RE: you must fill your zones with TXT records

> From: Behalf Of Gordon Fecyk
> Sent: Wednesday, August 11, 2004 12:50 PM
[...]
> Now, last I checked, nothing stops a DNS implementation from 
> returning a "default" record.  That's not the same as a 
> wildcard record as wildcard semantics are clearly defined in 
> RFC 1034 4.3.2.  What I'm talking about could be 
> implementation-specific, for example in BIND 9-speak:
>
> zone "example.com." {
>       type master;
>       file "forward/example.com.dns";
>       if (query == TXT && record == FALSE)
>               record = (whatever a "deny" is);
> };
Sure. This is one of reasons subdomains must be used.
if (query == TXT && record == FALSE) {
  if(request.startWith("spfv1."))
      record = (whatever a "SPF1 deny" is);
  if(request.startWith("_ep."))
      record = (whatever a "Sender-ID deny" is);           
  if(request.startWith("_VOUCH._SMTP."))
      record = (whatever a "DNA deny" is);           
}

or for example using DNS proxy then new record type adopted:

if(request.startWith("spfv1.")) {
      query = RMX;
      retry();
}

--
Andriy G. Tereshchenko
Odessa, Ukraine