I stopped using greylisting decades ago, always lost legit mail using it John Devine
> On 10 Aug 2026, at 21:46, John Levine via mailop <[email protected]> wrote: > > It appears that Benoit Panizzon via mailop <[email protected]> said: >> You have to look at the goal of greylisting. The goal is to filter out >> unwanted traffic sent by drones / trojans without proper queuing. > > Right, so it only made sense to greylist hosts you've never seen before. > >> Because some sender do such strange things as using multiple sending ip >> addresses some consider a /24 IPv4 or /64 IPv6 to be the same sending >> IP. > > 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. > > R's, > John > _______________________________________________ > mailop mailing list > [email protected] > https://list.mailop.org/listinfo/mailop
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