Hi Beth,
I'm about to dive into this as well.Here is information taken from the v8.0 Highlights about this.
Hope it helps!
Emailing Order AcknowledgementsIt is possible to have html order acknowledgments emailed from the application. Email order acknowledgments may be requested manually in the application. The instructions for setting up the email acknowledgement system and formats are outlined in the v8.0 Upgrade Instructions , and details of the template setup and application components are detailed in Appendix D of the Web API documentation.