mx.ehalifax.com has no NS records.
NS records for this zone are defined at ehalifax.com.
NS records for this zone are defined at ehalifax.com.
Question and response
Question
dig mx.ehalifax.com. NS
Answer
The response has no answer records.
Authority
ehalifax.com. 3600 SOA dns.ehalifax.com. hostmaster.ehalifax.com. 1654717460 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0