protected function task( $notification_id ) {

		$this->log( sprintf( 'sending email notification ID #%d', $notification_id ) );

		$notification = new LLMS_Notification( $notification_id );

		$view = $notification->get_view();

		if ( ! $view ) {
			$this->log( 'ID#' . $notification_id );
			return false;
		}

		// setup the email.
		$mailer = llms()->mailer()->get_email( 'notification' );

		if ( ! $mailer->add_recipient( $notification->get( 'subscriber' ), 'to' ) ) {
			$this->log( sprintf( 'error sending email notification ID #%d - subscriber does not exist', $notification_id ) );
			$this->log( $notification->toArray() );
			$notification->set( 'status', 'error' );
			return false;
		}

		$mailer->set_subject( $view->get_subject() )->set_heading( $view->get_title() )->set_body( $view->get_html() );

		// log when wp_mail fails.
		if ( $mailer->send() ) {
			$notification->set( 'status', 'sent' );
		} else {
			$this->log( sprintf( 'error sending email notification ID #%d', $notification_id ) );
			$this->log( $notification->toArray() );
		}

		return false;

	}