Chris Baltazar

Easy to setup and get the ball rolling, you just need to fill out the common email config fields as any other webmail client
Works also for private providers like AWS SES 
After that you can just select the desired evens to be notified about and that’s it
Manage everything from a single and very dynamic admin screen in your dashboard and get the plugin working just in a few minutes
Just install it and then do directly into Settings / WP Simple Notify to see all the options. Enjoy it!

WP Simple Notify

It's very easy to setup and make it work, you can also make a test for your configuration and goes smoothly with all comment notifications

Super simple and efficient

Easiest WP Plugin to manage email notifications for common events such as user's post comments.

Jennifer M. Dodd

bbPress Email Notifications provides users with various email notifications relating to forum changes, as well 
as the ability to turn these notifications off. It overrides the bbPress-provided ‘Subscribe’ function, 
allowing users to turn all subscribed topic notifications off and on in one location.
BuddyPress users can update their bbPress email preferences at Member > Settings > Notifications. WordPress 
users can update their preferences at Users > Your Profile.
This plugin deals solely with bbPress plugin forums, and not with BuddyPress group forums.
Filters are available for modification of plugin behavior.
<h3>Credits</h3>
Development funded, in part, by Ariel Meadow Stallings and the Offbeat Empire.

bbPress Email Notifications

Provide notification emails and controls for bbPress subscriptions, merge, and split functions.

WP Simple Notify vs bbPress Email Notifications