Can't add spam sender to junk list because no valid email address is used: the email address or domain name you entered is not valid. valid entries include or

On Exchange Server 2003 I am getting several emails a day from a sender " Alexis %LAST NAME " and can not add the email or user to junk email rules because there is no valid email address to block.  when i try and classify the email as junk email - the error i get is: the email address or domain name you entered is not valid.  valid entries include or  It seems that the only way to block this user is to block the entire domain in the smtp virtual server.  However, when you choose to do this the smtp virtual server dialogue warns that this is a heavy burden on the exchange server and will slow performance on inbound emails.  I only have a few users on this domain.  SO - I am looking for some suggestions on how to stop these.  I am running GFI mail esentials and have the SCL values at 6 / 5 on the IMF.  Thanks.

This is the header information from the email that is coming in:

Microsoft Mail Internet Headers Version 2.0
Received: from ([]) by mydomain.server.local with Microsoft SMTPSVC(6.0.3790.1830);
       Sat, 2 Jul 2005 15:14:46 -0400
X-Message-Info: 2mSJgydXLQ70Ap57lXTweuF338ZAM387wrHKMltPTD16
Received: from (222) by with Microsoft SMTPSVC(5.0.2195.6824);
       Fri, 01 Jul 2005 23:08:47 +0600
Received: from ( by
  (SMTPD32-7.12     ) id R06KL961; Fri, 01 Jul 2005 20:08:47 +0300
Subject: Re: undeniable advertising method for your site..
From: " Alexis %LAST NAME "
Message-Id: <>
Content-Type: multipart/alternative;
X-OriginalArrivalTime: 02 Jul 2005 19:14:46.0957 (UTC) FILETIME=[4F8F9DD0:01C57F3A]
Date: 2 Jul 2005 15:14:46 -0400
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Try to block the return path address and see if that will help. Also check if the source is always the same ip address, you can block it bu IP address.


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