You are automatically subscribed to any board or forum that you post on, “like” a post on, or post a response to. You can turn on or off reply notifications on any board within the board itself where it says “Turn reply notifications on.” You can also manage which boards you get notifications from within your discussion board account by visiting your settings and selecting the “Subscriptions” tab in the middle and removing and saving any subscriptions you no longer want to receive notifications for.