ctlg.yht.jp has no MX records.
Question and response
Question
dig ctlg.yht.jp. MX
Answer
The response has no answer records.
Authority
yht.jp. 300 SOA ns1.hs.ctc.jp. postmaster.yht.jp. 2024091200 28800 7200 604800 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0