A few improvements we need to do on this machine.

This vm is used to relay (authenticated) emails out to people from various places (copr cron outputs, flock / conference stuff, packager reports).

1. It would be nice to adjust postfix config to not leak the headers/ips from the orig systems, ie something like https://serverfault.com/a/998993 or the like

2. The ssl cert on this machine is a self signed one, but it's also expired. Would be nice to generate a new one and make sure to keep it up to date.