Why is my Webflow email form giving an error message for a valid email address input?

Your Webflow form may display an error for a seemingly valid email due to several possible configuration or validation issues.

1. Check Email Input Validation

• Webflow automatically applies basic HTML5 email validation to email fields.
• The email must have the correct format (e.g., name@example.com). Webflow uses the browser's native validation in most cases.
• Invalid characters, extra spaces, or missing "@" or "." can trigger errors, even if the email looks almost correct.

2. Confirm Custom Validation Settings

• Click on the email field in your Webflow Designer and check the Element Settings panel.
• If you've added a custom pattern (Regular Expression), it may be too restrictive.
• Solution: Remove or adjust the custom pattern to allow standard formats.

3. Look for Flow Conflicts in Custom Code

• Custom code (like JavaScript that handles validation or submission) may interfere with how Webflow processes the form.
• Disable or comment out any custom scripts temporarily to test if they’re the cause.

4. Browser Autofill or Copy-Paste Issues

• Some browsers may autofill emails with hidden characters or trailing spaces.
• Ensure the form input is trimmed correctly before submission. Webflow doesn't do this automatically.
• Solution: Add JavaScript to trim inputs on submit, or manually test without autofill.

5. Check for Form Block or Integration Issues

• If your form is connected to a third-party tool (like Zapier or Mailchimp via custom code or Webflow Logic), a backend validation rule might be rejecting the email.
• Review the service’s incoming data rules and logs.

6. Test Publishing and Live Page

• Webflow validation behaves properly only on the published site. It may not work correctly in preview mode.
• Always test the form on your live site URL to verify error behavior.

Summary

Your Webflow email form likely rejects valid inputs due to overly strict validation (like a regex pattern), browser autofill quirks, or conflicts with custom code or integrations. Test on the live site, review input settings, and trim any whitespace or special characters before submit.