[exim] Exim Headers Showing Wrong Domain

Hi I have a website named gaincoporation.com and whenever I send an email the
headers look like this..

Return-path: <return@???>
Envelope-to: andrew@???
Delivery-date: Tue, 24 Jun 2008 10:35:45 -0400
Received: from gaincorp by alpha2.shiftcode.com with local (Exim 4.69)
    (envelope-from <return@???>)
    id 1KB9cW-0000tW-Dk
    for andrew@???; Tue, 24 Jun 2008 10:35:44 -0400
To: andrew@???
Subject: Test - Publishers - Your username and password
From: notify@???
MIME-Version: 1.0
Content-Type: text/html; charset=iso-8859-1
Message-Id: <E1KB9cW-0000tW-Dk@???>
Date: Tue, 24 Jun 2008 10:35:44 -0400

The problem is this line right here..
Received: from gaincorp by alpha2.shiftcode.com with local (Exim 4.69)

and this line...
Message-Id: <E1KB9cW-0000tW-Dk@???>

How can I get rid of this alpha2.shiftcode.com?
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