I think this is the biggest problem. If there are a lot of bad actors, you drag down the whole system, but if you try to prevent bad actors you run into a lot of issues.
A hard problem, and I don't envy anyone trying to solve it.
A hard problem, and I don't envy anyone trying to solve it.
Secondly, I think you underestimate the time intensive work that goes into clearing up an IP. I've run mail servers with users in the thousands. It's basically a full time job to keep a single ip clean. And that's with a half or less percentage of clueless users. I'm unsure how this will scale to hundreds of IPs let alone the thousands(x100) that would probably be needed to make creating your own hardware profitable.
Third, you're going to need to reach incompetent customers to make this profitable.
EDIT: Just realized I responded to the wrong person :(
Or, maybe I just misunderstand smtp idk