If you post a new thread, you can be notified by email when someone replies to that thread, or you can get an email notice of a new post in a thread by clicking the 'Subscribe to this thread' link displayed in the thread page.
If you decide you want to to stop receiving email notifications from a particular thread, you can just turn the option off by UNsubscribing from that thread.
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Life is just a chance to grow a soul.
What happens when you "subscribe" to a thread?
Threaded Mode