Add the checked domain to your CF7 form

[Powie]

If you would like to add the checked domain automatically to a contact form 7 generated form on your wp site, simple follow the cf7 instructins for fetching default values to form fields here:
https://contactform7.com/getting-default-values-from-the-context/\" rel=\"external nofollow\">https://contactform7.com/getting-default-values-from-the-context/
Then add a link with the get value to the box for the info an a free domain.
Example:

This domain is free.
- Register bestellen.