9091 was experimental, and the results of that experiment have been folded
into DMARCbis. This section of the document acknowledges that and formally
deprecates 9091:
https://www.ietf.org/archive/id/draft-ietf-dmarc-dmarcbis-28.html#name-policy-discovery-and-organi
Seth, as Chair, putting this
I reviewed the list of DMARC-publishing PSL entries and realized that the
10-fold increase in PSL DMARC participation was due to the success of RFC
9091. Private registries are deploying policies to protect their
sub-registry clients.
It is indeed unfortunate that concerns about PSL accuracy
