mx.titoedwards.com has no NS records.
NS records for this zone are defined at titoedwards.com.
NS records for this zone are defined at titoedwards.com.
Question and response
Question
dig mx.titoedwards.com. NS
Answer
The response has no answer records.
Authority
titoedwards.com. 3600 SOA dns.titoedwards.com. hostmaster.titoedwards.com. 1461182989 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0