ns1.messagingengine.com has no CNAME records.
Question and response
Question
dig ns1.messagingengine.com. NS
Answer
The response has no answer records.
Authority
messagingengine.com. 1892 SOA fmns1.messagingengine.com. postmaster.messagingengine.com. 2026021600 86346 600 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0