mail.form.a.forwardy.net has no CNAME records.
Question and response
Question
dig mail.form.a.forwardy.net. NS
Answer
The response has no answer records.
Authority
form.a.forwardy.net. 585 SOA ns4.form.a.forwardy.net. end+rs.nhn-techorus.com. 2026011001 10800 3600 1209600 10800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0