Stefano

This add-on plugin for bbPress will allow anonymous users to subscribe to topics and get email notifications when a new reply is posted. The notification email includes an unsubscribe link.
bbPress notifications will keep to go out to registered users, this plugin only extends the thing to anonymous posters as well!
See the project on <a href="https://github.com/TheCrowned/bbPress---Anonymous-Subscriptions" rel="nofollow ugc">GitHub</a>.
Available in English, Italian, German, Norwegian, Ebrew, Serbian.

bbPress – Anonymous Subscriptions

A simple plugin to allow anonymous bbPress users to subscribe to topics and get email notifications when a new reply is posted.

philippe

Adds an export emails page that allows you to export the email list of your subscribers and the email list of all the people who left comments. That way you can use a more sophisticated mailing list or autoresponder system to communicate with the people interested in your website.

Export emails

Adds an export emails page that allows you to export the email list of your subscribers and the email list of all the people who left comments.

bbPress – Anonymous Subscriptions vs Export emails