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→Listening on all interfaces
=== Listening on all interfaces ===
'''Perform the following steps:'''
# Launch in editing session for the postfix configuration file called: '''/etc/postfix/main.cf'''
# Our first editing change to the Postfix configuration will be to make the service "listen" for incoming connections on the external interface (i.e '''eth0''' from the VMs point of view).<br>Change the value of the following parameter to what is displayed below:<br><source lang="bash">inet_interfaces = all</source>
# We should also set the string that will end up in the '''From:''' header in messages sent by this server.<br>Change the '''mydomain''' option to YOUR domain name (shown below):<source lang="bash">mydomain = yoursenecaid.org</source>
# Also you must set the '''hostname''' for this server so that will correctly specify the hostname in the '''From:''' head in a sent mail message.<br>Make certain the following parameter only appears once (shown below):<source lang="bash">myorigin = $myhostname</source>
'''Record steps, commands, and your observations in INVESTIGATION 2 in your OPS335 lab log-book'''
==INVESTIGATION 3: SENDING EMAIL BETWEEN MTAs for vm2 and vm3 (NO ENCRYPTION)==