restoring ipad from back up has lost some mail passwords
I recently had to send my iPad2 away for a new screen. Before doing so I backed it up to my MBacBookPro and when it returned restored from that back up. Mail has remembered some of my passwords but seems to have forgotten two others. I have checked that I am using the right ones through Keychain Access app but it (the iPad) continues to ask for them when I log into Mail. It is most infuriating and symptomatic of what happens via the cloud (or so it seems).
has anyone had the same problem and if so how do you cure it. I am fed up putting in the correct password only to have it rejected - should I delete those accounts from the ipad and then reinstall them?