Similar question as my sibling comments. I have rented a server with a static IP address for over ten years now. Nobody else has used this IP during this time. Yet, every few months I have to beg Microsoft to unblock the IP. In the beginning I could do this on my own, but something changed a few years ago and now I have to beg my ISP (netcup) instead to contact Microsoft on behalf of me to temporarily whitelist the domain. Then wait another 2-3 months and do the same dance again.
Why? Why can Microsoft not learn that an IP has been healthy and spam-free for 10+ years and only bother me when there is actual spam is being sent?
Why? Why can Microsoft not learn that an IP has been healthy and spam-free for 10+ years and only bother me when there is actual spam is being sent?