Server mail rules can be very effective at helping you harden your Domino mail infrastructure, but they do have certain limitations. Server mail rules cannot currently examine MIME or other fields and headers not included on the list in Figure A, such as the DNSBLSite field. However, given the excellent mail processing and anti-spam features already included in Domino 6 and 6.5, it is likely these features will be added in future releases.

David Gewirtz is the author of How To Save Jobs and Where Have All The Emails Gone? For more than 20 years, he has analyzed current, historical, and emerging issues relating to technology, competitiveness, and policy. David is the Editor-in-Chief of the ZATZ magazines, is the Cyberterrorism Advisor for the International Association for Counterterrorism and Security Professionals, and is a member of the instructional faculty at the University of California, Berkeley extension. He can be reached at david@zatz.com and you can follow him at http://www.twitter.com/DavidGewirtz.