securemail.seppmaildemo.net has no CNAME records.
Question and response
Question
dig securemail.seppmaildemo.net. NS
Answer
The response has no answer records.
Authority
seppmaildemo.net. 31 SOA ns1.itmnetx.com. do-not-reply.seppmaildemo.net. 2025121800 43200 7200 1209600 60
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0