Sure.. But only if you add a new capability to the DNS server
to signal the SMTP server that this is occuring. Or install
a NIDS system that does the same. More infrastructure to
fix a broken system. Patches upon patches upon patches.
That is rhetoric, not an argument.
DNS has some problems, they have not been serious enough to fix till now but
the security community always understood how to fix them.
This is an IRTF working group. The expected outcome is either proposals to
change protocols or a statement why the problem is impossible, not
worthwhile or otherwise not to be addressed.
Phill
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