page_notifications
This is a lightweight module that allows Anonymous users to subscribe to a page (node) and receive immediate emails which include notes or small message about any changes or modifications to that page (node) from the author of the page.
The notifications are sent out immediately when the corresponded checkbox checked on and the page (node) is saved.
Anonymous users can retrieve and manage their subscription on the website without having to create an account on the website. This allows easy manipulation of their records and not having the hassle to remember usernames or passwords.
New features like sending email in batches using cron, permissions, admin view of subscriptions will be implemented in the future versions via updates.
This module works with captcha and reCAPTCHA module (highly recommended to have in installed on your website).
It will detect recaptcha automatically once you install it and enable it.
Support Status
Actively maintained and open to accept help in making this more flexible module with extra features