Is there some kind of process (other than posting here on the forums) that we can go through in order to notify Zoho when this happens? I believe this particular blacklist requires the server's owner to delist it, so it's not something that I can do myself.

I'll include some screenshots/links below as evidence:

https://mxtoolbox.com/SuperTool.aspx?action=blacklist%3a135.84.81.22&run=toolpage