E-mail notification on new topics/replies

I would like to get a e-mail notification when a topic is beeing replied to or a new topic is created.

In the package the .cs files are not included. if I had these I could implement the remaining logic or is there some other workaround.


This is a companion discussion topic for the original entry at https://our.umbraco.com/forum/17854-e-mail-notification-on-new-topicsreplies