sending a form letter by email

I would like to ad to my WIX web site email addresses that when clicked by the user would open the users email with an email with a pre-populated “subject” line as well as a paragraph in the body of the email. The paragraph in the email could be changed by the user to suit. All the user would have to do is hit “send” and the email would go off. Any thoughts on how to do this? Any help appreciated. thanks Gary, Anza, CA