IT Guys,

I've been getting 5 to 10 infected emails everyday. I have Norton installed
and because I have an ADSL connection to net, I update norton's virus
database almost on daily basis. So Norton detects all viruses and deletes
infected attachments.

What puzzles me is, although Norton scans every email in and out, I get some
bounced mails or warnings from admins informing a message I have
(supposedly) sent is infected or contains a virus. I get this bounced mails
or warning messages from domains I never send email to. Subjects/ headers
are not familiar at all. Obviously I didn't send them. Does anyone else get
such mails?

Now I wonder, is it

a) My computer is actually infected and some virus is sending mails to some
arbitrary email addresses and I am not aware of this because I do not see
them in my sent messages folder, OR
b) Infected emails do contain my email address as sender, but originate from
another computer and emails bounce back to me just because it is my address
in sender field?

What do you think?

(That's about the best I can explain this question in English. Hope it makes
sense.)