Question and response
Question
dig najionline.com. MX
Answer
najionline.com. 3600 MX 0 mx.najionline.com.
Authority
The response has no authority records.
Additional
mx.najionline.com. 3600 AAAA 2607:5500:3000:80c:19e5:5597:1a64:47b5
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0