Question and response
Question
dig mx.xtra.co.nz. NS
Answer
mx.xtra.co.nz. 5 CNAME mx.xm.smxcloud.com.
Authority
xm.smxcloud.com. 38 SOA ns1-05.azure-dns.com. hostmaster.smxemail.com. 1 3600 600 604800 60
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0