This is the Postfix program at host batch10.uni-muenster.de.
I'm sorry to have to inform you that your message could not be 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 Postfix program
mail_is_not_read_by_bertema@uni-muenster.de (expanded from bertema@uni-muenster.de): unknown user: "mail_is_not_read_by_bertema"