Postgrey is a policy server implementing greylisting to filter spam on Postfix mail servers. The principle of greylisting works on the basis that much spam is sent by spambots and other non RFC compliant MTAs.

The REVLY Communication Server installs and configures a fully functional instance of Postgrey configured to work with the following components:

During the setup of the REVLY Communication Server a wizard gathers information needed to create configuration files to make the various components work together. Below is a brief summary of the questions asked. For a detailed description of the process please view the Installation Guide.