Reflection attacks? How would a few TXT queries make that happen?
It would be the queries themselves I would be worried about. Suppose someone
blasts a message to thousands of domains that has many addresses in the From:
line. All of sudden all of those domains are under attack.
Considering all of the other ways that an e-mail message can provoke DNS
queries, this doesn't strike me as a particularly worrisome issue. How is
this any different from a bad guy who puts a bunch of fake DKIM signatures
on the message?
R's,
John
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