On Fri, 2007-06-29 at 10:36 -0700, Marc Perkel wrote:
> OK - I think I'm making some progress on this. I created a DNS server
> that you can pass a $sender_host_name to and get a code indicating if
> it's a one level or 2 level domain.
>
> I still have more work to do to make it practical. But - try this out
> and tell me if I'm on the right track.
>
> from your command line run:
>
> dig <host>.rb.junkemailfilter.com
>
> Example:
> dig ftp.perkel.com.rb.junkemailfilter.com
>
> It will return a 0.0.0.1 for single level domains and a 0.0.0.2 for two
> level domains.
It seems to work for the pathological case of the Japan's TLD which
until a couple years ago would have always been a "two", but now
optionally can be a "one".
Both mazda.jp and mazda.co.jp return the expected results.
--
Chris
