[Druid] Undelivered Mail Returned to Sender

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: 010001849974c5ef-22ed5922-140d-4ec9-9211-643bc76d1451-000000@amazonses.com To: sebastian.surma@zv.fraunhofer.de Subject: DRUID23 Lisbon: First Call for Papers mail-mtaka29.fraunhofer.de[153.96.1.29] reply 550 #5.1.0 Address rejected.