It appears that Scott Techlist via mailop <[email protected]> said: >>That helps but even though I think I invented greylisting about 20 >>years ago, I don't do it any more. A five second greet pause to newly >>seen sending IPs seems to catch about the same set of bots without >>the annoying delays and lost mail. > >John, maybe I should ask on the Postfix list but sicne you mentioned it; this >doesn't cause issues with "real" servers who don’t wait >to talk then?
As far as I know, there's no such thing. Real servers all wait for the greeting. Anything that doesn't is a spambot. Will they retry and pass next time? I see postscreen has the postscreen_greet_wait = 5s option, that I'm not using. Spambots don't retry, real servers wait so they don't have to retry. R's, John _______________________________________________ mailop mailing list [email protected] https://list.mailop.org/listinfo/mailop
