Question and response
Question
dig autodiscover.secureserver.net. NS
Answer
autodiscover.secureserver.net. 5 CNAME d1mnwyjm5wndst.cloudfront.net.
d1mnwyjm5wndst.cloudfront.net. 5 NS ns-742.awsdns-28.net.
d1mnwyjm5wndst.cloudfront.net. 5 NS ns-2041.awsdns-63.co.uk.
d1mnwyjm5wndst.cloudfront.net. 5 NS ns-187.awsdns-23.com.
d1mnwyjm5wndst.cloudfront.net. 5 NS ns-1157.awsdns-16.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0