cmail.altibox.no has no MX records.
Question and response
Question
dig cmail.altibox.no. MX
Answer
The response has no answer records.
Authority
altibox.no. 3600 SOA ns1.altibox.net. root.lyse.net. 2020121774 28800 7200 2419200 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0