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I don’t think the SPF / DKIM / DMARC stuff is overly complex nor the core of the problem.
It’s not the core of the issue, but the average joe that is a hobbyist self-hoster it will be.
IMO, the core issue is that there is no standard whatsoever. People just do whatever the hell they want with these records, pretty much. Microsoft and Google do it differently than each other, even.
The only solution for me is that we move on from email as a society.
oh shit, I did not even consider that could happen. I uh… need to go tear down an instance I don’t really use anymore.