> From: Andrew Newton <andy@xxxxxx> > On May 24, 2004, at 1:49 PM, Valdis.Kletnieks@xxxxxx wrote: > > > > In fact, there isn't any sane way to detect "inconsistent" header > > information > > without external hints - this is the reason why there's the SPF > > proposal, the > > Yahoo domain-keys proposal, and Microsoft's proposal. > > And MARID. I don't see any of those proposals and their competitors as sane. Some of them, such as SPF, do not even meet their own design goals as stated informally by their advocates. Others such as domain-keys do not seem to do anything that is not already done by SMTP-TLS, despite the goals in the I-D that seem to be closer to S/MIME. None of them have much to do with spam, but only with a currently popular mode of attack used by spammers. None have any hope of affecting even that particular attack mode for years, because none can have any significant effect until deployed on most SMTP clients. Many seem to be based on insufficient familiarity with the nature of SMTP (e.g. SPF's incredible source-routing scheme) and the urge to Do Something Now regardless of actual results. Vernon Schryver vjs@xxxxxxxxxxxx _______________________________________________ Ietf@xxxxxxxx https://www1.ietf.org/mailman/listinfo/ietf