On Tue, 27 Apr 2021 19:42:22 -0700 (PDT) John Hardin wrote: > IIRC the Hostkarma list is fed by people pointing a backup MX DNS > host record at *their* MTAs so that they can analyze the traffic and > harvest the spammers doing "use backup MX to avoid filtering on the > primary MX". I clearly recall being surprised that Marc assumed > people would be willing to do that with their email.
I don't think that had anything to do with the whitelist.
