Email notification on Thread replies/new Threads
This includes Threads you have started and Threads you have replied to.
In order to receive Email notifications you have two choices:
1. to receive notifications for all Threads you start or post a reply to, specify Email notifications in General Settings/Messaging and Notification/Default Thread Subscription Mode. Use the drop down menu to specify how to be notified
2. to receive notifications on only a few choice ones, you must Subscribe to the Thread by using Thread Tools at the top/beginning of the thread and then specify what type of notification you want from the menu that pops up there.