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
A lot of valid email addresses are obvious typos. steve@gmail is perfectly valid but useless in most web forms, for instance. A lot of websites drop technical compliance for the convenience of people who don’t know how email works.
Technical compliance can also become rather annoying when you start doing things like escaping characters in quoted strings or include spaces. Practically nobody is using any of that stuff in the real life, so you rarely ever need full compliance.
I don’t know why single character email addresses would fail that test, though.
Could be that they get a huge amounts of bounces from those kinds of addresses. I’m sure at least half of Germany is using
a@bc.deas the go-to “I don’t wanna give out my email” address.