Someone is spoofing Presto Vivace, Inc

Someone is spoofing the Presto Vivace, Inc. corporate email. I just received the following notice-

From postmaster@hestia.liberation.fr Fri Oct 29 13:13:03 2004
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From: postmaster@hestia.liberation.fr
Message-Id: <200410291709.i9TH97h29175@hestia.liberation.fr>
X-Authentication-Warning: hestia.liberation.fr: iscan owned process doing -bs
To:
Subject: Spam mail warning notification! (Attachment Removal)
Date: Fri, 29 Oct 2004 19:09:01 +0200
MIME-Version: 1.0
Content-Type: multipart/mixed;
boundary="----=_NextPart_000_1099069741_B78506032.R82506026"

This is a multi-part message in MIME format.

------=_NextPart_000_1099069741_B78506032.R82506026
Content-Type: text/plain;
charset="iso-8859-1"
Content-Transfer-Encoding: 7bit

**************** eManager Notification *****************

The following mail was blocked since it contains sensitive content.

Source mailbox:
Destination mailbox(es): allouche@liberation.fr
Policy: Attachment Removal
Attachment file name: message.scr - audio/x-wav
Action: Replaced with text

eManager has removed a sensitive attachment file in the email.

******************* End of message *********************

------=_NextPart_000_1099069741_B78506032.R82506026
Content-Type: text/plain;
charset="iso-8859-1"
Content-Transfer-Encoding: 7bit

From: marshall@prestovivace.biz
To: allouche@liberation.fr
Subject: Mail Delivery (failure allouche@liberation.fr)
Date: Fri, 29 Oct 2004 13:10:22 -0400
MIME-Version: 1.0
Content-Type: multipart/related;
type="multipart/alternative";
boundary="----=_NextPart_000_001B_01C0CA80.6B015D10"
X-Priority: 3
X-MSMail-Priority: Normal

------=_NextPart_000_1099069741_B78506032.R82506026--

_________________________________________

What, if anything, can be done?