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 -- ## List details at http://www.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://www.exim.org/eximwiki/