Prerequisites

Before we can proceed with Postal installation, we need the following prerequisites:

• A Debian Latest system installed
• Root access to the system

Step 1: Update the system

Open your terminal and run the following command to update your system:

sudo apt update && sudo apt upgrade

Step 2: Install required packages

Postal requires some packages to be installed on our Debian Latest system. We can install them using the following command:

sudo apt install curl gnupg2 wget sqlite3 libsqlite3-dev nginx --no-install-recommends

Step 3: Add Postal Repository

Postal is not available in the Debian repository, so we need to add Postal repository. Run the following command to add Postal repository:

echo "deb https://packagecloud.io/Postal/Community/Debian/ `lsb_release -cs` main" | sudo tee /etc/apt/sources.list.d/postal.list
curl -s https://packagecloud.io/keys/postal/gpgkey | sudo apt-key add -

Step 4: Install Postal

After adding the Postal repository, we can install Postal using the following commands:

sudo apt update
sudo apt install postal

Step 5: Configure Postal

Once Postal is installed, we need to configure it by running the following command to setup the postal user:

sudo postal make-user

Next, we need to initialize the Postal database using the following command:

sudo postal initialize

Finally, we need to setup Nginx to work with Postal. To do so, we can run the following command:

sudo postal setup nginx

Step 6: Start Postal services

After configuring Postal and Nginx, we can start the Postal services using the following command:

sudo postal start

Step 7: Verify Postal installation

To verify that Postal is running successfully, we can access the Postal web interface by visiting the following URL in our web browser:

https://your-ip-address/admin/

Replace "your-ip-address" with your server IP address. Login to Postal with your postal user account and password created earlier.

Congratulations, you have successfully installed Postal on your Debian Latest system!