In the last 6 hours, I have found in my E-Mail 38viruses. This includes "the one" that spoofed my "from" E-Mail address and sent it back to me. The IP address it was "actually" sent from is located in Canada. This does not include the 27 "bounced" messages from servers telling me the "user does not exist." It also does not include the 15 automated messages some system administrators insisting on "warning" the sender of the "virus" attachment.
I have Ranted about viruses before and this is no exception. If anything "funny" is happening with your system, ensure your scanner is completely up to date and read all of the recent attacks located on Symantec.com or your favorite security site.
I have said it before and I will say it again: I will never send you or anyone else a file attachment out of the blue. If you did receive such a thing seemingly from "me," delete it immediately.
More information on this particular threat is here: