ddc.teliasonera.net has no MX records.
Question and response
Question
dig ddc.teliasonera.net. MX
Answer
The response has no answer records.
Authority
ddc.teliasonera.net. 3600 SOA dns.ddc.teliasonera.net. dns.telia.net. 2026022610 900 300 31536000 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0