Short description of ORF Enterprise Edition 4.2: ORF Enterprise Edition is an enterprise-level anti-spam solution that helps you to block spam before it reaches your network. ORF uses a combination of anti-spam technologies and custom filtering options to stop the spam on SMTP protocol level.
ORF can be used with Windows 2000's/2003's built-in IIS SMTP Service and Microsoft Exchange Servers (2000, 2003 or 2007)