sobig virus

[Joe Stuart]

I have Mailscanner running with f-prot and it seems to be stopping about
10-15 viruses a minute which is extremely high vloume. It also seems
that a lot of them are getting through. A usual header of an email that
comes from the outside starts with

Received: from scrubber.edenpr.org
        by edenpr.k12.mn.us; Wed, 20 Aug 2003 09:34:42 -0500

the ones getting through seem to be starting with

Recieved from PC2860
       (splkpark.k12.mn.us[204.169.235.111])
        by edenpr.k12.mn.us; Wed, 20 Aug 2003 09:32:28 -0500

And they are all .pif's. Scrubber is the server with mailscanner on it.
I'm coinfused about the PC2860

Thanks
Joe