I may have found a solution! Last night I tried to upload a web page to my web site with FileZilla. Eventually the page was uploaded but only 4K of the 15K file made it across, despite a few retries...

I have suddenly had problems sending messages from Outlook 2003 on my Windows 10 PC. It might be coincidence but, having tried everything else, I decided to try compacting all my mail folders (like...