spf.emlsend.com has no NS records.
NS records for this zone are defined at emlsend.com.
NS records for this zone are defined at emlsend.com.
Question and response
Question
dig spf.emlsend.com. NS
Answer
The response has no answer records.
Authority
emlsend.com. 180 SOA ns0.dnsmadeeasy.com. dns.dnsmadeeasy.com. 2008010318 43200 3600 1209600 180
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0