How can you validate an email address upon submission in Form Builder?

Validating an email address upon submission in Form Builder fundamentally involves ensuring that the input adheres to a specific format that defines a valid email address, such as the presence of an '@' symbol and a domain name. By selecting a specific data format for validation, you enforce rules that help in distinguishing proper email addresses from invalid ones. This method can help reduce the incidence of typographical errors and ensure that users submit correctly structured email addresses that are more likely to be deliverable.

The other options, while they may enhance the overall quality of the form submissions, do not directly address the fundamental task of email validation. Utilizing a third-party email validation service can be beneficial for additional checks beyond mere format validation, but it involves an external dependency. Limiting submissions to corporate email addresses narrows the scope of valid submissions rather than verifying the format. Using a CAPTCHA helps in preventing automated submissions but does not validate the email itself. Hence, selecting a specific data format is the most direct and relevant method for validating email addresses in the context of Form Builder.