It is possible that a virus has been spreading from someone who has you in their address book - there are a number of viruses doing the rounds which take a random address to put into the "from" field on their mails. Thus, you get the mail returned to you when it is bounced back.
Ed.....Yup! I run Norton very frequently and update the virus definitions regularly. Many moons ago I often posted here on the importance of regular AV updates and frequent AV checks. Thanks though cos it is always worth repeating.
Lú-tzé....thank you too, I had considered a virus, but not that some idiot may be using my email address in the "from" box.
I'm going to recheck my virus status.
Have either of you a virus name or file I could check for please.
"some idiot may be using my email address in the "from" box" - well, they might be, but it is more likely that the virus itself does this. I cannot think of the name of one at the moment though - just ensure that you have the latest definitions and do a scan. That way you will be sure that it is not you that has the virus. If another machine is sending out emails with your address, there is little you can do. Examine the headers of one of the returned mails and see if there is anything there to identify where it might be from.