RE: Alternate bookkeeping proposal (MVP)

> COMMENT: MX RRs could be used instead of PTR RRs; with the advantage
> 	that MX RRs can be sorted by priority. Some people have STRONG
> 	feelings about the use of MX RRs for other than the original
> 	intent. This would be somewhat mitigated because the use of
> 	MX RRs here would be in a different name space and the
> 	${*_PROVIDER*} names should never resolve to A (AAAA) RRs.

Not to mention the use of PTR records for anything but their original
intent, or A/AAAA records as DMP originally used, etc etc etc.  You're going
to get strong feelings there, too.

There's a spec for storing otherwise-undefined stuff in DNS - RFC 1464.
Check that out and see if it's suitable.

> Wildcard ``unauthorized'' records are not needed since the "provider
> delegation" supplies the ``implemented'' flag and the MTA must still
> check all the providers until an ``authorized'' hit is made.

Solves the wildcard problem.

Do you want access to an NT4 DNS server to try this out on?  This only
supports wildcards in MX records by default (can be turned on for everything
else through a Registry hack but I'd even like to avoid this.)

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