maildev.predictivetechnologies.com has no CNAME records.
Question and response
Question
dig maildev.predictivetechnologies.com. NS
Answer
The response has no answer records.
Authority
predictivetechnologies.com. 137 SOA ns0.dnsmadeeasy.com. dns.dnsmadeeasy.com. 2008010388 43200 3600 1209600 180
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0