RETURNED MAIL: DATA FORMAT ERROR

[workers.comp at state.co.us]

The message was not delivered due to the following reason:

Your message was not 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 1 days:
Host 151.54.197.101 is not responding.

The following recipients could not receive this message:
<feedback at pld-linux.org>

Please reply to postmaster at state.co.us
if you feel this message to be in error.