c.spf.ntesmail.com has no MX records.
Question and response
Question
dig c.spf.ntesmail.com. MX
Answer
The response has no answer records.
Authority
ntesmail.com. 3600 SOA blogns1.netease.com. admin.nease.net. 20221306 7200 1800 1209600 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0