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Changed to a more interesting question.
#Create a copy of your main.cf file on vm02 (your guest) with this lab - but delete all commented and blank lines first - like this. [cat /etc/postfix/main.cf | grep -v ^# | awk 'NF > 0 {print $0}']
#What is did changing the output of the iptables-save command on both your host and guest machinesrelay_domains parameter do?
#What firewall rule or rules, if any, did you have to enter on the guest and/or host so that email to/from each other would work?
#What is the meaning of the square brackets surrounding the IP address in the examples?
#What were the results of sending email between the host and the vm? Show log segments to verify your answers.
