I’m partial to https://gitlab.com/simple-nixos-mailserver/nixos-mailserver https://gitlab.com/simple-nixos-mailserver/nixos-mailserver Does require some NixOS

I’m partial to https://gitlab.com/simple-nixos-mailserver/nixos-mailserver https://gitlab.com/simple-nixos-mailserver/nixos-mailserver Does require some NixOS knowledge, but is nice for upgrades.