smtp6.gov1.qemailserver.com has no CNAME records.
Question and response
Question
dig smtp6.gov1.qemailserver.com. NS
Answer
The response has no answer records.
Authority
qemailserver.com. 600 SOA pdns111.ultradns.com. hostmaster.qualtrics.com. 1772627213 3600 600 1209600 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0