You do realize that your stupid limitations based on disposable emails is useless right? We can just make real fake emails. Pathetic.
You seem to have the issue you have figured out, so you’re literally complaining for the sake of complaining.
Use a legitimate e-mail and you’re sorted, in the words of the Arnold Schwarzenegger soundboard “STOP WHINING!”.
Or Clint Eastwood: “Nag, Nag, Nag”!