I am creating a small demo website for which I was creating a sign-up page, it needs to only allow valid email sign ups, the problem is, I cannot do whitelist then i would invalidate emails from people who use work kind of emails

Initially I thought of using some API to check if the email is valid and proceed with sign up for my website but I think it’s better if I have implemented it myself. Any idea how to do it? Whitelisting and blacklisting wouldn’t work as I could always miss some or need to keep updating this blacklist.

Any help is greatly appreciated. Thank you all.