Returned mail: see transcript for details

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

Your message could not be delivered because the destination server 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 could not be delivered within 8 days:
Host 139.242.97.179 is not responding.

The following recipients could not receive this message:
<xmlschema-dev@w3.org>

Please reply to postmaster@w3.org
if you feel this message to be in error.