mx.forticlint.com has no NS records.
NS records for this zone are defined at forticlint.com.
NS records for this zone are defined at forticlint.com.
Question and response
Question
dig mx.forticlint.com. NS
Answer
The response has no answer records.
Authority
forticlint.com. 3600 SOA dns.forticlint.com. hostmaster.forticlint.com. 1760865429 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0