Enterprise DNS, Mail and Mail Gateway

Now-a-days almost every organization depends on e-mailing system as communication medium, and even it is not only used for communication, but also acts as an identity of an employee/user. Along with easy communication, emails convey lots of confidential data, the mailing system of an organization should be managed and administered by its in-house resources. In addition of deploying secured and healthy mail server, a mail gateway server is needed to protect the mail server against all email threats from the outside world to protect their users from spam, viruses, phishing and trojans. Domain name system (DNS)is the backbone of the Internet that is used to translate human-memorable domain names into the corresponding IP addresses as well as to identify and locate computer systems and resources on the Internet.

Course Objectives

The training will focus on deploying industry standard mailing system using postfix, dovecot, roundcube, where a mail server is to be protected by gateway server as safeguard using PMG (Proxmox Mail Gateway) which is the leading open-source email security solution helping organizations of any size from anti-spam and anti-virus facility.   This training will also focus on setting up DNS servers for a domain using BIND 9, and demonstrates DNS Security Extension (DNSSEC), how they works and how to prevent attackers from manipulation or poisoning DNS requests.   This 24 hours course features intensive hands-on training that focuses on installing, configuring, and managing emailing system and DNS server, which includes a detail explanation of each configuration parameters and pre-defined troubleshooting to common practical problems. This course prepares you to administer a full-fledge emailing and DNS infrastructure for an organization of any size.
At the end of this training, the participants will be able to:
  • Deploy an industry standard mailing system.
  • Set up advanced methods (SPF, DKIM, ADSP, DMARC) for enhancing email deliverability and security.
  • Aware of major security concerns in time of setting up the mailing system.
  • Ensure security of the mailing system by deploying a mail gateway.
  • Implement clustered (master/slave) DNS server with DNSSEC securityenable.
  • Migrate mail server from one platform to another
  • Setup email marketing infrastructure.

Target Audience

  • System Engineer
  • IT Professionals

Course Pre-Requisites : ​

  • Operating System Concepts
  • Networking Fundamental
  • Computer Hardware Concepts
  • TCP/IP Protocols

Course Summary

Course Fee

৳ 12,000

Training Method


Total Modules


Course Duration

24 Hours

Total Session


Class Duration

2 Hours

Details Course Outlines


Course Introduction


Introduction to Domain Name System (DNS)


Detail Understanding of DNS Records


Implement Master DNS Server using BIND 9


Implement Slave/Secondary DNS Server using BIND 9


Detail Overview to Mailing System and Prerequisite setup


Installation and Configuration of Postfix


Installation and Configuration of Dovecot


Installation and Configuration of NGINX with Certbot


Installation and Configuration of Roundcube


Installation and Configuration of ViMbAdmin


Integration of MAIL GATEWAY


How to Enhance Email Deliverability and Security


Additional Settings on Mail Server


Enabling Logging and Final Testing


Mail Server Migration

Email Marketing