Answered question
It's a little annoying to be honest. Notifications should be built-in to the forum system, not spammed to my email. I'll randomly get emails for months old posts with new comments. I can't seem to find a way to turn them off completely, only to remember to uncheck the "follow this post" box when I comment on something or unfollowing manually later.
Other answers
I create a rule on my mail to move directly to a folder
At the bottom of the email you can unsubscride.
@Vincent, that's just to unfollow the post, not to stop receiving all emails from the community forum.
Unfortunately no. It has to be done by individual thread/post.
You're gonna need to make a special folder. I don't think that's a feature yet.
(edit: when you first make your post, you can uncheck the follow post button right under it)
That feature does not exist yet.