smtp.parfax.com has no NS records.
NS records for this zone are defined at parfax.com.
NS records for this zone are defined at parfax.com.
Question and response
Question
dig smtp.parfax.com. NS
Answer
The response has no answer records.
Authority
parfax.com. 300 SOA x.ns.joker.com. hostmaster.joker.com. 2024011863 14400 3600 1209600 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0