mail.bmsdns.eu has no CNAME records.
Question and response
Question
dig mail.bmsdns.eu. NS
Answer
The response has no answer records.
Authority
bmsdns.eu. 60 SOA ns1.virtualhosts.de. hostmaster.virtualhosts.de. 2025010705 14400 3600 604800 60
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0