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Well, only if you want it! The real time email verification API is just a query function. It returns the status of an email address for you. So, the registration form behavior is up to you. There are those who will prefer to prevent the continuity of the registration until a valid email address is typed and those who will prefer not to prevent. The choice is always yours.
If you are using the Javascript Widget (our standard API), when you create a new source it is possible to choose which behavior you prefer: to block the submit function in case of invalid (or harmful) email addresses or not.
For more information about the API, click here.
This post is also available in: Português