_spf.promail.com.tr has no NS records.
NS records for this zone are defined at promail.com.tr.
NS records for this zone are defined at promail.com.tr.
Question and response
Question
dig _spf.promail.com.tr. NS
Answer
The response has no answer records.
Authority
promail.com.tr. 1800 SOA bob.ns.cloudflare.com. dns.cloudflare.com. 2399029931 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0