On Tue, 2004-04-20 at 17:12, Bill Mcinnis wrote:
You're absolutely right that a spoofing system could slam a receiving
system with illegitimate emails, but that could happen in any embodiment.
Consider spoofing not from a single system, but tens of thousands of
systems. This is the problem as it exists today. There are methods for
providing individual mail validation but this is not part of the
charter. I see SPF as a possible solution, whereas your proposal fails
to address the basic issue.