[noah-graff]

Is there a pluggin so that when someone responds to someone else’s question, the person who posted the question gets an email notification?

[chrishajer]

If you mark an item as a favorite, you can have an email notification sent when there’s a reply to one of your favorites.

Post Notification:

https://bbpress.org/plugins/topic/post-notification/

or

Subscribe to topic:

https://bbpress.org/plugins/topic/subscribe-to-topic/

[chrishajer]

Also, there’s this opposing view of allowing people to get email notification of replies to their topic:

https://bbpress.org/forums/topic/email-notifications#post-20324