Checking the email before create a user

[antonio.filgueira]

So, my problem is that I want check the email address before a create a user. I using a simple sign up form and using a plugin from bubble to validate email.
but with a wrong email (like xpro@zzzz.com is a right email format but do not exist) I cant stop the bubble insert the user.
I want insert a validation before the action insert user. Is it possible?

thanks.

[deadpoetnsp]

You can send a random code to the user and ask them to confirm the code in an input