We check ADSP every time we run DKIM and see the following policy
distribution:
97.98% "unknown" (including domains not explicitly publishing policy)
2% "discardable"
0.02% "all"
That's not surprising. Keep in mind that the design of ADSP means that
you're supposed to check mail that's not signed (or at least, without a
signature that matches the From: line.) In my much smaller sample, I see
discardable on mail from Paypal, and I could believe that Paypal is 2% of
the signed mail they check.
Regards,
John Levine, johnl(_at_)iecc(_dot_)com, Primary Perpetrator of "The Internet
for Dummies",
Please consider the environment before reading this e-mail. http://jl.ly
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