mx.newscpt20.de has no CNAME records.
Question and response
Question
dig mx.newscpt20.de. NS
Answer
The response has no answer records.
Authority
newscpt20.de. 3600 SOA dns1.netways.de. hostmaster.netways.de. 2026020601 10800 1800 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0