dns.ddc.teliasonera.net has no MX records.
Question and response
Question
dig dns.ddc.teliasonera.net. MX
Answer
The response has no answer records.
Authority
ddc.teliasonera.net. 3600 SOA dns.ddc.teliasonera.net. dns.telia.net. 2026030440 900 300 31536000 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0