On 15/Feb/10 19:38, Darxus(_at_)ChaosReigns(_dot_)com wrote:
Basically the entire thing is:
1) Receive an email from IP.
2) Get host name from PTR record value for IP.
/Any/ PTR, or should one test all of them? How about virtual servers?
3) Get value of A record named IPReversed.mtx.HostName.
4) If the value is 127.*.*.1: Pass. Otherwise: Fail.
Blacklisting, of course, is required. I believe maintaining a blacklist
of (non-throwaway) spammer domains using MTX (against the sending IP's
PTR record), and possibly IP's which spam with MTX, will be significantly
easier than maintaining current IP blacklists.
Why wouldn't spammers change domain as often as they wish? They
already register all the throwaway domains they like... I cannot see
why MTX would slow them down.
I believe the more this is adopted, the more spammers will be required to
own the transmitting IP *and* a throwaway domain.
Non-spammers will be required too, of course :-/
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