On Fri, 14 Nov 2014 14:58:46 +0100 Reindl Harald <h.rei...@thelounge.net> wrote:
[David] > > I don't agree with that contention. Botnet operators have so many > > resources at their disposal that I doubt they care about or even > > notice any sort of delaying or tarpitting. [Harald] > they don't because they have not much time for a bot until it gets > blacklisted - i see a drop down from 50000 to 5000 attempts per day > after postscreen replaced a Barracuda appliance I see millions of attempts per day (we run a rather large mail relay) and it seems to be pretty much constant month after month, despite our use of greylisting. I agree that the combination of greylisting and RBLs has a synergistic effect; greylisting gives RBLs time to catch up. Regards, David.
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