securemail-test.ivcert.net has no CNAME records.
Question and response
Question
dig securemail-test.ivcert.net. NS
Answer
The response has no answer records.
Authority
ivcert.net. 1359 SOA ns1.ivnosys.net. sistemas.ivnosys.com. 1770886836 7200 1800 1209600 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0