In your ACP go to vBOptions > vBOptions > User Banning Options > Banned email addresses
You can add the server in here by entering it in the form of @hotmail.com or whatever he is using.
Be aware that this will stop all registrations from this email domain.
You will probably want to make sure that the option Allow Users To Keep Banned email addresses is set to YES so that it doesn't affect any of your existing users.
|