Exclude Certain Email Domains from Membership Signup

In this recipe, we demonstrate how to exclude members from using specific email domains when signing up. It’s a useful recipe when you are trying to blocking disposable email accounts. This is an inverse recipe for a previous post that demonstrated how to require members to use one or more approved email domains.

The Code Recipe

Adding the Recipe to Your Website

You can add this recipe to your site by creating a custom plugin or using the Code Snippets plugin available for free in the WordPress repository. Read this companion article for step-by-step directions on either method.

Update the $invalid_domains array on line 62 to include the domains you want to block.