Question and response
Question
dig citibob.com. MX
Answer
citibob.com. 3600 MX 0 mx.citibob.com.
Authority
The response has no authority records.
Additional
mx.citibob.com. 3600 A 139.99.68.138
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0