[otrs] Not autoreplying on vacation messages?

We have one queue with an automatic responses configured. Since we're using the email address of this queue for sending out reminders ("Your account is about to expire on ..."), we're getting out-of-office replies back to the queue, which are then automatically replied to. So, what I'd like to know is how I can prevent OTRS from replying when the Subject: contains "Abwesend:" (which is a good indication for an out of office autoreply in Germany). -- Ralf Hildebrandt Charite Universitätsmedizin Berlin ralf.hildebrandt@charite.de Campus Benjamin Franklin http://www.charite.de Hindenburgdamm 30, 12203 Berlin Geschäftsbereich IT, Abt. Netzwerk fon: +49-30-450.570.155