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edits
Changes
fixed parsing error from source=bash
#The '''postfix''' application should be installed by default. If it isn't, install it.
#Postfix is capable of sending email with the default configuration, so start and enable this service, and verify that the postfix service is running.
#Look for the running postfix service in the list of listening ports by issuing the following command:<br><source lang="bash">ss -atnp</source>
#Which service is postfix running? Locate the port used by SMTP, and look for connections with the state LISTEN (i.e. currently listening).
#Write your observations in your lab logbook.
# If the '''nc''' command is not installed on your vm2 machine, install it (install '''nc''' command for your '''vm3''' as well).
# Connect from your '''vm2''' to itself using the '''nc''' command by issuing the following command:<br><source lang="bash">nc localhost 25</source># You should see a response: <br><source lang="bash">220 vm2.yourdomain.ops ESMTP Postfix</source>
# You could theoretically use SMTP commands to send an email here, but this would be a very unusual use of your mail server. You have an '''MUA''' for a reason.
#Enter the command '''QUIT''' to close the connection to the server, then '''<ctrl>-c''' to terminate the nc command.
# In your '''vm2''' machine, 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.ops</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>
#Ensure that your '''hostname''' and '''DOMAIN''' name is properly set on your machine, otherwise you will need to set the '''myhostname''' parameter.
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