Looking for a plugin to restrict content with out the creation of users

Hello,

I am looking for something that might be slightly odd, but I would like to restrict access to a page (or a few pages) but the only thing a user would have to enter would be an email, no need for a password, just an email that is on the “list.”

The idea I had was to just use a form plugin, and have it redirect, but that only checks that the email is valid. I would like to check that the email is an approved email.