mail.schebitz.name has no CNAME records.
Question and response
Question
dig mail.schebitz.name. NS
Answer
The response has no answer records.
Authority
schebitz.name. 535 SOA ns1.ns-serve.net. root.ns1.ns-serve.net. 1127226575 10800 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0