Need Email extention block feature

We need email extention block for those website from where users can create temprory email for the login free plans. BY this way they can create multiple accounts and with this they can create problems by using free plans from each account. To solve this issue we need an option where we can block particular email website extention. Or we can allow certail email as whitelist email domain only. (but with whitelist domain there might be problem if the user will join from their business email) So i will request provide both or advance feature for this thing.