I don't ask for an individual email, you do what you have to, maybe I am the 4th person.
My emails come in on a different computer, so while I am on one Forum I may get a notification on the other Computer that I have received notification of a reply to PCA - normally it is about the current forum that I am monitoring.
You must have (unticked the box) chosen the option to not to receive email notifications if you don't get an email when someone posts to your thread. There is a little box at the bottom when you start a new Thread, it is ticked by default to notify you by email if someone responds to your Thread.
If you post in the wrong forum area your thread will be moved, and an email will be generated - at least it will if you haven't deselected the option to receive these update messages each time there's an addition to your thread.