nixos/modules/crans/nullmailer.nix

{ ... }:

{
  services.nullmailer = {
    enable = true;

    setSendmail = true;
    config = {
      remotes = ''
        smtp.adm.crans.org smtp
      '';
      adminaddr = "root@crans.org";
      defaulthost = "crans.org";
      allmailfrom = "root@crans.org";
    };
  };
}