[Apakabar] Warning: message 1Kto1k-0002t0-80 delayed 24 hours

[Mail Delivery System]

This message was created automatically by mail delivery software.
A message that you sent has not yet been delivered to one or more of its
recipients after more than 24 hours on the queue on feynman.zen.co.uk.

The message identifier is:     1Kto1k-0002t0-80
The subject of the message is: =?koi8-r?B?7NXe28XFINDP0s7PIMkg08XL0yDXycTFzyDU1dQ=?=
The date of the message is:    25 Oct 2008 19:26:19 +0100

The address to which the message has not yet been delivered is:

  enquiries at northumberlandcaravanparks.com
    Delay reason: SMTP error from remote mail server after RCPT TO:<enquiries at northumberlandcaravanparks.com>:
    host 82.71.204.13 [82.71.204.13]: 451 Temporary local problem - please try later

No action is required on your part. Delivery attempts will continue for
some time, and this warning may be repeated at intervals if the message
remains undelivered. Eventually the mail delivery software will give up,
and when that happens, the message will be returned to you.