How Can we get email notifications when a new topic, or comment is added to a conversation we join?
conversations = PMs
are you talking about discussions?
Comment on commented, I'm due to release a plugin. Where someone comments on a discussion you have commented on (but is not necessarily your own).
grep is your friend.
When someone ask question or post thread, we need to get email notifications on each, is this optional, like I want to get email notifications on each reaction to forum.
sorry that wasn't clear in you original question. Where does the 'conversations we join' fit in?