My droplet is Ubuntu 14.04. Virtual hosts on Apache have been setup and work fine (even with Ghost self-installed!). I am wanting to set up an email server, likely following the tutorial here for iRedMail or Postfix et al.
I am however confused by how to set up a FQDN for one email domain when I have multiple domain names on one droplet, the same droplet I will install the mail server on.
When I check hostname I get the name of my droplet, MyDroplet. When I check /etc/hosts I see 127.0.0.1 localhost 127.0.1.1 MyDroplet
Now, I have read all the other questions about FQDN but I haven’t been able to understand if the answers apply to my setup since I (apparently) did not see a similar setup.
So the question is how can I run one mailserver on one droplet to handle mail for three (or more) different domains?
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