I mean, my thought is that if a high volume of spam causes other email servers to block Helm, then it makes it unusable to the good actors in the system. I didn't see the CEO address this.

Or, maybe I just misunderstand smtp idk

Yeah, that's how I understand the issue too. I don't think there's an easy way to do things, either you end up blocking some people with a legitimate use case or you end up becoming a spam farm.