I would suggest an add-on to add restrictions on email address and batch update current users.
- Rebuild cache for built-in banned emails option
Change user account state to Email invalid (bounced) if user email contain banned domain or extension. For example, if *@10minutemail.com banned domain, we can change user account state for all current users who use @10minutemail.com through rebuild cache.
- Restrict domain name or domain extension
- Rebuild cache for email restriction option