* Even if they the individuals could read your MX records, your local network is using IP addresses on a '''private subnet''', which is not routeable on the Internet, so it cannot be reached from outside of your system.

'''Perform the following steps:'''

#Write your observations in your lab logbook.

We will be demonstrating the use of the telnet application to test that the postfix service is running.

=== Listening on all interfaces ===

The configuration file is '''/etc/postfix/main.cf''' Edit it and change '''inet_interfaces''' to '''all'''.