This is not an excuse for a lame SPF record.
I don't need an excuse for a "lame" MARID statement. I have a "lame" (or
"crooked") *policy* and I want to publish it.
Why do you want to stop me? What good does it do you?
These are not rhetorical questions :-)
My reply to the original prose was not rhetorical but a response
to a statement why people would want to enter 0/0 in such records.
Given, I have no control over what you enter in dns for your
domain, but I can control how I interpret some of those records
with or without more information (repudiation services, whitelists
or blacklists etc), this is in practice today without any standards
to support such behaviour.
I.e. I may choose to at all times to refuse mail where the MAIL FROM
contains a domain with a MARID record containing 0/0. I may also
choose to quarantine them for the purpose of contacting the admins
and ask why they have such a record and if I get a "lame" reply I
will probably blacklist it (or submit to a public blacklist).
But yes, I support not referencing sentiments in the RFC's...
Rgds,
-GSH