Go to your user cp>edit options>Default Thread Subscription>change to "do not subscribe". Then go back to User Cp and unsubscribe from any threads that are listed there.
Or you can change it to 'no email notification' right under "do not subscribe" which turns it off for emailing you but still puts the subscribed threads in your user cp when you click on it....hope that helps. And you will need to unsubscribe to any threads your subscribed to at the moment.
I have changed it to "dont send email" several times. Do i automatically subscribe whenever i post?
Yes, if that is not what you want then you should do as brownpimp said and change it to "do not subscribe" but no email noticfication should be taking care of it as long as you unsubscribe from the ones you were subscribing to. Hope that helps