mail.isphost.net has no MX records.
Question and response
Question
dig mail.isphost.net. MX
Answer
The response has no answer records.
Authority
isphost.net. 3600 SOA ispns1.arvid.ee. root.arvid.ee. 2024101202 7200 540 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0