Course catalog
L2-Mail
Intermediate level

Administration of Mail Servers on Linux

12 000 UAH

2 weeks 5 lesson

Start of the course

Immediately
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About course

E-mail is an important tool in companies. And if you have a tool, you need someone who will configure and maintain it. In this course, we learn to work with mail servers.

What do you need to take the course?

  • What you need to know? Text editors, user and group management, file and directory rights management, process management, network setup, DHCP (both server and client) based on Linux

  • Iptables, proxy, troubleshooting for network connections, data transmission protocols over the network, package managers, obtaining data on versions of installed programs and packages available for installation in repositories.

Course program

Setup of a domain name

Lecture 1

Set up of a domain name for working with mail. Types of NS records. MX records, priorities.

The cycle of sending and receiving of letter

Lecture 2

History of the emergence of mail, stages of development. Full cycle of letter sending. Terminology for working with mail.

Practice 1

Set up of a domain name for working with mail. Configuring TXT SPF, MX, DMARC records.

Types of protocols for sending and receiving of letters

Lecture 3

Protocols SMTP, IMAP, POP3. Answer codes. Headers of letters, sending of letters from the console, mail command. Sending of letter via telnet.

SMTP server configuration

Lecture 4

MTA, MSA. Exim, Postfix. Architecture, configuration.

Practice 2

Set up of a mail server to send letters.

IMAP/POP3 server configuration

Lecture 5

MDA. Dovecot. Architecture, configuration.

Various user configurations

Lecture 6

Postfix + dovecot, exim + dovecot bindings. Storing accounts in text files, storing accounts in the MySQL database.

Practice 3

Set up the postfix + dovecot, exim + dovecot bundles. Set up user accounts in files and in the MySQL database.

Mail logging

Lecture 7

Log files, analysis. Interpretation of email headers.

Web interfaces for mail

Practice 4

Installation and configuration of web interfaces for working with mail.

Software systems for mail

Lecture 8

Set up of an SSL certificate for mail. Self-signed certificates, letsencrypt and paid certificates.

Additional encryption functions

Lecture 9

DKIM keys for authentication and rating of the mail server. Mail server with iRedAdmin panel.

Practice 5

Set up of an SSL certificate for mail. DKIM generation and connection for additional domains on the server side and in DNS.

Project Work

Exam

Project Work

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At the end of the course the student will know

  • principles of the DNS protocol
  • what are the main records in NS-zones for mail domains: MX, TXT SPF, DKIM, DMARC
  • how SMTP, POP3, IMAP protocols work
  • principles of construction of architectures MTA, MSA, MDA
  • types of configurations and communication of mail servers
  • which are web interfaces for managing mail servers and web interfaces for users

At the end of the course the student will be able to

  • configure DNS records for mail domains to raise the rating of mail
  • choose the right architecture to build mail servers
  • set up e-mail to send and receive mail
  • analyze and eliminate errors in sending and delivering letters
  • install and configure web interfaces to manage mail servers
  • install and configure web interfaces to manage users
  • provide SSL encryption when forwarding emails
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