Along time ago I enabled global address lists for my university exchange email server. I disabled the contact list but all the hundreds of thousands of emails still propagate on the mail.app address selection box. This has become quite a problem for accidentally clicking the wrong emails, etc. Is there anyway I can mass wipe the cache without having to delete my iPhone backup and restore fresh (I like to keep all my old text messages). I know you can delete 1 by 1 but that would take me forever.