nsa2.dft.tw has no MX records.
Question and response
Question
dig nsa2.dft.tw. MX
Answer
The response has no answer records.
Authority
dft.tw. 7200 SOA nsa1.dft.tw. tiger.dft.tw. 2025121109 3600 120 604800 7200
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0