spf2.enginemailer.net has no NS records.
NS records for this zone are defined at enginemailer.net.
NS records for this zone are defined at enginemailer.net.
Question and response
Question
dig spf2.enginemailer.net. NS
Answer
The response has no answer records.
Authority
enginemailer.net. 3600 SOA dns126.a.register.com. root.register.com. 2018032345 28800 7200 604800 3600
Additional
. 0 OPT ; payload 1680, xrcode 0, version 0, flags 0