A problem has arisen that I am unable to explain!!!

I have received numerous emails (and telephone calls) from people, informing
me that I have sent them an email that contained a virus.

This is interesting as I have an iMac, and didn't think the new virus
affected Macs.  Secondly my computer has been disconnected (and unplugged),
due to new carpet being laid, since last Thursday (22/1/04), reinstated
today.

Anybody care to offer any ideas or explanations.

Ken...