[Exim] What am I doing wrong?

Following is a header for some spam I recieve every day.
No matter what I do I can't stop this trash from coming into
my computer.

In my configuration file I have the following;

host_reject_recipients = *.yahoo.com:*.mecnet.net:*.adena.cc

Even though all these addresses show up in the header below
it still gets through.
What am I doing wrong?

Thanks


>From liqpjftdcpovtppm@??? Thu Feb 21 13:15:40 2002

Return-path: <liqpjftdcpovtppm@???>
Envelope-to: larrywyb@???
Delivery-date: Thu, 21 Feb 2002 13:15:40 -0600
Received: from adena.cc ([216.23.28.242] helo=ntserver.adena.cc)
        by larry.yi.org with esmtp (Exim 3.33 #1)
    id 16dygt-0005E8-00
        for larrywyb@???; Thu, 21 Feb 2002 13:15:40 -0600
Received: from opytl.yahoo.com
(jbf1-meccorp.backbone.mecnet.net [216.20.1.195])
 by ntserver.adena.cc with SMTP (Microsoft Exchange Internet Mail Service
Version 5.5.2653.13)
        id XX6YFMG9; Tue, 19 Feb 2002 12:15:10 -0500

From: liqpjftdcpovtppm@???
To: zrfnxihjqoghnhxk@???
Reply-To: bradleybessler4565@???
Subject: No Fee!  Accept Credit Cards Today!
             [kks8j]
Content-type: text/html; charset=ISO-8859-1
X-Mailer: Microsoft Outlook Express 5.50.4133.2400
Message-Id: <E16dygt-0005E8-00@???>