It's called the MYDOOM or NOVARG virus, and I have received several hundred copies of it in the last few days. Someone who uses this forum is infected with it, as I am getting copies of it spoofed from fefcholden.org.au addresses, like
jane@vic.fefcholden.org.au and so on.
Update your virus software, and turn off the Preview Window (the third pane that shows the email contents under the list of headers). Don't open any emails purporting to be Microsoft Patches, or Undeliverable Email notices.
Better still, get rid of Outlook Express and use an email client that doesn't have the huge security holes. I recommend MacOSX Mail
cheers
RET
(Smug Virus-Free Mac-Using Bastard)