How To Install postfwd on Ubuntu 18.04
Introduction
In this tutorial we learn how to install postfwd on Ubuntu 18.04.
What is postfwd
postfwd is:
Postfwd is written in perl to combine complex postfix restrictions in a ruleset similar to those of the most firewalls. The program uses the postfix policy delegation protocol to control access to the mail system before a message has been accepted. It allows you to choose an action (e.g. reject, dunno) for a combination of several smtp parameters (like sender and recipient address, size or the client’s TLS fingerprint).
There are three methods to install postfwd on Ubuntu 18.04. We can use apt-get, apt and aptitude. In the following sections we will describe each method. You can choose one of them.
Install postfwd Using apt-get
Update apt database with apt-get using the following command.
sudo apt-get update
After updating apt database, We can install postfwd using apt-get by running the following command:
sudo apt-get -y install postfwd
Install postfwd Using apt
Update apt database with apt using the following command.
sudo apt update
After updating apt database, We can install postfwd using apt by running the following command:
sudo apt -y install postfwd
Install postfwd Using aptitude
If you want to follow this method, you might need to install aptitude first since aptitude is usually not installed by default on Ubuntu. Update apt database with aptitude using the following command.
sudo aptitude update
After updating apt database, We can install postfwd using aptitude by running the following command:
sudo aptitude -y install postfwd
How To Uninstall postfwd on Ubuntu 18.04
To uninstall only the postfwd package we can use the following command:
sudo apt-get remove postfwd
Uninstall postfwd And Its Dependencies
To uninstall postfwd and its dependencies that are no longer needed by Ubuntu 18.04, we can use the command below:
sudo apt-get -y autoremove postfwd
Remove postfwd Configurations and Data
To remove postfwd configuration and data from Ubuntu 18.04 we can use the following command:
sudo apt-get -y purge postfwd
Remove postfwd configuration, data, and all of its dependencies
We can use the following command to remove postfwd configurations, data and all of its dependencies, we can use the following command:
sudo apt-get -y autoremove --purge postfwd
References
Summary
In this tutorial we learn how to install postfwd package on Ubuntu 18.04 using different package management tools: apt, apt-get and aptitude.
