On Oct 17, 2006, at 2:16 PM, Scott Kitterman wrote:
Reuse of TXT in an underscored subdomain is benign.
Agreed. Also there would not be an advantage using a new RR type
when there is an association made using query labels as might be done
with designated domains, clients, or local-part policies.
For example:
<base32(sha1(some-element))>._some-policy.<some-domain>.
The use of policy discovery implies a desire to block non-compliant
messages, rather than a desire to annotate messages that are
compliant. The latter mode provides greater security without
requiring the search for policy records within parent domains.
-Doug
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