[conspire] (forw) [sorbs.net #212641] [Webform] SORBS registration systems sends RFC-ignorant mail
ruben at mrbrklyn.com
Mon Oct 27 14:33:41 PDT 2008
Rick Moen wrote:
> Quoting Ruben Safir (ruben at mrbrklyn.com):
>> But you can't reverse DNS check if the sending machine is behind a
>> firewall/port forwarding or their dns name myhost.yahoo.com isn't an
>> official host of yahoo.com
How are you going to check the user if you can't reach the machine?
> There _is no RFC requirement_ that MTA hosts have valid reverse DNS.
> Some people elect to refuse mail from MTAs whose host lack reverse DNS,
> (apparently as some sort of misguided antispam heuristic), but I don't.
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