WordPress emails the site administrator email address if any issues are found.

Most contact form plugins email like Contact Form 7 & Gravity Forms send contact form information to the site administrator email too.

To change your website’s site administrator email address, go to your website’s admin dashboard > Settings > General.

Enter your email next to Administration Email Address.

Click Save Changes at bottom.

Your website will email you asking you to confirm the change. Click on the confirmation link you receive (your email might go into your Spam/Junk folder) and now you’re done.