[Spambayes] Yahoo's "domain keys" and spam

[Ryan Malayter]

http://www.wired.com/news/business/0,1367,61495,00.html?tw=wn_bizhead_2

Will we want to have SpamBayes check these (since many SB users will
have no control over what happens at their ISP or corporate gateway) as
they become widespread?

Just as obviously, spammers will attempt to forge them as well (to fool
filters like the current SpamBayes that would just add a token verifying
the *presence* of a domain key entry in the header), or use
yet-to-be-revoked keys from domains obtained through fraudulent means. I
think some intelligence must be built into spambayes to handle these...