Leniy

You can easily send subscription,notification,newsletter,etc by email to your comments users under one post. 
方便给某篇文章的评论用户发送订阅、通知等邮件。
DEMO:<a href="http://blog.leniy.org/mail-to-all.html" title="示例页面" rel="nofollow ugc">Leniy</a> 
<a href="https://www.paypal.com/cgi-bin/webscr?cmd=_donations&business=HAENMLDR2UMFJ&lc=US&item_name=Leniy%20Plugins%20Donation&item_number=plugin%2ddonate&currency_code=USD&bn=PP%2dDonationsBF%3abtn_donate_SM%2egif%3aNonHosted" rel="nofollow ugc">Donate link</a>

Mail To All

You can easily send subscription,notification,newsletter,etc by email to your comments users under one post.

FolioVision

This plugin is obsolete. For comment subscriptions we recommend <a href="http://www.satollo.net/plugins/comment-plus" rel="nofollow ugc">Comment Plus</a> plugin. If you are interested in migration of your subscribers from Subscribe to Comments Reloaded into <a href="http://www.satollo.net/plugins/comment-plus" rel="nofollow ugc">Comment Plus</a> please <a href="https://foliovision.com/about/contact" rel="nofollow ugc">contact us</a>.
Subscribe to Comments Reloaded is a powerful plugin which allows users to subscribe to new comments on your blog posts. However if a person want to unsubscribe, they have to click the “Manage your subscriptions” link in the notification email. That opens a custom subscription management page on your blog, where they have to select the posts they wish to be unsubscribed from, then select the “Action” (Delete, Suspend, etc.) and then click “Update”.
What should be quick and easy is a multi-step process.
This plugin unsubscribes the person right away from the post for which the notification was received and adds a “You are now unsubscribed from {post title}” visual notification about that to the above management page. That is a single click to unsubscribe. But they can still use the subscription management page to adjust other subscriptions.
Update March 2015: SendGrid bounce processing added! If you use WP Mail SMTP or Mailer plugins, we detect the SendGrid login and then check for bounces in a WP cron. Bounced emails get unsubscribed from comment notifications.
<a href="http://foliovision.com/support/subscribe-to-comments-reloaded-better-unsubscribe" rel="nofollow ugc">Support</a> | 
<a href="http://foliovision.com/wordpress/plugins/subscribe-to-comments-reloaded-better-unsubscribe/changelog" rel="nofollow ugc">Change Log</a> | 
<a href="http://foliovision.com/wordpress/plugins/subscribe-to-comments-reloaded-better-unsubscribe/installation" rel="nofollow ugc">Installation</a>| 
<a href="http://foliovision.com/wordpress/plugins/subscribe-to-comments-reloaded-better-unsubscribe/faq" rel="nofollow ugc">FAQ</a>

Subscribe to Comments Reloaded Better Unsubscribe

Unsubscribing from comment notifications is not quick and easy enough in Subscribe to Comments Reloaded. This addon plugin fixes that.

Mail To All vs Subscribe to Comments Reloaded Better Unsubscribe