Can't create new account

Hi
My friend is trying to create an account but it keeps saying 'email address already in use' or 'this is not a valid email address'

What can we do to fix this??
what is the problem??

Please help

You need to have a gmail account, if it means its already in use, either use the account recovery feature or make another gmail.

it is a gmail account and he's never been on warmane before...

We even created a brand new gmail account and that also didnt work