onamae.ne.jp has no MX records.
Question and response
Question
dig onamae.ne.jp. MX
Answer
The response has no answer records.
Authority
onamae.ne.jp. 3600 SOA ns1.gmointernet.com. hostmaster.gmointernet.com. 2026012801 1800 900 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0