On Sun, 1 Jun 2025, John Curran wrote:
Out of curiosity, is there a reasonably clear document somewhere that describes
how such network-level block
lists should be operated from the view of network operators; i.e., a “best
practice” statement ...
Sort of. See RFC 6471, Overview of Best Email DNS-Based List (DNSBL)
Operational Practices.
Running a useful blocklist is very hard. Everyone who's listed insists
that it's a mistake. Sometimes they have odd ideas of their
responsibility ("we have no control over the customer, we just take their
money and route their packets".) Sometimes they are sure they are special
so the regular rules don't apply. Sometimes they are confused. Often
they just lie. Occasionally, there really is a mistake but recoginizing
it in the noise is not easy.
Regards,
John Levine, [email protected], Primary Perpetrator of "The Internet for Dummies",
Please consider the environment before reading this e-mail. https://jl.ly
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