My guess would be after a while you'll start to see admins flip the switch to say "550 ERROR Need DMP Records".
I don't expect that point to ever arrive. Way too many false positives.
However, if DMP records ever became as prevalent and accepted as MX records, then we have achieved anti-forgery nirvana. What's great is there is no cost, no new DNS records, even no need for PTR records, no central authority or central registry.
Len
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