{ config, lib, pkgs, ... }:
{
  services.postfix.enable = lib.mkForce false;

  services.nullmailer = {
    enable = true;
    config = {
      me = config.networking.fqdn;
      remotes = "mail.pvv.ntnu.no smtp --port=25";
    };
  };

  systemd.sockets.userweb-sendmail-sandbox-proxy = {
    wantedBy = [ "sockets.target" ];
    listenStreams = [ "/run/userweb-sendmail-sandbox-proxy.sock" ];
    socketConfig = {
      # Accept = true;
      SocketUser = "httpd";
      SocketGroup = "httpd"; # TODO: is wwwrun(54) in this group?
      SocketMode = "0660";
    };
  };

  systemd.services.userweb-sendmail-sandbox-proxy = {
    serviceConfig = {
      User = "root";
      Group = "root";
      Sockets = [
        "userweb-sendmail-sandbox-proxy.socket"
      ];
      ExecStart = "${lib.getExe pkgs.hello}";
    };
  };
}