I do this with a feedback option in one of my courses so that it sends to multiple individuals and has a default subject line. I use a RunJS on a button on the final page of the course with the following:
window.location.href = “mailto:<your email address>?subject=<subject for email>&cc=<person to CC>”;
If you use the JS above and copy/paste, you will need to update the quotation marks. You could even add initial body for the email using “&body=<some body text>” or a bcc “&bcc=<email address>”
The ? indicates the first parameter to add to the email and the & attaches each additional parameter.
Hope this helps!