It appears that Al Iverson via mailop <aiver...@wombatmail.com> said: >What if we just got to the heart of the matter and admitted that >greylisting is useless 2023?
Because it's still quite useful if you do it sensibly. Here's what my logs say for the past two years, by number of IPs greylist but never retried: 13573 greylist and did retry: 9299 whitelisted or previously retried: 6519 More than half of the addresses I greylist never retry, and spot checks of the logs show that's overwhelmingly bots. I suspect that Sendgrid's problem is that they gush so much spam that mail systems have cranked the spam filters way up, so they run into delivery problems that better behaved mail systems don't have. I have a bunch of special rules that whitelist a modest set of known good return addresses and report most of the rest as spam to them, for what little good that does. R's, John _______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
