Everyday I get Instant Messaged by my cPanel box that says DNS is setup incorrectly.

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[blackstar.excalibursystems.net] IMPORTANT: Do not ignore this email.
   The hostname (blackstar.excalibursystems.net) resolves to .  It should resolve to 75.125.91.226.  Please be sure to correct /etc/hosts as well as the 'A' entry in zone file for the domain.
   Some are all of these problems can be caused by
   /etc/resolv.conf being setup incorrectly.  Please check this file if you
   believe everything else is correct.
  
   You may be able to
           automaticly correct this problem by using the ' Add an A entry for your
           hostname ' under ' Dns Functions ' in your Web Host Manager

I've checked everything that I can think of, yet I still keep getting these emails. I have an A Entry for blackstar.excalibursystems.net. If anyone else tries to do a lookup on it comes back correctly.

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[root@blackstar ~]# cat /etc/resolv.conf
nameserver 75.125.91.226
nameserver 207.44.128.228
nameserver 70.87.7.73
[root@blackstar ~]#

As far as I can tell my resolv.conf is also correct. Anyone have any insight on this problem?