[TheDewster]

"Email addresses to ban
Email Ban Lists: You may ban certain email addresses from registering on your forums. To ban a specific email, type the full email address (as in, waldo@whereiswaldo.com). To ban all email addresses from certain domains, such as hotmail, simply type the domain name (as in hotmail.com)- that will prevent anyone using a hotmail address from registering. Put a space between each banned email."

I would like to know if the reverse of this can be done, so that only domains i put in will be able to register...

Thanks for the help.