front.mailpv.net has no CNAME records.
Question and response
Question
dig front.mailpv.net. NS
Answer
The response has no answer records.
Authority
mailpv.net. 3600 SOA ns1.viidakko.fi. admin.dnsimple.com. 1727955764 86400 7200 604800 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0