-------- Weitergeleitete Nachricht -------- Betreff: Undelivered Mail Returned to Sender Datum: Wed, 3 Sep 2014 12:20:02 +0200 (CEST) Von: Mail Delivery System <MAILER-DAEMON@data01.opd.xres.de> An: root@data01.opd.xres.de This is the mail system at host data01.opd.xres.de. I'm sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below. For further assistance, please send mail to postmaster. If you do so, please include this problem report. You can delete your own text from the attached returned message. The mail system <k.springer@activate.de>: host mailgw01.rz1.opd.xres.de[10.21.2.30] said: 550 5.1.1 <k.springer@activate.de>: Recipient address rejected: undeliverable address: host mx1.mailmanager.de[85.239.120.132] said: 550 5.1.1 <k.springer@activate.de>: Recipient address rejected: User unknown in virtual mailbox table (in reply to RCPT TO command) (in reply to RCPT TO command)