mail2.ro.soehnergroup.com has no CNAME records.
Question and response
Question
dig mail2.ro.soehnergroup.com. NS
Answer
The response has no answer records.
Authority
soehnergroup.com. 272 SOA ns1027.ui-dns.de. hostmaster.schlund.de. 2017050543 28800 7200 604800 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0