New
#11
My problem seems to have been a once-off happening, as it has not re-occurred. I had been away for a few weeks with my computer off, and on checking my mail the problem manifested itself, not just with my new unread mail, but with all my previous stuff. I'm sure it had something to do with "leaving a copy on the server", which I have now de-activated, as I really don't need to access my mail remotely. So for me it is no longer an issue, but once again thanks to all who made suggestions.