[Dshield] DNS MX record block question

Brian Dessent brian at dessent.net
Sat Sep 6 03:49:58 GMT 2003


Doug White wrote:
> 
> hotmail is one that receives on a bank of servers and sends on one that does not
> have an MX record.

I think everyone is misunderstanding.  No one is talking about checking
to see if the sending machine is a MX.  We're talking about checking the
envelope-from address to ensure that the listed domain has an MX record,
i.e. don't receive mail from 'foo at fsldkfgjsdjh.com' or any other
nonsense domain.  (This of course just motivates spammers to joe job
more often, but such is the modern internet.)

Brian




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