Question and response
Question
dig redrockcheck.com. MX
Answer
redrockcheck.com. 3600 MX 0 mx.redrockcheck.com.
Authority
The response has no authority records.
Additional
mx.redrockcheck.com. 3600 A 51.38.144.215
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0