mx02.ipv6.cm02.cloud-mail.jp has no MX records.
Question and response
Question
dig mx02.ipv6.cm02.cloud-mail.jp. MX
Answer
The response has no answer records.
Authority
CLOUD-MAIL.JP. 3600 SOA NS21.FreeBit.NET. root.FreeBit.NET. 2026012201 3600 900 604800 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0