Naturally, moments after posting an update to the implementation report, some
other interesting data came to light. One of our project members decided to
start watching the DNS for what queries were hitting his nameservers after
turning up DNS signing. The result included queries for policy at some really
old locations, including _policy._domainkey.<domain> (one of the early SSP
locations, I believe) as well as _domainkey.<domain> (DomainKeys).
It might be interesting to determine how widespread these implementations are
even though they're very obsolete by now. If I can get some statistics about
this to include in the report, I'll do so for -04.
-MSK
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