okay there are 2 things to do.
first, to stop getting new ones when you post make sure that you check what the notification type is, it should be do not subscribe if you don't wanna receive emails, its right below your reply. Also, in the emails, open one and at the bottom there should be a link to click to unsubscribe and that way you won't get any more from that tread, hope this helps.
feel free to PM me if you have any more questions.