[RuggedMoose]

Is it possible to have an email notification go out to all existing forum members for each new topic, once that topic is approved by forum moderator?

[RuggedMoose]

Is it possible to have an email notification go out to all existing forum members for each new topic, once that topic is approved by forum moderator?

[Stephen Edgar]

This is not in the core of bbPress though there are a few email notification plugins you could have a look at https://bbpress.org/plugins/

I think it sounds like @jaredatch’s ‘New Topics Notifications’ is what you need though.
https://wordpress.org/extend/plugins/bbpress-new-topic-notifications/