The notify module allows users to subscribe to periodic emails which include all new or revised content and/or comments of specific content types, much like the daily news letters sent by some websites.
Even if this feature is not configured for normal site users, it can be a useful feature for an administrator of a site to receive notification of new content submissions and comment posts.
The notifications are sent out in batches (digest style) at a frequency determined by the administrator. The administrator also decides what content type(s) to send notifications about.
Ordinary users can turn notifications on and off, and also whether to receive just headlines, teasers, or complete nodes.
The port for Drupal 7 is actively maintained, and reported bugs for the Drupal 7 branch will be fixed in a timely manner. Bugs in the issue queue for the Drupal 6 branch will only be fixed if accompanied with a patch, after the patch has been reviewed and tested by the community. Older versions are no longer supported. Community support in the form of patches are very welcome for both Drupal 6 and Drupal 7 versions, and will be given priority. For QA, the project needs community support in the form of reviews of patches, development versions and releases.
The primary goal of the notify module is to remain a light-weight and simple alternative to the more comprehensive notification frameworks, (e.g.: Subscriptions/Notifications). This means that not all feature requests will be implemented, even if they are a good idea. Feature requests accompanied by patches are more likely to make it into a release.
The maintainer hopes that the community is willing to help out by answering & closing support requests.
This module provides similar functionality to several other contributed modules. There is a comparison of the notification modules on groups.drupal.org which may be helpful in deciding which one is right for you.
In addition to these modules, you are encouraged to also try out trigger and action modules which is part of Drupal 6 and 7 core, as possible alternatives. If you need more configurability than what is offered by this module, you should consider one of these alternative solutions.
Current maintainer can be hired for customizations and other Drupal services: