Save Contact Form 7
Saves submitted form data to the WP database.
Save Contact Form 7 will save all your Contact Form 7 form submissions to the WordPress database.
It can be used to provide a record of all form submissions. It is very robust and will rarely fail to save a Contact Form 7 submit, even if the email is not sent due to a JavaScript Conflict or other email sending problem.
You can search and filter through your form entries and save your form data by exporting the form entries in popular formats like PDF and CSV.
Website – Save Contact Form 7