Ive seen others in this thread with the same problem and haven't found a solution yet.
I create a coupon including HTML message in 'coupon admin'. when I click the email button it offers 2 text boxes rather than the HTML message coupon I created. The name of the HTML coupon I created is in the first field but the text boxes are sample text "We're pleased to offer you a Store Coupon."
How do I send the HTML coupon I created?