Am 27.11.25 um 01:01 schrieb Kyrian (List) via mailop:
How do other folks on the list balance out this conflict in their systems?
My experience with greylisting is that it blocks so little spam that it's not
worth the nuisance of delaying mails.
Manual blocklisting with some unusual filtering mechanisms (such as triggering based on the MX or NS records of sender
and Reply-To domains) is what keeps most spam out of the systems that I manage.
DNSBLs may achieve good results as well, but in my experience they only begin to list spam sources when the spam run has
been gogin on for some time, which is pretty useless for me. Unless I'm sleeping, my reaction time is normally quite a
bit faster, and I do not hesitate to block whole network ranges and AS numbers that I consider badly managed. Of course,
we get a few false positives, but we have ways to handle them.
Cheers,
Hans-Martin
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