qsmtp.metricstream.com has no CNAME records.
Question and response
Question
dig qsmtp.metricstream.com. NS
Answer
The response has no answer records.
Authority
metricstream.com. 854 SOA elle.ns.cloudflare.com. dns.cloudflare.com. 2398198122 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0