Fixed & Solved BlackBerry Bold 9780 Can send but not receiving email issue.
Found this solves the problem... Original link... http://supportforums.blackberry.com/t5/BlackBerry-Bold/Not-receiving-emails-on-my-Bold-9780/td-p/1094725 On your BlackBerry device, go to: 1. Options > Advanced > Host Routing Table > Menu > Register. 2. Resend your service books from your carrier BIS site: From your handheld device: http://www.blackberry.com/btsc/KB15402 Go to the Personal Email Set Up icon and log in. Then under Help!, select Service Books, then select Send service Books. From your desktop PC: http://www.blackberry.com/btsc/KB02830 North American Carriers - scroll down to select your carrier WorldWide Carriers - Find your carrier on the list 3. With the BlackBerry device powered ON, remove the battery a few seconds and then reinsert the battery to reboot. This reboot, even if you have already done this, is often needed to install the service books.