Fast Secure Contact Form: select-multiple menu not working in email from form

I’ve been using Fast Secure Contact Form by Mike Challis with excellent results. However, I’m having an issues with the select-multiple drop-down menu option. I can create the drop-down menu just fine and the multiple selection functionality works perfectly on my test site in my browser. The problem is when the form is filled out and sent to my email none of the selections in the select-multiple drop-down menu are showing up. The title of the drop down menu is showing up in the email but none of the selections I’ve made are working in the email from the contact form.

I’ve tested this issue in both outlook and gmail and nothing seems to be working. Does anybody have any ideas?
Thanks,
Dustin/dust9