dqecomm.mail.pairserver.com has no CNAME records.
Question and response
Question
dig dqecomm.mail.pairserver.com. NS
Answer
The response has no answer records.
Authority
pairserver.com. 2511 SOA ns1.pair.com. root.pair.com. 2026022709 3600 300 604800 7200
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0