code: static public function initTracking() {
  		/** @var \Base $f3 */
  		$f3 = \Base::instance();
  		if (!$f3->exists('mailer.ping_route',$ping_route))
  			$ping_route = '/mailer-ping/@hash.png';
  		$f3->route('GET '.$ping_route,'\Mailer::ping');
  
  		if (!$f3->exists('mailer.jump_route',$jump_route))
  			$jump_route = '/mailer-jump';
  		$f3->route('GET '.$jump_route,'\Mailer::jump');
  	}
docs: init routing