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
If it’s exactly stuff like “mail@”, many mail systems will redirect stuff with a plus suffix to your main mailbox, like “mail+changeorg@”. That might be okay.
The image says they also exclude + and -.