Though I often have questions about how that works in terms of managing your domain. I feel like I shouldn't have the account I manage my domains with tied to an email address at the domain that's under management. If my email provider disappears, I'm potentially locked out of the account I need to log into in order to change the MX records, right?
It's hard to avoi nd this chicken and egg situation.
I use fastmail and they allow you "alias" addresses. So even though my primary email is on my custom dimain e.g. myname@mydomain.com, Fastmail also gives me an alsia of myname@fastmail.com. That's the email I used to log in (to AWS) and manage my MX records.
If either Fastmail or AWS were to go rogue/broke, I like to think I would eventually be able to restore access to my domain even without email? Hope never to find out.
Usually itβs just username/account number and password plus TOTP 2FA. Depending on country (?) they also have your postal address on file and can send you a reset password by letter. And you can specify an alternative email address like your work address, or a free email account that you only use for that purpose. Or you acquire two domains at different registrars where you can mutually use an email address at the other domain.
