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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No issues with any other providers because our server has never sent any spam and we've owned 51.161.8.140 for a while now. Microsoft's SNDS must have the IP blocks as a whole listed.
Standard contact form for getting this fixed hasn't worked. Not even an automated response.
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Should have assigned a floating IP earlier so we didn't end up in this situation when we migrated to a new server instance for the mail server.
Got the new IPs removed from other blacklists before switching to them but Microsoft's form for this doesn't appear to do anything...
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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.