mail.acato.cloud has no CNAME records.
Question and response
Question
dig mail.acato.cloud. NS
Answer
The response has no answer records.
Authority
acato.cloud. 3391 SOA ns1.shockmedia.nl. hostmaster.shockmedia.nl. 2026020502 10800 1800 345600 43200
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0