reply.emails.markerstudy.com has no CNAME records.
Question and response
Question
dig reply.emails.markerstudy.com. NS
Answer
The response has no answer records.
Authority
emails.markerstudy.com. 3162 SOA ns1.namecity.com. hostmaster.namecity.com. 2025112700 43200 1800 2419200 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0