postfwd1 command not found

Introduction

When you run more command in linux terminal / console, you get the following error message

postfwd1: command not found

or when using sudo you get the following error message

sudo: postfwd1: command not found

Solutions to postfwd1: command not found

How To Fix postfwd1: command not found in Ubuntu / Debian / Kali Linux / Raspbian

In Ubuntu postfwd1 is provided by postfwd package.

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).

To fix this problem, we can install more using the command below.

sudo apt-get -y install postfwd

This command might take some time to finish depending on your machine internet connection.

You can also use apt command to install postfwd.

sudo apt -y install postfwd

Or if you have aptitude installed you can use the following command.

sudo aptitude install postfwd

Summary

In this tutorial we learn how to fix postfwd1 command not found error in Ubuntu / Debian / Kali Linux or Raspbian distribution.