I wish it allowed you to supply an email “formula” (for example “apple-sign-ups-${supplied-unique-id}@my-domain”). I understand this is a particularly “pro” req

I wish it allowed you to supply an email “formula” (for example “apple-sign-ups-${supplied-unique-id}@my-domain”). I understand this is a particularly “pro” request, but I’d still like it. Again, from a customer angle I’m not 100% sold on this. I don’t want to miss an email because Apple servers are down, and if Apple decides to kill an app I don’t like, I also want the ability to disagree. Separately, I want something that wouldn’t be a pain to use on non-Apple devices.