Warning: could not send message for past 4 hours

[Mail Delivery Subsystem <MAILER-DAEMON@metalab.unc.edu>]

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    **      THIS IS A WARNING MESSAGE ONLY      **
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The original message was received at Tue, 22 Oct 2002 09:30:00 -0400
from ldp-doc@localhost

   ----- The following addresses had transient non-fatal errors -----
ldp-doc
    (expanded from: ldp-doc)

   ----- Transcript of session follows -----
ldp-doc... Deferred: Name server: industrial.metalab.unc.edu: host name lookup failure
Warning: message still undelivered after 4 hours
Will keep trying until message is 5 days old
Reporting-MTA: dns; tribal.metalab.unc.edu
Arrival-Date: Tue, 22 Oct 2002 09:30:00 -0400

Final-Recipient: RFC822; ldp-doc@tribal.metalab.unc.edu
X-Actual-Recipient: RFC822; ldp-doc@industrial.metalab.unc.edu
Action: delayed
Status: 4.2.0
Remote-MTA: DNS; industrial.metalab.unc.edu
Last-Attempt-Date: Tue, 22 Oct 2002 13:30:48 -0400
Will-Retry-Until: Sun, 27 Oct 2002 08:30:00 -0400

--- Begin Message ---

• To: ldp-doc
• Subject: Cron <ldp-doc@tribal> /export/sunsite/users/ldp-doc/bin/addem >> /export/sunsite/users/ldp-doc/mhonarc.out 2>&1
• From: root (Cron Daemon)
• Date: Tue, 22 Oct 2002 09:30:00 -0400

/bin/sh: /export/sunsite/users/ldp-doc/mhonarc.out: No such file or directory

--- End Message ---