mx1-4.ilait.se has no CNAME records.
Question and response
Question
dig mx1-4.ilait.se. NS
Answer
The response has no answer records.
Authority
ilait.se. 3277 SOA ns1.ilait.se. registry.ilait.se. 2025121600 14400 3600 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0