Since Drupal uses a dynamically generated feed, that isnâ€™t so easy. I figured out a simple work-around with a small patch to node.php. My patch creates a private feed URL and redirects /node/feed to the FeedBurner feed. Hereâ€™s how to do it:
Entering a promotion code is not required. The promotion applies to a certain product. The promotion is available to all shop customers. The promotion is available without any restrictions on the amount of the order.