Is there a way to prevent form submissions from using personal email addresses on Webflow to reduce spam, even with Recaptcha?

You can prevent form submissions using personal email addresses (e.g., Gmail, Yahoo) in Webflow by applying custom form validation with JavaScript. Webflow does not have built-in email domain restrictions, but you can achieve this by adding custom code to restrict specific domains.

1. Add a Custom JavaScript Snippet

• Go to Project Settings > Custom Code > Before tag.

• Insert the following JavaScript snippet inside <script> tags:

  ```javascript
  document.addEventListener("DOMContentLoaded", function () {
  const form = document.querySelector("form"); // Adjust if targeting a specific form
  if (!form) return;

  form.addEventListener("submit", function (event) {    const emailField = document.querySelector("input[type='email']");    if (!emailField) return;    const emailValue = emailField.value.toLowerCase();    const blockedDomains = ["gmail.com", "yahoo.com", "hotmail.com"];    const emailDomain = emailValue.split("@")[1];      if (blockedDomains.includes(emailDomain)) {        event.preventDefault();        alert("Please use a business email address instead of a personal one.");    }});

  });
  ```

2. Customize the Blocked Domains

• Modify the blockedDomains list to include any email providers you want to block.
• Example: Add "aol.com" or other unwanted domains.

3. Test the Form

• Publish your site and try submitting the form with a restricted email.
• A validation alert should appear, preventing submission.

4. Alternative Solution: Use Third-Party Form Processors

• Consider tools like Zapier, Make (formerly Integromat), or n8n to filter emails before storing submissions.
• Services like HubSpot, Mailchimp, or Typeform offer advanced validation options.

Summary

Since Webflow does not natively block personal email addresses, you must use JavaScript validation. Adding the above script ensures form submissions are blocked when using specific email domains, reducing spam effectively.