The recommended data format for the email field to ensure that only a prospect's company email address with the format of ''[email protected]" is captured on their form is "Emails not from ISPs and free email providers". This option will validate that the email address entered by the prospect is not from a common internet service provider (ISP) or a free email provider, such as Gmail, Yahoo, or Hotmail. This option will help you filter out personal or invalid email addresses and capture more accurate and qualified leads