Denylist / Alowlist | Email Form Field

Create an option on the email form field to add a deny or allow list of emails that can be inputed.

For exemple, if I want to have only registered users from a specific domain (Ex: gmail.com) I should be able to add to the allow list “*@gmail.com” and only emails from that domain are allowed to be registered.

One of your competitors have that. You can check wpforms.