How can I stop yahoo starting up (trying autorun manager by mob)

Yahoo mail is starting automatically How can I stop it from doing so? I have tried autoruns MobiWIA - AndRS Studio https://play.google.com/store/apps/details?id=com.rs.autorun&hl=en which shows a bunch of "intents" for yahoo mail but I don't know what to do from there. My phone is rooted. I can see it looks like I would have to uncheck certain intents but i'm not sure which