Hi everyone. I hope all of you are staying healthy and safe. I want to set up Postfix as a backup MX for a few of my Windows-based mail servers. I have never done this before so I have been researching to see what I could find. So far, the most complete instructions I have found are here: https://www.linuxbabe.com/mail-server/how-to-set-up-a-backup-email-server-postfix-ubuntu
Have any of you used that article to set up Postfix as a backup MX? If yes, how complete was it? If not, does anyone have different instructions that they wouldn't mind sharing with me? Thanks!