I miss the old days, before you had to worry about spam.

I’m not OP, and I have everything set up fine now; Mailcow would replace what I currently have with the same software components, so I don’t see any value there - for myself.

Something like Maddy is completely at odds with the Unix philosophy, and yet I’ve fought enough with postfix to dislike it enough to want to try an all-in-one. I dread the DKIM setup, though; that took so much time, and the mail server configuration wasn’t the hard part. Maybe now I’ve got it configured for my domains, switching email server software will be easier.