Returned mail: see transcript for details

[Post Office]

This message was undeliverable 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 4 days:
Host 167.143.5.110 is not responding.

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