On Sat, May 9, 2015 at 10:33 PM, Anne Bennett <[email protected]> wrote:
> Hmm, Hector, I think you've forced me to convince myself that you're > on the right track: I think that the "registration problem" is a red > herring after all. There's no deterministic way to decide what's a > legitimate mailing list (or other re-signer), any more than there's any > way to deterministically decide what's a legitimate originator. Those > determinations are made heuristically outside DMARC. > I suppose the tl;dr version of my last reply is: The registration problem is not a red herring because it doesn't exist, but because it is intractable. Thus, any response to the third-party problem that relies on a solution to that problem (which includes ATPS, DSAP, and TPA) is probably not viable. -MSK
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