} Is there a reason why a legitimate MTA (talking to MXs, not submission
} servers) would want to hop around in its net?
Probably not, although I'm waiting for ESPs to figure out that if they
send every message from a different IP, it'll be much easier to
process bounces and complaints since all they'll need is the IP to
figure out what the list and address was.
Bad guys could use it to listwash, of course, but it's not totally
ridiculous.
R's,
John
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