smtp08.enbridge.com has no NS records.
NS records for this zone are defined at enbridge.com.
NS records for this zone are defined at enbridge.com.
Question and response
Question
dig smtp08.enbridge.com. NS
Answer
The response has no answer records.
Authority
enbridge.com. 1800 SOA blue.foundationdns.com. webpresence.enbridge.com. 2397905076 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0