ml02email.mta.rogers.com has no NS records.
NS records for this zone are defined at mta.rogers.com.
NS records for this zone are defined at mta.rogers.com.
Question and response
Question
dig ml02email.mta.rogers.com. NS
Answer
The response has no answer records.
Authority
mta.rogers.com. 900 SOA pub1-master1-iblox-wlfdle.mgmt.net.rogers.com. cnrbacc.rci.rogers.com. 2017030304 10800 3600 2419200 900
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0