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Configure and Use an SMTP Server for Email Forwarding

Using a system to forward email to another system or for an entire domain is a common use case for SMTP. In this activity, you will get a chance to install and work with SMTP as a forwarding agent in order to better understand the flow of messages between systems.

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Path Info

Clock icon Intermediate
Clock icon 1h 0m
Clock icon Nov 12, 2018

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Table of Contents

  1. Challenge

    Install Postfix Client and Server Utilities

    In order to install the packages we need for the SMTP server and client, we need to install postfix, telnet and mailx like so:

    sudo yum install -y mailx telnet postfix
  2. Challenge

    Enable Email Forwarding on Server from Host Name/IP Address

    You will need to use the postconf utility to edit several variables in the /etc/postfix/ configuration file, ther are:

    postconf -e "mydestination =, localhost.localdomain, localhost"
    postconf -e "mynetworks =,"
    postconf -e "inet_interfaces = all"

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