Dumitru Ciobarcianu wrote:
On Wed, 2006-12-13 at 01:50 +0200, Matti Aarnio wrote:
I do already see spammers smart enough to retry addresses from
the zombie machine, but that share is now below 10% of all emails.
My prediction for next 200 days is that most spammers get the clue,
but it gives us perhaps 3 months of less leaked junk.
IMHO this is only an step in an "arms race".
What you will do in three months, remove this check because it will
prove useless since the spammers will also retry ? If yes, why install
it in the first place ?
spammers are already re-trying; but they give up after 10 minutes.
As the delay time increases, the chances of getting on a blacklist
increase, which makes it easier to identify a machine as a spamming bot.
I normally let my greyfilters run at 30 minutes deny, and 72hrs of
lease time on a IP/To/From tuplet. This setting seams to be pretty
effective in dropping spam; at one point, upto 10k spam vs. a couple
hundred ham messages.
thomsa
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