Postfix Hardening Guide for Security and Privacy

Learn how to secure the configuration of Postfix with this guide, and increase both security and privacy.


Postfix is a common software component on servers for receiving or sending email. It has a lot of configuration options available, including those to improve your Postfix security. This Postfix security and privacy guide will help with hardening your Postfix configuration. After you are finished, your system will have improved defenses against spam, abuse, and leaking sensitive data. Why Postfix hardening? Every service that is connected to the internet is sooner or later to be abused by automated scripts.