On Tue, 11 Aug 2026, Benoit Panizzon wrote:
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.
Well, only very stupid bots don't behave correctly and start sending
before they get the correct greeting.
Sure, and only very stupid bots don't retry. If greylisting works for
you, fine, but I've found greet pause is about as effective without having
to screw around with whitelists and SPF trying to figure out which new IPs
to skip or trying to match up retries from different IPs,
R's,
John
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