mxbackup1.junkemailfilter.com has no AAAA records.
Question and response
Question
dig mxbackup1.junkemailfilter.com. AAAA
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