{ config , lib , pkgs , ... }: with lib; let cfg = config.my.programs.email; in { options.my.programs.email = { enable = mkOption { default = false; type = types.bool; example = true; }; }; config = mkIf cfg.enable { # Email Applications users.users.moritz.packages = with pkgs; [ thunderbird ]; networking.firewall.allowedTCPPorts = [ 33728 1025 1143 ]; }; }