The email body is built from the associated file in WA_UniversalEmail/EmailTemplates/
You could add a recordset filtered by the coupon code session variable to look up the coupon name and display it.
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.