Mailu is an open-source and easy-to-use email server that offers a variety of features such as webmail, DKIM signing, spam filtering, and more. This tutorial will guide you on how to install Mailu on Debian latest.
Before you begin, you must have the following:
Ensure that your system is up-to-date by running the following command:
sudo apt update && sudo apt upgrade -y
Mailu runs inside Docker containers, so you must install Docker and Docker-Compose.
To install Docker, run the following command:
sudo apt install docker.io
To install Docker-Compose, run the following command:
sudo apt install docker-compose
After installing Docker and Docker-Compose, verify that they are installed correctly by running the following commands:
docker --version
docker-compose --version
Clone the latest version of Mailu from the GitHub repository by running the following command:
git clone https://github.com/Mailu/Mailu.git
Change to the Mailu directory:
cd Mailu
Mailu uses environment variables to configure the email server. The easiest way to set up these variables is by using the provided .env file.
Copy the example env file:
cp examples/configs/.env .env
Open the .env file:
nano .env
Update the following variables:
MAILU_HOSTNAME: Enter your domain name without the www prefix.MAILU_ADMIN: Enter the desired email address of your Mailu administrator.MAILU_APIKEY: Enter a secure passphrase that will be used to manage Mailu.MAILU_FIRSTDOMAIN: Enter your domain name.MAILU_LANDINGPAGE: Set to true to enable the Mailu landing page.Start Mailu by running the following command:
docker-compose up -d
This command creates and starts the necessary containers in the background.
The Mailu web interface, where you can access email, can be accessed by opening a web browser and navigating to https://yourdomain.com/mail.
By default, Mailu is not secured with SSL/TLS, which leaves it vulnerable to eavesdropping and other security issues.
To secure Mailu with an SSL/TLS certificate, you can use a LetsEncrypt SSL/TLS certificate.
First, install Certbot by running the following command:
sudo apt install certbot python3-certbot-nginx
Next, run the following command to request and install a LetsEncrypt SSL/TLS:
sudo certbot --nginx -d yourdomain.com -d www.yourdomain.com
During the installation process, follow the prompts to configure the SSL/TLS certificate.
In this tutorial, you have learned how to install Mailu on Debian latest. You can now configure it to your liking and begin using it as your email server.
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