The ChangeNotifications product is a Zope plug-in product that work with existing Zope objects. Users can subscribe to a folder, and they will get notified by email of all changed objects under the folder. The system scans at fixed intervals, so all changes are bundled into one email.
Users can subscribe to the newsletter by filling out the mail and the mail format from a form linked from every page of the website. Once the user subscribes, he/she receives an e-mail with: