Custom filtering

Dear all,

I am trying to get a custom filter to work.
It is our intention to exclude a certain domain from journaling.

So this is the case the messages from and to "acertaindomain.com" should not be journaled.
I can't get the syntax right, coukld somebody please help me.
This is what i tried but that didn't seem to do the trick:

 <RULE NAME="External Recipient" ACTION="HARD_DELETE">
  <RECIPIENTS INCLUDES="NONE">
   <DOMAIN>acertaindomain.com</DOMAIN>
  </RECIPIENTS>
 </RULE>

Best regards,
Anthony