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→Listening on all interfaces
#Ensure that your '''hostname''' and '''DOMAIN''' name is properly set on your machine, otherwise you will need to set the '''myhostname''' parameter.
{{Admon/important|Warning|Make sure there are no other un-commented copies of those above-mentioned parameters in the Postfix configuration file.}}
<li>Test by connecting to it (using the '''nc''' command) from your '''vm3''' machine.</li></ol>