Question and response
Question
dig m320.mail.163.com. A
Answer
m320.mail.163.com. 5 CNAME hdweb.mail.ntes53.netease.com.
hdweb.mail.ntes53.netease.com. 5 A 103.129.252.49
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0