On May 22, 2007, at 1:21 PM, Maxim Khitrov wrote:
Do you know if there is a reason they chose to do it this way?
Accept the
connection, but don't allow the client to do anything with it?
There is some advantage to getting enough info from attempted spam to
produce useful logging messages, even if you want your mail system to
eventually return a 5xx permanent failure.
Some people also find that accepting and tying up spammer connections
can help reduce the rate that spam gets pumped out, although for that
to be really effective, it helps to have a "teergrube" (German for
"tarpit") in your MX list which is specially designed to very slowly
accept traffic from potential spammers without tying down a lot of
your own bandwidth.
--
-Chuck
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