Janos Ver

By default when you send any notification from your blog (including many of the plugins as well) sender is “WordPress” and the sender e-mail address is <a href="mailto:wordpress@yourdomain.com" rel="nofollow ugc">wordpress@yourdomain.com</a>. I wanted to have personalized sender name and e-mail address that is why I created this plugin. Then I added features to send out e-mail notifications about newly published posts to users who are interested either automatically (on publish) or manually.
This plugin will enable you to
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Replace default <a href="mailto:wordpress@yourdomain.com" rel="nofollow ugc">wordpress@yourdomain.com</a> to any e-mail address
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Replace default e-mail from “WordPress” name to anything you want
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Send e-mail notifications automatically/manually to all registered users about new public posts
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Easily customize notification e-mail subject and content templates
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Re-send e-mail notifications manually as well
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Send notifications about password protected posts as well (password will NOT be included in notification e-mail)
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If you have <a href="https://wordpress.org/plugins/wp-jv-post-reading-groups/" rel="ugc">WP JV Post Reading Groups plugin</a> installed then entitled users can receive notifications about new private posts as well
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Users can opt-out if they don’t want to receive e-mails (they can choose to get all/nothing)
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Bulk subscribe/unsubscribe users to/from e-mail notifications (go to Users->All Users and see bulk actions)
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Maintain e-mail log about sent e-mail notifications
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Translations
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Hungarian – Janos Ver (last updated for plugin v2.3.1)
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Serbian – Andrijana Nikolic (last updated for plugin v2.2)
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German – Matthias Siebler (last updated for plugin v2.3.1)
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</ul>

WP JV Custom Email Settings

THAT is what i need! So cool integrated. 
Thank you for this PlugIn. I love it.



Love it...

The author obviously thinks the issue mentioned by Sublines is not worth looking into. Therefor I'll have to give a 1 str so he can start noticing.
Everytime you update a post, the notification gets sent to all the subscribers AGAIN. If I decide to make 100 changes that day, the subscribrs will get 100 emails. Its just rediculous.
Also, lately, the sending doesnt work, so I dont think its compatible with my current WP installation 4.4.1



Emails get sent on every update of the post

Notify users about new posts published and customize your e-mail notification settings

Huda Toriq

CommentMailer is a WordPress plugin that generates and sends e-mail to your blog’s commenters to tell them that you 
have replied his/her comment on your blog’s comment system. It adds extra options on your blog’s comment form to select 
which commenters you are replying to. Submitting the reply comment will trigger the e-mail generation function thus 
send them automatically. You can customize your own notification e-mail or use the default one.

CommentMailer

Send automated email to your blog's commenters everytime you reply their comments on the blog's comment system.

WP JV Custom Email Settings vs CommentMailer