Internal Configuring Postfix

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All servers deliver mail through

note: it's easiest to choose Satellite when prompted during apt install

Gather the public IP address of the server you're configuring mail on.

  1. Login to
    1. Add $IPAddress/32 to the mynetworks directive found in /etc/postfix/
    2. Restart postfix
  2. Login to your $server
    1. Change the relayhost directive to
    2. Restart postfix
    3. Test configuration
# requires mailutils

echo "Hello World" | $mailcmd -s 'test' my@emailaddress.tld

note: you can just use mail instead of $mailcmd, I had to do this to get around mod_security on this webserver