Query Denied bind 9.4

[Dean Clapper]

I turned off allow-query from "any" to just internals.  While I was watching 
the message logs I keep on getting the same message from outside 
sources.

client 212.17.192.45#53: query 'UTC.UNIV-COOP.AUSTIN.TX.US/A/IN' 
denied

They are trying to query the same name over and over.  However it is 
different clients from the outside.  The same machine is also the mail 
server.

Is the reason this is happening because they are trying to find our domain to 
send emails?  However, we are currently getting emails?

thanks
DC