mail03.genericmobile.se has no CNAME records.
Question and response
Question
dig mail03.genericmobile.se. NS
Answer
The response has no answer records.
Authority
genericmobile.se. 3583 SOA global.excedodns.com. hostmaster.excedo.se. 1772026913 3600 900 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0