plus-mail.mojsite.com has no CNAME records.
Question and response
Question
dig plus-mail.mojsite.com. NS
Answer
The response has no answer records.
Authority
mojsite.com. 3532 SOA ns1.phg.hr. server.plus.hr. 2026030504 3600 7200 3600000 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0