nameserver2.kvh.ne.jp has no MX records.
Question and response
Question
dig nameserver2.kvh.ne.jp. MX
Answer
The response has no answer records.
Authority
kvh.ne.jp. 600 SOA nameserver1.kvh.ne.jp. postmaster.kvh.ne.jp. 2022042101 10800 3600 604800 600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0