I don't know, I'm just going from my gut feeling here. Like Eric, I don't have a script to measure this either.
I just ran a few quick greps on my own server's logs for today and found that out of 192 unique senders who were graylisted, 145 successfully delivered at least one message (76%). The number of rejections due to the DNS filters and local blacklists were 1218, successful deliveries were 190 (16%). On one of my customer's servers (configured very differently from mine), I see 2141 graylisted with 1618 successful (76%). DNS filters blocked 2039 but those senders somehow successfully delivered 1381 anyway (68%). Another server (with yet another configuration) shows 1560 graylisted with 1411 successes (90%). DNS filters blocked 5937 but those senders successfully delivered 4392 (74%). What does all that mean? I have no idea -- remember what Mark Twain said about statistics. I didn't do anything to match senders to recipients, check if the messages were actually spam, allow for frequent senders or mailing lists, check if the rejections came before or after the successes, etc. (For that matter, I'm not even completely sure my search commands were written correctly.) Also, since the DNS filters kick in before graylisting does, it's impossible to say how the graylisting percentage would change if I turned off all the DNS filters. Until those factors are accounted for, the numbers don't actually mean anything. Hopefully Eric's script will allow for all that (assuming he's writing one). :) -- Sam Clippinger On Jul 9, 2012, at 4:57 PM, BC wrote: > > > Then why am I not getting hammered with spam? Is it the > failed-reverse-lookup that is saving me? > > > On 7/9/2012 11:00 AM, spamdyke-users-requ...@spamdyke.org wrote: >> Overall, I suspect Eric suspects what I also believe -- graylisting isn't >> effective any more. > > > _______________________________________________ > spamdyke-users mailing list > spamdyke-users@spamdyke.org > http://www.spamdyke.org/mailman/listinfo/spamdyke-users _______________________________________________ spamdyke-users mailing list spamdyke-users@spamdyke.org http://www.spamdyke.org/mailman/listinfo/spamdyke-users
