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Setting up email subscriptions and notifications in Drupal 7
Drupal Level: Beginner-Intermediate
Email notifications are the glitter of community sites: very few people passionately like them, but you'll never get rid of them. Probably the most typical use case on a Drupal site is to send an email notification to let a node's author know that someone's commented on their node. I just spent the good part of an afternoon setting this up on a Drupal 7 site, and thought I'd pass along some time saving tips.
