mxbackup1.junkemailfilter.com has no NS records.
NS records for this zone are defined at junkemailfilter.com.
NS records for this zone are defined at junkemailfilter.com.
Question and response
Question
dig mxbackup1.junkemailfilter.com. NS
Answer
The response has no answer records.
Authority
junkemailfilter.com. 7200 SOA ns.reality-dns.com. dns.reality-dns.com. 2024083000 28800 900 604800 7200
Additional
. 0 OPT ; payload 2800, xrcode 0, version 0, flags 0