How to Install Exim on Linux Mint

Exim is a widely used Mail Transfer Agent (MTA) for Unix-like operating systems, and it's free and open-source. In this tutorial, we will learn how to install Exim on Linux Mint.

Prerequisites

Before starting, you need to ensure that you have the following:

  • A running Linux Mint environment
  • A terminal window
  • Root or sudo privileges

Step 1: Update the Package List

It's always a good practice to have the latest package list before installing anything. To update the package list, open a terminal window and run the following command:

sudo apt-get update

Step 2: Install Exim

Now that we have updated our package list, we can install Exim by running the following command:

sudo apt-get install exim4

This command will install the Exim package along with its dependencies.

Step 3: Configure Exim

After we have installed Exim, we need to configure it. The default configuration file of Exim is located at /etc/exim4/update-exim4.conf.conf. It's recommended to take a backup of this file before making any changes to it.

sudo cp /etc/exim4/update-exim4.conf.conf /etc/exim4/update-exim4.conf.conf.orig

Now, open the /etc/exim/update-exim4.conf.conf file in your preferred editor and edit the following sections as needed:

  1. DCconfig_internet: This section defines how Exim should handle connections to the internet. Make sure that the dc_local_interfaces option is set to the IP addresses or hostnames of your server.

  2. DCeximconfig_configtype: This section defines the configuration type used by Exim. Set it to internet for a basic internet-facing mail server.

  3. DCsmarthost: If you plan to relay outgoing emails through a third-party email service, you can configure it in this section.

Once you have made the necessary changes, save the file and close your editor.

Step 4: Restart Exim

Finally, we need to restart Exim to apply the new configuration. Run the following command:

sudo service exim4 restart

Conclusion

In this tutorial, we learned how to install and configure Exim on Linux Mint. Exim is a powerful and flexible MTA that can handle a high volume of email traffic. With the proper configuration, Exim can become a reliable email server for your organization.