If you ever get an email telling you about a virus, check it on either the Sophos one already listed, or Symantec. 9 times out of 10 it will most likely be a hoax.
btw, regarding Outlook - the XP and 2003 versions automatically block a lot of files types, so that they cannot be accessed. This includes things like .exe, .scr, .pst, etc.
There is a patch you can use to circumvent this, but the easiest way (without messing around with the registry) is to get whoever is sending you such a file to zip it up and send it that way. You can then pretty sure that it is from a trusted source.
And the tip about putting
[email protected] is a hoax as well!