[Mimedefang] How can I get this email blocked?

[Matt Rossiter]

Hi there,

I keep getting repeated spams which contain the following html code.

<snip>

<font color=000000 size=2 face=arial>
Download your soft ware from our Superfast (100mbits connection) site &
you will be given your own exclusive registration key to register the soft
ware you bought from us, and now you have your own registered copy of soft
ware (will never expired again)<br><br>
It's <b>OEM version</b> of soft ware which is an <b>Original/Genuine soft
ware</b>, strictly no piracy soft ware 
</font>
<center>
<b><a
href=http://drs.yahoo.com/fastness/eldritchlegatary/*%68ttp://bracingdissolute.s%74orefr%65e%2E%62iz/0/p/
target=_blank><font color=0000FF size=5 face=arial><u>Over 850 popular
titles for you to choose from<br><br>Act quick now before all
sold<br><br>Start using your needed soft ware now<br>== C L I C K - H
E R E ==</b><br><font size=2>(Plz give 2-3 mins to complete the page
loading bcos the page has 850 titles on it)</font><br><br></u></a>
<a
href=http://drs.yahoo.com/colubertitanosaur./tophetperdition/*%68ttp://sade.s%74orefr%65e%2E%62iz/%75n%73ub.html
target=_blank><font size=1>take me down</font></a>

</snip>


I normally have anything with a .biz URI in the message filtered
out.  This one doesn't seem to get caught.  It usally gets tagged with a
spam score of 2.5 and my tolerance is 5.0.  The link in this email takes
you to a domain called storefree.biz - can someone suggest away of
eliminating this spam?

Thanks

Matt