I went into my Watched Topics section on the top of the page, and checked off "Unwatch" on those topics which were old and no longer getting new posts. There were a lot of them. Every now and then I would get a little window on the screen which said that I would no longer get emails regarding new posts on this topic and did I want to proceed? I clicked on OK but only that one topic disappeared and all the others I wanted to "unwatch" remained. Does anyone know how to do this so it works?