postal.arcatest.ch has no CNAME records.
Question and response
Question
dig postal.arcatest.ch. NS
Answer
The response has no answer records.
Authority
arcatest.ch. 465 SOA dns0.test-infra.ch. dns.arcanite.ch. 2026022861 21600 900 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0