Asking for SMTP Server help

Hey all,

We have a Windows 2000 Server running IIS5 and we added the SMTP service to
it. We are attempting to get this box set up to relay email to the "outside
world" for a new system we have here. We have not messed with it much so
everything is pretty much default. However, whenever email is sent it
appears to be adding header type information inside the email body.

I did a quick test email and this is the body:

-----------------
Return-Path: webmaster@[...company name...]
Message-ID: <INTRA-WEBX3cf3ednHM00000224.TakeThisOut@intra-web.pinalcounty.mis>
X-OriginalArrivalTime: 01 Sep 2004 15:23:07.0609 (UTC)
FILETIME=[95536C90:01C49037]
Date: 1 Sep 2004 08:23:07 -0700

Testing the email SMTP server
-----------------

I have tried looking through all the tabs under Properties in the IIS
Management utility. I don't see anything that allows me to modify, change,
or disable this. I am not having any luck looking through the help files,
or my Google attempts. I personally have no experience with the Microsoft
IIS SMTP service so I ask for your help on this. Your input is greatly
appreciated.

-- Andrew