>- move all the broken signature reporting into the signature itself by making 
>them
>extension DKIM-Signature tags, rather than putting them in the key records in 
>the
>DNS; the revised design doesn't require DNS queries for failed signatures that
>don't otherwise need them

Let's say I put this line in the header of a bazillion messages in a
spam run:

DKIM-Signature: v=1; d=blackops.org; s=bogus; b=foo; bh=bar; h=baz; r=murray;

I've just indirectly mailbombed you.  Oops.  The domain has to publish
something about its willingness to get reports, not unlike the way that
ADSP publishes a record about what to do if there's no signature that matches
the From: domains.  Perhaps something like this:

_report._domainkey.blackops.org TXT "r=sendreportshere"

It doesn't belong in the key record since, among other things, that
would make it hard to debug failures due to missing or malformed key
records.

R's,
John

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