So, let’s say you created a ProtonMail account entirely on your Tor Browser through the Tor mirror the entire time and then also signed up to SimpleLogin/AnonAddy to have an e-mail alias/cloak for each account that you have (for example, say you have make an Reddit account and you go and create an alias for the Reddit account and that alias will be used ONLY for that account and nothing else)
Would it be a bad idea to make aliases and use them for stuff tied to your personal identity (such as banks or stuff you’ve previously used payment options tied to your name etc) or it wouldn’t matter?
If you make an alias for each account there should be no trivial way to correlate them together.
But I think there’s a problem, making all the effort to go anonymous by signing up through Tor (and I assume using your email client always through Tor) would be kind of wasted because you gave a link all the information they need to tie everything back to you: the aliasing service which:
So you need to trust your aliasing service not to snoop on your emails