Postfix is a popular open-source Mail Transfer Agent (MTA) that can be used to route and send an email on a Linux system. It is estimated that about 25% of public mail servers on the Internet run Postfix. In this article, we are going to teach you How to Install Postfix on Ubuntu 20.04 [linux vps] step by step.

How to Install Postfix on Ubuntu Linux

We will mention some of the features of Postfix at the beginning of this article. Then we will fully explain how to install and configure Postfix on Ubuntu 20.04. Please stay tuned for the rest of this article.

Postfix Features

Postfix is one of the most common mail servers that can send and receive emails while running on Linux. The best feature of this server is that it is free and open-source, which makes it more popular among people. So, in this article, we will explain how to install Postfix on Ubuntu 20.04.

Tutorial Install Postfix on Ubuntu 20.04

Install Postfix on Ubuntu 20.04

To install Postfix on Ubuntu 20.04, follow these steps:

We will launch the terminal on Ubuntu 20.04 and update the system to get all the new packages and updates ready. To do this, type the following command in the terminal and then press Enter:

sudo apt update

After successfully running the above command, type the following command in your terminal and then press Enter:

sudo DEBIAN_PRIORITY=low apt install postfix

Here, DEBIAN_PRIORITY is an environment variable that allows us to configure additional options with regular Postfix installation. These options appear in the terminal as notifications or dialog boxes that allow us to choose from the given options.

How to Configure Postfix on Ubuntu 20.04

In this section, we want to teach you to step by step how to Configure Postfix on Ubuntu 20.04. As soon as we press the Enter key to start the Postfix installation process, different types of email server configurations are displayed. After studying the types of configurations and deciding which email server to maintain, press the Enter key to continue as shown below:

 

Tutorial Install Postfix on Ubuntu 20.04

 

Now we are asked to select our Mail Server Configuration type. Select the Internet Site option from that list and press the Enter key as shown below:

 

Installing Postfix on Ubuntu 20.04

 

After doing this, we will be asked to select our Fully Qualified domain name (FQDN) or System Mail Name. In this example, I typed my Mail Name in the textbox and then pressed the Enter key to continue, as shown in the image below:

 

Postfix on Ubuntu 20.04

 

At the next step, we are asked to select the Root and Postmaster Mail recipient. We can keep our original username in Ubuntu 20.04. Press Enter key to continue as shown below:

 

Tutorial Install Postfix on Ubuntu 20.04

 

After doing this, we are asked to select all possible domains for which the email server is able to accept emails. We can add another domain name according to our needs. Otherwise, we can go to the default options and press the Enter key to continue, as shown in the image below:

 

configuring Postfix on Ubuntu 20.04

 

It then asks if we want to force the synchronous update in the mail queue. As shown in the image below, select No, which is also the default option, and then press Enter to continue:

 

Postfix configuration on Ubuntu 20.04

 

After that, we are asked to select the LANs. We can change them to suit our needs, or we can even select the default ones by pressing the Enter key as shown below:

 

Tutorial Install Postfix on Ubuntu 20.04

 

Now we are asked to adjust the size range of Mailbox by bytes. This is used to determine the size of messages that the inbox can accept. Its default value is zero, which means that there is no limit to the size of the messages. As shown in the image below, stick to the default option and press Enter:

 

Tutorial Install Postfix on Ubuntu 20.04

 

Then we are asked to select the Local Address Extension character. We stay with the default character and press the Enter key to continue, as shown in the image below:

 

Tutorial Install Postfix on Ubuntu 20.04

 

Finally, we are asked to choose the Internet protocol we want. Select all from this list and then press Enter to continue, as shown in the image below:

 

Tutorial Install Postfix on Ubuntu 20.04

 

Now the Postfix installation process takes a while to complete. Once completed, our terminal will look something like this:

 

Tutorial Install Postfix on Ubuntu 20.04

 

Conclusion

In this article, you learned about the features, installation, and setup of Postfix on Ubuntu 20.04. Everything was said about Postfix. To install this software, you can use our step-by-step tutorial, and if you have any questions or problems, you can ask in the comments section.