spf1.smartemailing.cz has no NS records.
NS records for this zone are defined at smartemailing.cz.
NS records for this zone are defined at smartemailing.cz.
Question and response
Question
dig spf1.smartemailing.cz. NS
Answer
The response has no answer records.
Authority
smartemailing.cz. 1800 SOA becky.ns.cloudflare.com. dns.cloudflare.com. 2398879450 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0