express-mail._domainkey.netflowservices.com has no NS records.
NS records for this zone are defined at netflowservices.com.
NS records for this zone are defined at netflowservices.com.
Question and response
Question
dig netflowservices.com.dkim.express-mail.com. NS
Answer
The response has no answer records.
Authority
express-mail.com. 300 SOA x.ns.joker.com. hostmaster.joker.com. 2026031757 14400 3600 1209600 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0