And are you also clearing the logs at your ISP? If not, you’re still being tracked. Even vpns are not as secure as people think they are. It’s all trackable at some level.

If you’re truly worried about that, turn the Internet off and never come back. What you are asking is impossible.

But if you only use that email account for authentication to the system and it’s not tied to you, they have no way of tying it back to you. It’s just an anonymous email address.

I agree. If you’re worried about it, set up a free gmail account to use for validation, problem solved.