"Has not downloaded from server" ...appears daily when I try to re-read emails in inbox, or "sent" or "trash." I use a Comcast email on my iPad. After uploading IOS 9.1 and the previous version this message began appearing and now appears with increasing frequency. It happens on emails in IN BOX that I had previously read hours earlier...it can happen when I check my "sent" category just moments later and will say "cannot download from server." I went to the Apple Genius Bar, and they said to upload Xfinity app and get mail,from there. I did, but that made no difference.