This tutorial will guide you through the installation process of Courier Mail Transfer Agent (MTA) on Fedora Server. The Courier MTA is an open source mail server that enables you to easily send and receive emails.
Before you proceed with installing the Courier MTA, it is crucial to update your system to ensure that you have the latest packages installed. To do so, run the following command:
sudo dnf update
Once your system is updated, you can go ahead and install the Courier MTA by running the following command:
sudo dnf install courier-mta
This will download and install the Courier MTA package along with its dependencies.
Courier MTA has few setting which are customizable through its configuration files. By default, the configuration file is located at /etc/courier/ directory.
We will be modifying below configurations in our installation.
concurrencylocal - default concurrency limit for local deliveries. We will increase it from the default 10 to 50.
concurrencyremote - default concurrency limit for remote deliveries. We will increase it from the default 10 to 50.
maxrcpt - maximum number of recipients allowed per incoming message. We will increase it from the default 50 to 250.
To make the required changes, run the following command:
sudo nano /etc/courier/esmtpd
This configuration file has all required variables defined. Navigate to variables in the file by scrolling down the file or using CTRL + W keys.
Modify the variables as shown below:
ESMTPDSTART=YES
CONCURRENCYLOCAL=50
CONCURRENCYREMOTE=50
MAXRCPT=250
Save the file by pressing CTRL + X, followed by Y and then Enter.
After making changes, restart the Courier MTA service to apply the new settings by running the following command:
sudo systemctl restart courier
The Courier MTA should now be up and running on your Fedora Server. To verify this, run the following command:
sudo systemctl status courier
You should see an output indicating that the Courier MTA service is active (running).
In this tutorial, you have learned how to install and configure the Courier MTA on Fedora Server. You can now start sending and receiving emails using your very own mail server.
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