dns2.edu.cn has no MX records.
Question and response
Question
dig dns2.edu.cn. MX
Answer
The response has no answer records.
Authority
edu.cn. 21600 SOA dns.edu.cn. hostmaster.net.edu.cn. 2026021260 7200 1800 604800 21600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0