mail.paxango.de has no CNAME records.
Question and response
Question
dig mail.paxango.de. NS
Answer
The response has no answer records.
Authority
paxango.de. 300 SOA ns1.domain24.com. hostmaster.domain24.com. 2025060502 28800 7200 604800 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0