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Course information

Introduction to Postfix Training​ Course Outline


Module 1: Postfix Basic Configuration

  • Introduction
  • Postfix Configuration Files
  • Domain Name to Use in Outbound Mail
  • What Domains to Receive Mail for
  • Clients
  • Destinations
  • Delivery Methods
  • Trouble to Report to the Postmaster
  • Proxy/NAT External Network Addresses
  • Postfix Logging
  • Running Postfix Daemon Processes Chrooted
  • Hostname
  • Domain Name
  • Network Addresses

Module 2: Postfix Architecture Overview

  • How Postfix Receives and Delivers Mail?
  • Postfix Behind the Scenes
  • Support Commands

Module 3: Postfix Address Rewriting

  • Purpose
  • Rewrite Message Headers or Not, or to Label as Invalid
  • Postfix Address Rewriting Overview
  • Address Rewriting When Mail is Received and Delivered
  • Address Rewriting with Remote Delivery
  • Address Rewriting with Local Delivery
  • Debugging Your Address Manipulations

Module 4: Virtual Domain Hosting

  • Canonical Versus Hosted Versus Other Domains
  • Local Files Versus Network Databases
  • Shared Domains, UNIX System Accounts
  • Postfix Virtual ALIAS Example: Separate Domains, UNIX System Accounts
  • Postfix Virtual MAILBOX Example: Separate Domains, Non-UNIX Accounts
  • Non-Postfix Mailbox Store: Separate Domains, Non-UNIX Accounts
  • Mail Forwarding Domains
  • Mailing Lists
  • Autoreplies

Module 5: Bottleneck Analysis

  • Introducing the qshape Tool
  • Trouble Shooting with qshape
  • Healthy Queue
  • Deferred Queue Full of Dictionary Attack Bounces
  • Congestion in the Active Queue
  • High Volume Destination Backlog
  • Postfix Queue Directories

Module 6: Content Inspection

  • Content Inspection Overview
  • Stopping Backscatter Mail
  • Built-in Content Inspection
  • After-Queue Content Filter
  • Before-Queue Content Filter
  • Before-Queue Milter Applications

Module 7: SMTP Relay and Access Control

  • Relay Control, Junk Mail Control, and Per-User Policies
  • Restrictions that Apply to all SMTP Mail
  • Getting Selective with SMTP Access Restriction Lists
  • Delayed Evaluation of SMTP Access Restriction Lists
  • use of smtpd_Recipient_Restrictions
  • SMTP Access Rule Testing

Module 8: Postfix Lookup Table Overview

  • Postfix Lookup Table Model
  • Postfix Lists Versus Tables
  • Preparing Postfix for LDAP or SQL Lookups
  • Maintaining Postfix Lookup Table Files
  • Updating Berkeley DB Files Safely
  • Postfix Lookup Table Types

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Who should attend this Introduction to Postfix Training Course?

The Introduction to Postfix Training is a comprehensive program designed to provide participants with a foundational understanding of the Postfix mail server, an open-source software widely used for managing email communication within networks. The course is beneficial for the following professionals:

  • Network Administrators
  • Information Technology (IT) Managers
  • System Administrators
  • IT Support Personnel
  • Linux Experts
  • Email System Operators
  • Web Hosting Providers

Prerequisites of the Introduction to Postfix Training Course

There are no formal prerequisites for the Introduction to Postfix Training. However, a basic understanding of networking, email services and Postfix can be beneficial.   

Introduction to Postfix Training​ Course Overview

Postfix is a mail transfer agent (MTA) that mail servers use to route email. It has been adopted as the default MTA on Mac OS X. Postfix is also compatible with sendmail helping the existing programs and scripts to work continuously. This Introduction to Postfix Training course is designed to provide knowledge about the basic installation and configuration.

In this Introduction to Postfix Training, delegates will learn how to configure and administer files and trace message through Postfix. Delegates will also get an understanding of the Postfix queue and mail delivery. In addition, delegates will learn how to receive limits and rewrite addresses.

During this 1-day training course, delegates will gain knowledge of queue management, DNS, and email. Delegates will become familiarised with simple mailing lists and mailing-list managers. Post completion of this training, delegates will be able to configure Postfix for SASL and transport layer security and content filtering.

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What’s included in this Introduction to Postfix Training Course

  • World-class Training Sessions from Experienced Instructors
  • Introduction to Postfix Training Certificate
  • Digital Delegate Pack

Why choose us

Our Wrexham venue


Free Wi-Fi

To make sure you’re always connected we offer completely free and easy to access wi-fi.

Air conditioned

To keep you comfortable during your course we offer a fully air conditioned environment.

Full IT support

IT support is on hand to sort out any unforseen issues that may arise.

Video equipment

This location has full video conferencing equipment.

Wrexham is a town based in the north of Wales. It is located in Wrexham County Borough and has a population of around 60,000 people. There are a large number of schools in Wrexham including one Welsh speaking school Ysgol Morgan Llwyd. St Joseph’s was the first shared-faith school in Wales and the schools St David's School, Ysgol Bryn Offa and The Groves High School were combined to form two larger "super schools", Rhosnesni High School, and Ysgol Clywedog. Yale College is the largest college in Wales and provides a wide range of adult education. It has many sites across the area. Glyndŵr University was granted university status in 2008 after being established originally as the Wrexham School of Science and Art. It offers a range of undergraduate and graduate degrees to around 8000 students. The rate of unemployment in Wrexham is at around 3.6%. This is lower than the national average of Britain which is 7.6%. 

Nearby Locations include:

  • Burton
  • Moss
  • Hope
  • Lodge
  • Legacy
  • Holt
  • Southsea
  • Bradley
  • Highfield
  • Overtons
  • Newbridge
  • Erddig
  • Llandegla
  • Chirk
  • Royton
  • Brynteg
  • Summerhill
  • Rossett
  • Bangor On Dee
  • Ruabon

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Wrexham Rd,
LL13 9SW

T: 01344203999

Ways to take this course

Our easy to use Virtual platform allows you to sit the course from home with a live instructor. You will follow the same schedule as the classroom course, and will be able to interact with the trainer and other delegates.

Our fully interactive online training platform is compatible across all devices and can be accessed from anywhere, at any time. All our online courses come with a standard 90 days access that can be extended upon request. Our expert trainers are constantly on hand to help you with any questions which may arise.

This is our most popular style of learning. We run courses in 1200 locations, across 200 countries in one of our hand-picked training venues, providing the all important ‘human touch’ which may be missed in other learning styles.


Highly experienced trainers

All our trainers are highly qualified, have 10+ years of real-world experience and will provide you with an engaging learning experience.


State of the art training venues

We only use the highest standard of learning facilities to make sure your experience is as comfortable and distraction-free as possible


Small class sizes

We limit our class sizes to promote better discussion and ensuring everyone has a personalized experience


Great value for money

Get more bang for your buck! If you find your chosen course cheaper elsewhere, we’ll match it!

This is the same great training as our classroom learning but carried out at your own business premises. This is the perfect option for larger scale training requirements and means less time away from the office.


Tailored learning experience

Our courses can be adapted to meet your individual project or business requirements regardless of scope.


Maximise your training budget

Cut unnecessary costs and focus your entire budget on what really matters, the training.


Team building opportunity

This gives your team a great opportunity to come together, bond, and discuss, which you may not get in a standard classroom setting.


Monitor employees progress

Keep track of your employees’ progression and performance in your own workspace.

What our customers are saying

Introduction To Postfix Training in Wrexham FAQs


Please arrive at the venue at 8:45am.
There are no formal prerequisites to attend this course.
Anyone interested in learning about the Postfix and its working can attend this course.
We are able to provide support via phone & email prior to attending, during and after the course.
Delegate pack consisting of course notes and exercises, Manual, Experienced Instructor, and Refreshments
This course is 1 day.
Once your booking has been placed and confirmed, you will receive an email which contains your course location, course overview, pre-course reading material (if required), course agenda and payment receipts
The price for Introduction to Postfix Training certification in Wrexham starts from £1995
The Knowledge Academy is the Leading global training provider for Introduction to Postfix Training.

Why choose us


Best price in the industry

You won't find better value in the marketplace. If you do find a lower price, we will beat it.


Many delivery methods

Flexible delivery methods are available depending on your learning style.


High quality resources

Resources are included for a comprehensive learning experience.

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"Really good course and well organised. Trainer was great with a sense of humour - his experience allowed a free flowing course, structured to help you gain as much information & relevant experience whilst helping prepare you for the exam"

Joshua Davies, Thames Water

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"...the trainer for this course was excellent. I would definitely recommend (and already have) this course to others."

Diane Gray, Shell

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