ubuntu-dk Delivery reports about your e-mail

[vriend at embl-heidelberg.de]

This message was not delivered due to the following reason(s):

Your message was not delivered because the destination computer was
not reachable within the allowed queue period. The amount of time
a message is queued before it is returned depends on local configura-
tion parameters.

Most likely there is a network problem that prevented delivery, but
it is also possible that the computer is turned off, or does not
have a mail system running right now.

Your message was not delivered within 5 days:
Mail server 18.239.153.76 is not responding.

The following recipients could not receive this message:
<ubuntu-dk at lists.ubuntu.com>

Please reply to postmaster at embl-heidelberg.de
if you feel this message to be in error.