ora001-e.jsmtp.net has no CNAME records.
Question and response
Question
dig ora001-e.jsmtp.net. NS
Answer
The response has no answer records.
Authority
jsmtp.net. 180 SOA ns11.constellix.com. dns.constellix.com. 2015010157 43200 3600 1209600 180
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0