On Sun, 28 Sep 2003 13:34:04 -0700, Rich S. wrote:

Isn't there any simple way of determining who is the actual sender of the
virus?

Sort of. But it requires cooperation of the other ISP and most of the
time they won't do it without a court order. I have tracked down some of
the users that had a virus that kept sending me lots of them and had the
ISP inform that user, but they never told me who it was.