Yes, Board-o is correct. Go to the "My Home" function and then go to the bottom of that page and click the edit button next to the header "Subscribe / Unsubscribe from receiving forum posts by email, change message notifications, etc. " and you can handle it there.
But, as Board-o pointed out, be careful. You may get a lot of email. AND, be careful, you will be pulled further in by the Dark Side....