Need help with strange email/security

[mboy]

Ok, Company received what appears to be an old email from someone who is no longer here and no longer has an email account on my interjet mail server.
Here are the properties:
Status: U
Return-Path: <tcritt@****tech.com>
Received: (from daemon@localhost)
by InterJet.****tech.com (8.8.5/8.8.5) id HAA22508;
Mon, 8 Apr 2002 07:29:38 -0400 (EDT)
Date: Mon, 8 Apr 2002 07:29:38 -0400 (EDT)
Message-Id: <200204081129.HAA22508@InterJet.****tech.com>
Received: from UNKNOWN(198.199.210.178), claiming to be "198.199.210.150"
via SMTP by InterJet.****tech.com, id smtpdr22505; Mon Apr 8 11:29:27 2002
FROM: tbritt <tbritt@****tech.com>
SUBJECT: This is to replace
X-MSMail-Priority: Normal

Notice where it says 198.199.210.178 "caliming to be 198.199.210.150 (my gateway and pop addy)

What does this mean? When I check in the mail server/firewall, it doesnt have 198.199.210.178 as connected, but I can see it on my network. ( I know whos computer it is, I use static IP's)
Can anyone help me out here? WTF is going on?
Also the return path you will notice is Tcritt, instead of Tbritt.

Any help much appreciated!

 

[mboy]

fIGURED IT OUT, damn virus!!!