For what it's worth, I managed to get whitelisted by Microsoft a few months ago after... 15 years of undeliverability or so. I followed the process, and then k

For what it's worth, I managed to get whitelisted by Microsoft a few months ago after... 15 years of undeliverability or so. I followed the process, and then kept insisting a bit by answering the emails saying they were not going to do anything and I had to check if I was complying with their rules etc. After two emails I had a real person answer me, and a few more emails later (basically insisting I was already enrolled in their various bullshit spam reduction programs and there was zero spam problem with my domain) I got told that I had been whitelisted.