Question and response
Question
dig srv1.com. MX
Answer
srv1.com. 300 MX 10 tuesday.mxrouting.net.
srv1.com. 300 MX 20 tuesday-relay.mxrouting.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0