Thrilled and touched though I am by the massive response I thought I would share the latest on my predicament.
The message above appears only when sending mail, so I assumed Norton's scanning of my emails both internal and external, particularly external, may be the culprit. Somehow the act of starting to scan my outgoing mail is interrupting my connection to my mail server and only moving my email's to the Sent Items box without actually having sent them.
I have since 'switched off' the scanning of outgoing emails and it worked perfectly. This puts the onus of scanning incoming emails onto the recipient, which should be done anyway, but it would be nice to be able to do it both ways. This software worked OK on Win2K and I am sure it worked OK on XP Pro until recently.
Again, any suggestions ?