s31-mail.hhos.net has no MX records.
Question and response
Question
dig s31-mail.hhos.net. MX
Answer
The response has no answer records.
Authority
hhos.net. 3600 SOA ns1.hhos.net. hostmaster.hhos.net. 2026030647 14400 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0