you'll have to do some debugging to see if you have a DNS problem.
- if you are not running a local DNS server, consider running one
- if your DNS queries are forwarded to your SP, consider disabling this
- if your postfix has chrooted services, consider disabling chroot.
- if your system resolver has bugs, try from another system
> The DNS table looks like
it doesn't matter how it may look like to you. if you want help, show
the real domain.