ns2.as27400.net has no MX records.
Question and response
Question
dig ns2.as27400.net. MX
Answer
The response has no answer records.
Authority
as27400.net. 3600 SOA ns1.as72400.net. sysops.as27400.net. 2024021901 10800 900 1814400 7200
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0