smtpfront-echo command not found

Introduction

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

smtpfront-echo: command not found

or when using sudo you get the following error message

sudo: smtpfront-echo: command not found

Solutions to smtpfront-echo: command not found

How To Fix smtpfront-echo: command not found in Ubuntu / Debian / Kali Linux / Raspbian

In Ubuntu smtpfront-echo is provided by mailfront package.

mailfront is:

mailfront is a set of customizable network front-ends for mail servers. It contains complete SMTP, QMQP, QMTP, and POP3 front-ends as well as an authentication module for IMAP. The mail delivery front-ends also contain internal address filtering features.

Two SMTP back-ends are provided. One delivers mail to qmail-queue, mimicking most of the behavior of qmail-smtpd, with the addition of support for SMTP AUTH. The other rejects all SMTP commands if $SMTPREJECT is set, and execs its command line otherwise (in order to run the above program).

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

sudo apt-get -y install mailfront

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

You can also use apt command to install mailfront.

sudo apt -y install mailfront

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

sudo aptitude install mailfront

Summary

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