.expect("[smtp2tg.toml] missing \"maildir\" parameter.\n").into();
	let listen_on = settings.get_string("listen_on")
		.expect("[smtp2tg.toml] missing \"listen_on\" parameter.\n");
	let core = TelegramTransport::new(settings);
	let sink = Builder + Name::new("smtp2tg") + DebugService +
		my_prudence() + MailDir::new(maildir.clone()).unwrap();

	env_logger::init();

	task::spawn(async move {
		loop {
			// relay mails
			if let Err(err) = relay_mails(&maildir, &core).await {
				// in case that fails - inform default recipient
				if let Err(err) = core.debug(format!("Sending emails failed:\n{:?}", err)).await {
					// in case that also fails - write some logs and bail