Hello Steffen,You have to enable CRON job.Set the auto-cron to enable will only check for new tickets when an Admin or a Staff member is working on the system. If nobody logon, it will do absolutely nothing.So firstly, you have to activate the cron job (cron.php) with a scheduled task running on the machine hosting the web site.The Cron job will run as many times as you configure your scheduled task. But do not forget to configure the fetch frequency in Emails > Emails > Youremail@xxx.com