Plugin Contact Form 7: How to fix the "This email address does not belong to the same domain as the site." problem?

The mentioned error always occurs when the VON address does not match the website domain. This is often the case if the content of the [your-email] field is entered in the FROM field.

Solution: Here also the address should be deposited, which is also indicated in the AN field. In order to have the correct recipient when replying to this e-mail and not to reply to yourself, you can enter the following in the Additional Headers: „Reply-To: [your-email]“.