mail.verteiler.org has no CNAME records.
Question and response
Question
dig mail.verteiler.org. NS
Answer
The response has no answer records.
Authority
verteiler.org. 3600 SOA 1-you.njalla.no. you.can-get-no.info. 2026030301 21600 7200 1814400 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0