this is a repeating problem over the last few months and even on latest 4.3.3 OS. Symptoms are that you are offline or in a poor reception area on 3G ( could be wifi too) and drafting up emails ready for when you connect again. They sit in the outbox for Excahnge mail account on the iPad. When internet connection comes back some emails just disappear entirely - they disappear from the outbox on the iPad but never arrive and are entirely lost from the iPad, not in outbox, sent items or drafts etc. Very severe as you can imagine if drafting long emails on a plane and they disappear when you land ! Anyone else seeing this ? Some forum messages seem to have the same symptoms but no-one seems to be clocking this as a major apple iOS bug ?