How to Configure Ubuntu 22.04 with Postfix VM to Use Proxmox Mail Gateway

If you are looking for a way to configure your Ubuntu 22.04 with Postfix VM to use Proxmox Mail Gateway, then you have come to the right place. In this post, we will guide you through the entire process, step by step.

Step 1: Install Ubuntu 22.04

The first step in configuring your Ubuntu 22.04 with Postfix VM to use Proxmox Mail Gateway is to install Ubuntu 22.04 on your machine. You can download the ISO file from the official website and install it using any virtualization software like VMware or VirtualBox.

Step 2: Install Postfix

Once Ubuntu is installed, you need to install Postfix, which is a popular open-source mail transfer agent that is used to route and deliver email. To install Postfix, you can use the following command:

sudo apt-get install postfix

Step 3: Configure Postfix

After Postfix is installed, you need to configure it to work with your Proxmox Mail Gateway. To do this, you need to edit the Postfix configuration file located at /etc/postfix/main.cf. You can use any text editor like Nano or Vim to open the file.

sudo nano /etc/postfix/main.cf

Once you have opened the file, you need to add the following lines at the end of the file:

relayhost = [proxmox-mail-gateway.example.com]:587
smtp_use_tls=yes
smtp_sasl_auth_enable=yes
smtp_sasl_password_maps=hash:/etc/postfix/sasl_passwd
smtp_sasl_security_options=noanonymous

Make sure to replace proxmox-mail-gateway.example.com with the actual hostname of your Proxmox Mail Gateway.

Step 4: Create a Password File

After adding the above lines to the Postfix configuration file, you need to create a password file that contains the login credentials for your Proxmox Mail Gateway. To do this, you can use the following command:

sudo nano /etc/postfix/sasl_passwd

In the file, add the following line:

[proxmox-mail-gateway.example.com]:587 username:password

Again, make sure to replace proxmox-mail-gateway.example.com with the actual hostname of your Proxmox Mail Gateway and replace username and password with your actual login credentials.

After adding the line, you need to hash the file using the following command:

sudo postmap /etc/postfix/sasl_passwd

Step 5: Restart Postfix

Finally, you need to restart Postfix to apply the changes you made to the configuration file. To do this, use the following command:

sudo service postfix restart

That’s it! You have successfully configured your Ubuntu 22.04 with Postfix VM to use Proxmox Mail Gateway. Now, you can send and receive emails using your Proxmox Mail Gateway.