Doug Otis opined:
That's a ton of extra work, for very little benefit (from an anti-
spam point of view.)
No. With there being so many bots, it is common to find a large domain
sending a fairly high level of spam. It would be helpful if there
were a means to mitigate spam from such a domain without blocking the
entire domain.
I agree, that would be extremely helpful -- but DKIM's i= won't give it
to us. (Unless you're assuming that these same botnet operators will
allow themselves to be corralled into a single identifer, which clearly
isn't the case.)
Scott Kitterman responded:
Then find a solution other than DOMAIN Keys Identified Mail for that
problem. A user level reputation system is going to be at least an
order
of magnitude harder than domain reputation and we really don't have
the
domain level problem figured out yet.
+1
--
J.D. Falk
Receiver Products
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