Please use a personal email. My email is ‘mail’ @ ‘my actual name’. It does not get more personal than that
But you can’t use emails starting with mail@, admin@, support@, info@, main@, etc.
Instead they advised me (3 times) to create a personal email on a service like Yahoo, Outlook, Gmail, Orange, etc
Had something similar happen with indiegala. Had an account with them for years, then one day, could not purchase some games randomly. Hit up their support and got the answer “Oh, the purchase was denied because your account’s email address is detected as a temporary email address”… The email address I’ve been using on that account… for years… Is temporary.