Step by step guide how to install email server on Linux server

[ZeroTrust]

Step-by-Step Guide for Installing an Email Server4

Update your system:
Open a terminal window
Run the command sudo apt update
Run the command sudo apt upgrade

Install Postfix:
Run the command sudo apt install postfix

Choose Internet Site when prompted
Enter the domain name of your server when prompted

Install Dovecot:
Run the command sudo apt install dovecot-imapd
Choose No when prompted


Configure Dovecot:
Open the file /etc/dovecot/dovecot.conf in a text editor

Find the line that reads protocols = imap and change it to protocols = imap pop3

Find the line that reads disable_plaintext_auth = yes and change it to disable_plaintext_auth = no

Save and close the file


Configure Postfix:
Open the file /etc/postfix/main.cf in a text editor

Find the line that reads inet_interfaces = all and change it to inet_interfaces = loopback-only

Find the line that reads mydestination = $myhostname and change it to mydestination = localhost

Save and close the file

Restart the services:
Run the command sudo service postfix restart

Run the command sudo service dovecot restart

That's it! You now have a working email server on Ubuntu 18.04.