I solved the problem by uninstalling then reinstalling the email accont on the ipad (withe exactly the same settings). It all works fine now.
Thanks for the help JA.
My wife has been having a problem with mail collection on her iPad. I know something about computers and networking but nothing about iPads or 3g (I don’t even own a mobile phone – no really!).
On Wi-Fi at home she can collect her mail from her mail server using the iPad’s onboard...