Here a quick guide on how to fix Contact Form 7 error messages.
Contact Form 7 has three error types:
- Yellow
- Orange
- Red
You can find the meaning of each error message below.
Yellow Error
A Yellow error tells you there is a form validation error.
Error Message:
"Misconfiguration leads to mail delivery failure or other troubles. Validate your contact forms now."
Solution:
- Go to your WordPress admin dashboard.
- Click on the "Contact Forms" button.
- Select on the "validate form now" button.

Orange Error
The orange error tells us that your form isn't sending because of spam issues.
Error Message:
"There was an error trying to send your message. Please try again later."
Solution:
- Go to the Contact Form 7 tab.
- Click on integration.
- Select "remove keys."
- Go to the Google ReCaptcha page.
- Sign in and create site keys for your website (choose reCaptcha V2).
- Add the new V2 site keys to Contact Form 7

Red Error
The red error tells us that your website hosting/server is blocking WordPress from CF7 sending emails.
Error:
"There was an error trying to send your message. Please try again later."
Solution:
- Install WP Mail SMTP or Mailgun plugin

Still not working?
Deactivate any caching plugins (WP-Rocket, W3TC etc...) on your website, re-test.
Gravity Forms
I strongly recommend using Gravity Forms instead of CF7; it has a better GUI, has more advanced features, and is easier to use.