Paul Vixie sent a draft to the DNSEXT WG mailing list and again to ASRG when
it started.
The Vixie draft credits Jim Miller for the original idea.
--Jim Lyon <jimlyon(_at_)exchange(_dot_)microsoft(_dot_)com> wrote:
12. Acknowledgements
Variations on the idea of using a DNS record to check
the legitimacy
of an email address have occurred multiple times. The
earliest known
work is [RMX]; others include [SPF} and [CallerID].
The current document borrows heavily from each of the above, and
incorporates many ideas proposed by many members of the
MARID working
group.
I am not sure, but I seem to remember Andrew Church published
a draft for
MS records that predates RMX.
There was also a proposal by Paul Vixie but I don't know if it was
published.
--
Greg Connor <gconnor(_at_)nekodojo(_dot_)org>