response (a three-tuple of lists of RRHeaders) into a mapping from record names to lists of corresponding record payloads.
Method	_cbMX	Try to find the MX host from the given DNS information.
Method	_ebMX	Undocumented

clock =

IReactorTime provider which will be used to decide when to retry mail exchanges which have not been working.

def __init__(self, resolver=None, clock=None): (source)

Undocumented

def markBad(self, mx): (source)

Indicate a given mx host is not currently functioning.

Parameters mx The hostname of the host which is down. (type: str)

def markGood(self, mx): (source)

Indicate a given mx host is back online.

Parameters mx The hostname of the host which is up. (type: str)

def getMX(self, domain, maximumCanonicalChainLength=3): (source)

Find an MX record for the given domain.

Parameters	domain	The domain name for which to look up an MX record. (type: `str`)
	maximumCanonicalChainLength	The maximum number of unique CNAME records to follow while looking up the MX record. (type: `int`)
Returns	A `Deferred` which is called back with a string giving the name in the found MX record or which is errbacked if no MX record can be found.

def _filterRecords(self, records): (source)

Convert a DNS response (a three-tuple of lists of RRHeaders) into a mapping from record names to lists of corresponding record payloads.

def _cbMX(self, answers, domain, cnamesLeft): (source)

Try to find the MX host from the given DNS information.

This will attempt to resolve CNAME results. It can recognize loops and will give up on non-cyclic chains after a specified number of lookups.

def _ebMX(self, failure, domain): (source)

Undocumented

API Documentation for Twisted, generated by pydoctor at 2013-04-03 11:20:05.