Javascript Rule-Based Authentication

Check if user email domain matches configured domain

What does it do?

This rule checks if the user's login email matches any domains configured in an enterprise connection. If there are no matches, the login is denied. But, if there are no domains configured it will allow access.

Use this rule to only allow users from specific email domains to login.

For example, ExampleCo has setup as a managed domain. They add to the email domains list in their SAML connection. Now, only users with an email ending with (and not can login via SAML.

How do I use it?

Just create a new rule in the Auth0 dashboard, and copy the following code replacing the placeholders with the appropriate values.

What is Rule-Based Authentication?

A rule is arbitrary JavaScript code that can be used to extend Auth0s default behavior when authenticating a user. Enabled rules will be executed in the order shown below for all users and applications as the final step of the authentication process.

Rules can be used to enrich and transform the user profile, deny access to specific users under certain conditions, retrieve information from external services and much more. For more information about rules, please check the documentation