mail.wallner.digital has no CNAME records.
Question and response
Question
dig mail.wallner.digital. NS
Answer
The response has no answer records.
Authority
wallner.digital. 3422 SOA hydrogen.ns.hetzner.com. dns.hetzner.com. 2026012901 86400 10800 3600000 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0