Question and response
Question
dig etrn.iks-jena.net. MX
Answer
etrn.iks-jena.net. 57600 MX 10 excalibur.iks-jena.de.
Authority
The response has no authority records.
Additional
. 0 OPT [{Extended_DNS_Error: PROHIBITED}] ; payload 1232, xrcode 0, version 0, flags 0