I'm extremely annoyed by this. I have an AOL, Yahoo, and Exchange email accounts on my phone. Whenever I receive an email, and read it and delete it on my computer, the phone still shows the email as new. Over the course of the day, I might get 50 emails, and delete 45 of them. At the end of the day I pick up my phone and all 50 emails are on my phone and marked unread. SO frustrating. Any suggestions?