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→Sample client setup
If everything is working - that's good, now you know what you'll try to build in the email labs. The goal is to have the exact same setup using your servers instead of Seneca servers.
= MTA - Postfix =
We'll use Postfix as the MTA, and we'll set it up on vm2. This will be the email server for your internal network. You'll be able to send email out of your network, and receive email from within your network, but not receive from outside your network because:
# Outsiders will never find the MX recors for your domain, because there are no .org servers pointing to your DNS server.
# Even if they did - your local network is using IP addresses on a private subnet, which is not routeable on the internet, so it cannot be reached from the outside.