securemail.sepp-mail.eu has no CNAME records.
Question and response
Question
dig securemail.sepp-mail.eu. NS
Answer
The response has no answer records.
Authority
sepp-mail.eu. 60 SOA ns1.itmnetx.com. do-not-reply.sepp-mail.eu. 2025110302 43200 7200 1209600 60
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0