WordPress plugin · UsersWP family
UsersWP Restrict User Signups
Block unwanted usernames and email domains when users sign up on a UsersWP site.
Auto updates Unlimited sites Unlimited downloads No daily limits
About This Plugin
The Restrict User Signups add-on for UsersWP is your site gate-keeper. It stops undesired users from signing up to your website.
For usernames, you can disable spaces and restrict full-match and partial-match names from a comma-separated list. For email domains, one click restricts 3215 disposable email domains, the ones spammers use most. You can also block any other domain from a comma-separated list.
To limit registration to a university or company, accept signups only from a specified email domain. You can disable username restrictions and restrict only email domains, or the other way round.