Keycloak - Whitelist email domain for registration

This extension allows you to validate email domain used for registration in keycloak to accept only a finite list of domain.

How to install

Simply drop the jar in $KEYCLOAK_HOME\standalone\deployments, it will be automatically deployed by keycloak.

How to use

• Go to the admin console, in authentication menu.
• Copy the registration flow
• add a new execution below "Profile Validation" and choose "Profile Validation With Email Domain Check"
• Configure this new execution (otherwise, keycloak will only accept "exemple.org" domains)
• Change the registration binding to this new flow
• Configure the realm to accept registration and verify email (this is important!)