When using DNSPort, Other Query type(MX,TXT) not resolved correctly

I'm using DNSPort to anonymize my DNS queries. I changed from public DNS, because of PRISM scandal.

And I found this problem:

"A" Query resolved correctly,

nslookup -type=a google.com Address: X.X.X.X

but "MX" and "TXT" returns...

nslookup -type=mx google.com *** can't find google.com: Not implemented ***

So my question is, how can I request MX and TXT over Tor DNS? This "DNSPort" will be great alternative to public dns services, if Tor can do this.

{An idea about this problem} How about adding "DNSRelayIP"?

sample: DNSPort 127.0.0.1:53 DNSRelayIP 129.250.35.250 DNSRelayIP 129.250.35.251

Meaning: User can query A,MX,TXT to Tor DNS. Tor will query A via Tor. Tor will query MX and TXT to "DNSRelayIP"(TCP normal traffic).

Trac:
Username: ikurua22

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