mail-m81128.netease.com has no MX records.
Question and response
Question
dig mail-m81128.netease.com. MX
Answer
The response has no answer records.
Authority
netease.com. 60 SOA ns4.nease.net. admin.nease.net. 20810175 7200 1800 1209600 60
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0