Hi Dave,
By default we check for a dns record based on hostname, so were really seeing if
root@server.domain.com works instead of an mx record for
root@domain.com.
You can ignore the error and create as many domains as you want later, or change the default to domain.com the first time.
If your having further issues, please provide us with output of the following:
Code:
cat /etc/hosts
cat /etc/resolv.conf
dig domain.com mx
dig domain.com any
host `hostname` <--backticks not single quotes