postgrey (mail/postgrey) Add to my watchlist

Postfix policy server implementing greylisting

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.

Version: 1.37 License: GPL-2 GitHub
Displaying statistics for 1,030 users who made submissions during: until

Statistics for selected duration

2024-Mar-30 to 2024-Apr-29


Total Installations 3
Requested Installations 3


macOS Versions

Loading Chart

Port Versions

Loading Chart



Xcode Versions

Loading Chart

CLT Versions

Loading Chart



Variants table

Variants Count


Monthly Statistics

Can remain cached for up to 24 hours