Yes. There is a gray bar close to the top of the page that should have the words: User CP, FAQ, Members List, Calendar, etc., etc.
Click on User CP. It should give you a control panel. Click on Edit Options under the settings & options list. That should bring up a page that gives you different options for different things. The one for email is called Default Thread Subscription Mode where it should have a drop-down menu where you can change it to whatever type of email notification you'd like.
Hope this helps.