www.JoyRssMail.com provides the ability to subscribe to RSS updates by Email. The difference between it and other RSS email subscription services such as FeedBurner or feedsky is that it provides a rich API. Considering that many Web sites now have more than one RSS feed, JoyRssMail allows webmasters to customize RSS categories directly in the subscription code when the API interface is provided, and can manage all real-time subscriber details in the background, as well as classify all subscribers according to the subscription RSS category, and can view the subscription situation of subscribers in real time, such as whether users unsubscribe or not, and unsubscribe time. In addition, JoyRssMail adopts the latest STMP collaborative sending technology, and provides good sending support for all free emails at home and abroad, which greatly enhances the disposable and operability in RSS mail subscription.