IMPORTANT: Do not ignore this email.
The hostname (hostname.server.com) resolves to . It should resolve to xx.xx.xx.xx. 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.

A newly setup cPanel system may have such an error message when you login to WHM.

You can resolve this by going to the DNS Functions area on the left menu and selecting Add an A Entry for your Hostname.

WHM should automatically try to add the relevant A record for your hostname to the DNS zone present on your system. You can now logout and then log in back to WHM to see if the message returns.