mx1.azureit.se has no CNAME records.
Question and response
Question
dig mx1.azureit.se. NS
Answer
The response has no answer records.
Authority
azureit.se. 10800 SOA ns1.coreit.se. registry.coreit.se. 2015121141 21600 10800 1209600 14400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0