This is the Mail-Delivery-Service. I'm sorry to have to inform you that your message could not be delivered to one or more recipients. For further assistance, please contact your Mailadmin. From: 010001796b100282-116659f8-9dde-423e-a1fd-2b095adffd92-000000@amazonses.com To: sebastian.surma@zv.fraunhofer.de Subject: Invitation to become a reviewer for DRUID21 mail-mtaka26.fraunhofer.de[153.96.1.26] reply 550 #5.1.0 Address rejected.