Returned mail: Data format error

This message was undeliverable due to the following reason(s):

Your message could not be delivered because the destination computer was
unreachable 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:
Server 17.21.139.24 is not responding.

The following recipients did not receive this message:
<deal-h_at_lists.village.virginia.edu>

Please reply to postmaster_at_paoli.atm.lmco.com
if you feel this message to be in error.