What Else Can I Do About This Fucker Spamming My Users!

[dougeetx]

Some dickhead is sending spam to our users pretending to be an employee of mine. Since I only have around 30 employees, I tend to know all of them. I looked up the domain it was coming from and emailed the guy a cease & desist email but other than that, what else can I do. The header from the email is below:

Return-Path: <[email protected]>
> Received: from ensim.darksidehosting.com (root@localhost)
> by erotiqueecstasy.com (8.11.6/8.11.6) with ESMTP id h8NLZ9X10357
> for <[email protected]>; Tue, 23 Sep 2003 17:35:09 -0400
> X-ClientAddr: 206.162.134.240
> Received: from kms5.kmonksristi.com (kms5.kmonksristi.com
[206.162.134.240])
> by ensim.darksidehosting.com (8.11.6/8.11.6) with SMTP id h8NLZ6J10344
> for <[email protected]>; Tue, 23 Sep 2003 17:35:07 -0400
> Message-Id: <P6S13472W172VLNV4276YJ199@T72BE9Q177535E6OD99ODCJ 5A>
> From: [email protected],
> Selection Specialist <[email protected]>
> To: <[email protected]>
> Reply-to: <[email protected]>
> Subject: Important Update
> Date: Tue, 23 Sep 2003 16:14:37 -0400
> ID: MSG_12410285-874940-chris
> X-Info: Please report any abuse from the part of list owner to
> [email protected]
> MIME-Version: 1.0
> Content-Type: multipart/alternative;
> boundary="Boundary-=_bfd2921bd8ba7d97da269a6d3dbc556cf"
> X-MailScanner-Information: Please contact the ISP for more information
> X-MScan: Found to be clean
> X-MailScanner-SpamCheck: not spam, SpamAssassin (score=4.4, required 5,
> BANG_GUARANTEE 0.50, HTML_30_40 0.89, HTML_MESSAGE 0.10,
> HTML_WEB_BUGS 0.10, HTTP_WITH_EMAIL_IN_URL 0.25,
> RCVD_IN_OSIRUSOFT_COM 0.55, RCVD_IN_SBL 1.01, RISK_FREE 0.89)
> X-MailScanner-SpamScore: ssss
> Status: