I'd appreciate it if someone at Microsoft could get both mail.grapheneos.org IPv4 addresses removed from the SNDS spam list:
51.161.8.140 (static IP of the server)
51.222.17.218 (newly assigned floating IP so we can avoid dealing with this in the future by moving it around)
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Yeah, this is the only real issue we've had with self-hosting mail. Their IP blacklisting never expires so it's permanent unless we can get someone to take a look at it. It also means that most recycled IPv4 addresses or even ranges we could obtain will have the same problem.