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→Testing the connection to the Postfix Service
'''Perform the following steps:'''
# If the '''nc''' command is not installed on your vm2 machine, install it (install '''nc''' command for your '''centos3''' vm 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.org ESMTP Postfix</source>
