[Solved]-How do I add "Reply To" to this in Django?

You’ll want to add a Reply-To header to the EmailMessage.

headers = {'Reply-To': reply_email}
msg = EmailMessage(subject, body, from_email, [to_email], headers=headers)
msg.content_subtype = "html"
msg.send()

As of Django 1.8 there is an argument that can be passed into the constructor of EmailMessage named reply_to that will handle the headers logic for you.