Once you post a reply, look at it and you will see buttons lile
"Edit" "reply" "quote" ....
Click on "notify" that will do it
I'm on a hundred different forums lol. I did check out "notify", and it asks "reason you are notifying moderator about this post" . Seems more like a "report" button. I don't get email notifications about PMs even though I'm set up for that. Strange
Actually, I might have fixed it (Add this thread to Watched Topics). That should do it.