mx1-n.global-mail.cn has no MX records.
Question and response
Question
dig mx1-n.global-mail.cn. MX
Answer
The response has no answer records.
Authority
global-mail.cn. 180 SOA ns3.dnsv4.com. enterprise2dnsadmin.dnspod.com. 1772521819 3600 180 1209600 180
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0