mx.homebuysplus.com has no NS records.
NS records for this zone are defined at homebuysplus.com.
NS records for this zone are defined at homebuysplus.com.
Question and response
Question
dig mx.homebuysplus.com. NS
Answer
The response has no answer records.
Authority
homebuysplus.com. 3600 SOA dns.homebuysplus.com. hostmaster.homebuysplus.com. 1558551311 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0