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
bertema@uni-muenster.de: cannot access mailbox /dfs/u/b/bertema/.briefkasten for user bertema. unable to create lock file /dfs/u/b/bertema/.briefkasten.lock: Disk quota exceeded