wwws.fctv.jp has no MX records.
Question and response
Question
dig wwws.fctv.jp. MX
Answer
The response has no answer records.
Authority
fctv.jp. 600 SOA ns.fctv.ne.jp. postmaster.ns.fctv.ne.jp. 100111 7200 1800 1209600 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0