{ config, lib, pkgs, ... }: with import <stockholm/lib>; let cfg = config.krebs.exim; in { options.krebs.exim = { enable = mkEnableOption "krebs.exim"; config = mkOption { type = types.str; default = ""; description = '' Verbatim Exim configuration. This should not contain exim_user, exim_group, exim_path, or spool_directory. ''; }; user = mkOption { type = types.user; default = { name = "exim"; home = "/var/spool/exim"; }; description = '' User to use when no root privileges are required. In particular, this applies when receiving messages and when doing remote deliveries. (Local deliveries run as various non-root users, typically as the owner of a local mailbox.) Specifying this value as root is not supported. ''; }; group = mkOption { type = types.group; default = { name = "exim"; }; description = '' Group to use when no root privileges are required. ''; }; }; config = lib.mkIf cfg.enable { environment = { etc."exim.conf".source = pkgs.writeEximConfig "exim.conf" '' exim_user = ${cfg.user.name} exim_group = ${cfg.group.name} exim_path = /run/wrappers/bin/exim spool_directory = ${cfg.user.home} # https://lists.exim.org/lurker/message/20171125.034842.d1d75cac.en.html chunking_advertise_hosts = ${cfg.config} ''; systemPackages = [ pkgs.exim ]; }; krebs.setuid = { exim = { filename = "${pkgs.exim}/bin/exim"; mode = "4111"; }; sendmail = { filename = "${pkgs.exim}/bin/exim"; mode = "4111"; }; }; systemd.services.exim = { restartTriggers = [ config.environment.etc."exim.conf".source ]; serviceConfig = { ExecStart = "${pkgs.exim}/bin/exim -bdf -q30m"; ExecReload = "${pkgs.coreutils}/bin/kill -HUP $MAINPID"; }; wantedBy = [ "multi-user.target" ]; }; users = { groups.${cfg.group.name} = { inherit (cfg.group) name gid; }; users.${cfg.user.name} = { inherit (cfg.user) home name uid; createHome = true; group = cfg.group.name; }; }; }; }