Hi Sarah,
Our newest app - Thank You Video - has emails triggered based on customer purchase.
The result is not your regular marketing email, but a Personalized Video - which is created on the spot after a customer orders something from your shop.
The app is currently offered free as a launch promotion - feel free to check it out at no cost. The near roadmap includes more types of email triggers, newsletters and integration with mailchimp.
Here's an example:
Let me know if oyu have any questions.
Tal
Dynavi