Unless email servers have gotten a lot more turnkey in the last few years, I'm gonna disagree with this, sorry. :) I can get nginx running on most systems with

Unless email servers have gotten a lot more turnkey in the last few years, I'm gonna disagree with this, sorry. :) I can get nginx running on most systems with literally a couple commands ("package-manager-thing install nginx" and "service-manager-thing start nginx"). Getting a mail server running -- at least in any form that qualifies as "Gmail replacement" -- seems to involve "install postfix, immediately edit the configuration because it has no out-of-the-box defaults, create multiple configuration files beyond that because that's how postfix rolls, install dovecot, immediately edit its configuration because it has no out-of-the-box defaults either, create some directories and user accounts and more configuration files because that's how dovecot rolls, then test that everything's working." And I'm leaving out the "install MySQL" part that many guides you'll find online will also have you do. Also, I haven't talked about running a spam filter and YOUR HARD DRIVE IS ALREADY FULL OF NIGERIAN PRINCES TRYING TO SELL YOU PENIS-ENLARGING BITCOIN I'M SO SORRY. I would love it if "package-manager-thing install mail-server-thing" and "service-manager-thing start mail-server-thing" could get things going with sensible defaults like they do with nginx, even if you'd probably need to tweak things after they were going just like you're almost certainly going to do with a web server. But AFAIK, that just ain't the case.