time-japan.co.jp has no MX records.
Question and response
Question
dig time-japan.co.jp. MX
Answer
The response has no answer records.
Authority
jp. 900 SOA z.dns.jp. root.dns.jp. 1772666102 3600 900 1814400 900
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0