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Re: Hotmail preparing to check SID with spf2.0/pra only?

2005-06-22 03:26:36
Hector Santos wrote:
The difference?

PRA required you to do a higher bandwidth payload transfer of 2 megs before
it can determine the result which was possible at the 2821.Mail from state
point before the wasteful 2 megs was needed.

You could (strictly, violating SMTP but hey...) determine the PRA
result after only the headers are transferred, and drop the TCP
connection at that point (and blacklist some combination of IP,
2821.Mail, 2821.Rcpt for the likely retry).

- Jeremy