backup-mta.globalipaction.ch has no CNAME records.
Question and response
Question
dig backup-mta.globalipaction.ch. NS
Answer
The response has no answer records.
Authority
globalipaction.ch. 1638 SOA anycast26.irondns.net. dns.domaintechnology.ch. 2026012612 14400 3600 1814400 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0