Hi,
I have CentOS 7 running on half a dozen public servers. For some stuff like automatic updates using yum-cron, I have Postfix installed with a relatively basic configuration. This allows me to send important notifications to my mail address info@microlinux.fr. When there's a batch of updates, I get one mail per machine, so I can check quickly if everything went OK without having to connect to the server.
Now I'd also like to use this setup on machines that aren't in a datacenter and facing the Internet. For example, servers that have "dummy" hostnames like nestor.microlinux.lan or sauvegarde.scholae.lan. Is there a way I can setup Postfix so this machine can send an e-mail to info@microlinux.fr, even if 'hostname --fqdn' returns a "dummy" hostname?
Cheers,
Niki