You're the second person to say that and it's still wrong. The virii,
once resident, opens a connection to port 25 on an open SMTP server,
whether it be the user's ISP relay or local server. Sure, it can't
install itself into /etc/init.d, but it sure can launch itself bg instead
of fg and be running until the user either kills it or reboots the box.
Also, for reference to other people - the preview pane does *not* allow
the execution of attachments unless they're double-clicked on and
acknowledged. Again - we're not talking about another OS or Outlook
exploit, only a stupid user exploit.