this extension enables you to send your articles to users of your website via e-mail automatically. when you create or save an article, e-mails will send automatically to users.
also you can determine some filters to control sending e-mails:
-filter for articles
-filter for categories
-filter for usergroup
-filter for users
Notice:for users that you like to receive e-mail,please change "Receive System E-mails" state to "Yes".