ctcsva.ctc.co.jp has no MX records.
Question and response
Question
dig ctcsva.ctc.co.jp. MX
Answer
The response has no answer records.
Authority
ctc.co.jp. 300 SOA ns1.hs.ctc.jp. postmaster.ctc.co.jp. 2026021800 28800 7200 604800 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0