postgrey 1.32

Description:  Postfix Greylisting Policy Server
Maintainer:  Manuel Oetiker <manuel@oetiker.ch>
Created:  2008-08-04
Updated:  2008-08-04 (Package Prepared)
Support:  Manuel Oetiker <manuel@oetiker.ch>
Links:  Homepage, SEPP Dir, INSTALL
OS:  linux
Categories:  system
Binaries:  postgrey
More Info
Postgrey is a Postfix policy server implementing greylisting developed by David Schweikert. Development of Postgrey started at the ISG.EE and is now sponsored by Open Systems AG.

When a request for delivery of a mail is received by Postfix via SMTP, the triplet CLIENT_IP / SENDER / RECIPIENT is built. If it is the first time that this triplet is seen, or if the triplet was first seen, less than 5 minutes ago, then the mail gets rejected with a temporary error. Hopefully spammers or viruses will not try again later, as it is however required per RFC.