I used this straightforward article to set up automatic updates on my Ubuntu servers.
However, on the first server I tried it on, I chose the wrong option because the “Postfix Configuration” step was not mentioned/listed in the article. To go along with the steps of the article, I should have selected “No configuration” after step 2, but I actually selected “Internet Site”. Now I don’t see options to set the Unattended-Upgrade email and automatic-reboot settings. I tried rm’ing the /etc/apt/apt.conf.d/50unattended-upgrades file, but still not getting the Postfix Configuration when trying to re-install.
How can I reset/change the configuration back to the default “No configuration”? I am still learning, so my troubleshooting skills could use some work, but I don’t want to have to re-image the server and start over from scratch.