mx4.stadtwerkeallianz.com has no CNAME records.
Question and response
Question
dig mx4.stadtwerkeallianz.com. NS
Answer
The response has no answer records.
Authority
stadtwerkeallianz.com. 362 SOA dns1.wtnet.de. hostmaster.wtnet.de. 2025042802 3600 900 3600000 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0