aal.customer.dk.telia.net has no MX records.
Question and response
Question
dig aal.customer.dk.telia.net. MX
Answer
The response has no answer records.
Authority
aal.customer.dk.telia.net. 86400 SOA dns101.telia.com. dns.telia.dk. 2602220715 28800 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0