Subscribing and notifications
There are options to subscribe to forums and threads.

Subscribing to a forum will notify you by email when any new threads (topics) are posted in that forum. Each Forum page has a link above and below the thread list to "Subscribe to this forum".

To get email about new posts in a thread, you can subscribe to that thread. When viewing a thread, click the "Subscribe to this thread" link at the bottom left of the page at any time. If you are already subscribed, the link lets you unsubscribe instead.

When you post a new topic or reply to a topic, you also have the option to subscribe and be notified of any replies. Quick Reply does not have this option.

Note: you will only receive one email notification per thread, until you visit the forum again.