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Postfix Tutorial

Last updated Sep 3, 2021

This tutorial series is for well-known Mail server “Postfix”.

Here, we will discuss everything about postfix SMTP server and configuration.

As a system administrator, email server configuration and monitoring are an essential skill, and its use in almost every organization.

Postfix application is a Mail Transfer Agent (MTA), and use to send and receive emails.

Nowadays, every application needs SMTP or MTA configuration to send the alert, notification, and communication for any changes or whatever triggers we configured to application.

If we want to send or receive any communication over the email, we need SMTP or MTA application and server.

Postfix is one of the essential open sources MTA and SMTP server, almost every open source application comes with postfix configuration which is easy to configure and ready to use instant.

In this tutorial, we try to cover every possibility with Postfix in respect of configuration on inbuilt options for the SMTP server.
Here, we list the content for this tutorial.

Postfix Tutorial Objectives:

Section 01: General Configuration

Section 02: SMTP relay/access control

Section 03: Content inspection

Section 04: Problem solving

Postfix – Detailed Course Content:

Section 01: General Configuration

Postfix Installation
Postfix Installation from source code
Postfix Basic configuration
Postfix Standard configuration
Postfix Address rewriting
Postfix Virtual domain hosting
Postfix SASL Authentication
Postfix IP Version 6 Support
Postfix SMTPUTF8 support
Postfix TLS Encryption and authentication
Postfix TLS Forward Secrecy
Postfix Multiple-instance management
Postfix logging to file or stdout

Section 02: SMTP relay/access control

Relay/access control overview
Access policy delegation
Address verification
Per-client/user/etc. access
Zombie blocking with postscreen

Section 03: Content inspection

Content inspection overview
Stopping backscatter mail
Built-in content inspection
After-queue content filter
Before-queue content filter
Before-queue Milter applications

Section 04: Problem solving

Bottleneck analysis
Stress-dependent configuration
Performance tuning
Debugging strategies

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