Just to add to the datapoints of services ‘gone bad’ — I suspect the story behind several of these episodes is that whoever actually knew how their systems worked left the organization, and whoever is left to take over is not actually up to the task, and bad things happen.
I’m fairly convinced that was what happened in this case from a few years back https://bsdly.blogspot.com/2017/08/twenty-plus-years-on-smtp-callbacks-are.html <https://bsdly.blogspot.com/2017/08/twenty-plus-years-on-smtp-callbacks-are.html>. It is anyway fairly clear that whoever did great labour in an effort to avoid actually answering questions did not have a clue how any of this actually works. Another frequent problem is that the list maintainers are not too transparent about the actual mechanisms of getting on or off the lists. I would advise that any listing service that does not clearly document inclusion criteria should not be trusted. I slant in the direction that inclusion criteria should be as simple as possible, but even complex ones should be documented to whatever detail feasible and available to the general public. Just as a random example, here is my inclusion criteria document — short and sweet — for my known spam sources list: https://www.bsdly.net/~peter/traplist_ethics.shtml <https://www.bsdly.net/~peter/traplist_ethics.shtml>. In addition, my system generates a few other blacklists, summarized in this blog post: https://bsdly.blogspot.com/2018/08/badness-enumerated-by-robots.html <https://bsdly.blogspot.com/2018/08/badness-enumerated-by-robots.html> I hope this is vaguely useful to one or more somebodies out there. All the best, Peter — Peter N. M. Hansteen, member of the first RFC 1149 implementation team http://bsdly.blogspot.com/ http://www.bsdly.net/ http://www.nuug.no/ "Remember to set the evil bit on all malicious network traffic" delilah spamd[29949]: 85.152.224.147: disconnected after 42673 seconds.
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