I have so far not received another message unsubbing me, so maybe ...... Thanks to all those who came up with possible remedies, but I think the reason was that my 12yr old niece - who knows more about computers than I ever will - sent me two very long webcam videos that took me over an hour to download (yes my material is already obsolete!). I don't know how much space is available in our individual mailboxes, but since I deleted these things I have had no further problems. Do the experts out there consider this to be a plausible explanation? Thanks again to all Geoff