dmgauth2.cloud.fence-mail.jp has no MX records.
Question and response
Question
dig dmgauth2.cloud.fence-mail.jp. MX
Answer
The response has no answer records.
Authority
cloud.fence-mail.jp. 3600 SOA ns0.dns.nifcloud.com. hostmaster.dns.nifcloud.com. 1695201732 10800 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0