How can I restrict registrations to two domains?

Hello,

I am using vBulletin 3.6.5. Can someone teach me how I can modify one of the php scripts to restrict registration to two domain names? (e.g., domainA.com and domainB.com)

Previous posts on this topic contain solutions that are outdated and no longer work.

Thanks a lot!

Bump.

I am using https://vborg.vbsupport.ru/showthrea...t=registration as a temporary solution. But how can I, say, restrict certain forums to certain domains? For example, only people with @domainA.com can view Forums 1, 2, and 3. But all domains can view Forum 3, but not Forums 1-3. Thanks.