How To Install postgrey on Fedora 36

In this tutorial we learn how to install postgrey in Fedora 36. postgrey is Postfix Greylisting Policy Server

Introduction

In this tutorial we learn how to install postgrey on Fedora 36.

What is `postgrey`

Postgrey is a 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, 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.

We can use yum or dnf to install postgrey on Fedora 36. In this tutorial we discuss both methods but you only need to choose one of method to install postgrey.

Install postgrey on Fedora 36 Using dnf

Update yum database with dnf using the following command.

sudo dnf makecache --refresh

After updating yum database, We can install postgrey using dnf by running the following command:

sudo dnf -y install postgrey

Install postgrey on Fedora 36 Using yum

Update yum database with yum using the following command.

sudo yum makecache --refresh

After updating yum database, We can install postgrey using yum by running the following command:

sudo yum -y install postgrey

How To Uninstall postgrey on Fedora 36

To uninstall only the postgrey package we can use the following command:

sudo dnf remove postgrey

postgrey Package Contents on Fedora 36

/etc/postfix/postgrey_whitelist_clients
/etc/postfix/postgrey_whitelist_clients.local
/etc/postfix/postgrey_whitelist_recipients
/etc/sysconfig/postgrey
/usr/lib/systemd/system/postgrey.service
/usr/sbin/postgrey
/usr/sbin/postgreyreport
/usr/share/doc/postgrey
/usr/share/doc/postgrey/Changes
/usr/share/doc/postgrey/README
/usr/share/doc/postgrey/README.Fedora
/usr/share/doc/postgrey/README.exim
/usr/share/licenses/postgrey
/usr/share/licenses/postgrey/COPYING
/usr/share/man/man8/postgrey.8.gz
/var/spool/postfix/postgrey

References

postgrey website

Summary

In this tutorial we learn how to install postgrey on Fedora 36 using yum and [dnf]((/fedora/36/dnf/).