On Tue, 24 Apr 2007, Justin Mason wrote:
> However, in the meantime, it (like SPF) serves as a good way of
> *whitelisting* known senders.
Yes, SPF is /really/ useful for that:
http://www.techworld.com/security/news/index.cfm?NewsID=2154
Have SPF results drive some probabilistic filter, it at least stands
chance of figuring out that SPF-valid mail is /more/ likely to be
spam. Whitelisting SPF-valid is insane.
regards,
--
Paul "no magic bullet around email authentication" Jakma
paul at clubi.iepaul at jakma.org Key ID: 64A2FF6A
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