BuddyPress Ban Registration Domain

WordPress Ban Registration Domain bans user registration by domain, email address or domain extension. It works with WordPress, WordPress Multisite, BuddyPress and Ultimate Member.

Enter one pattern per line. Use domains such as example.com, extensions such as .info or .ru, or full email addresses. Two wildcard characters work. The asterisk matches anything, so *one.com matches siteone.com and exampleone.com. The question mark replaces a single character, so exa?ple.com matches example.com and exaple.com.

You set who is banned and the message a banned user sees from the plugin admin page, under Settings, Ban Registration Domain.