mx.rafaeljuliana.com has no NS records.
NS records for this zone are defined at rafaeljuliana.com.
NS records for this zone are defined at rafaeljuliana.com.
Question and response
Question
dig mx.rafaeljuliana.com. NS
Answer
The response has no answer records.
Authority
rafaeljuliana.com. 3600 SOA dns.rafaeljuliana.com. hostmaster.rafaeljuliana.com. 1567884558 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0