spf.service.netease.com has no MX records.
Question and response
Question
dig spf.service.netease.com. MX
Answer
The response has no answer records.
Authority
netease.com. 60 SOA ns4.nease.net. admin.nease.net. 20810158 7200 1800 1209600 60
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0