mail.padinet.com has no CNAME records.
Question and response
Question
dig mail.padinet.com. NS
Answer
The response has no answer records.
Authority
padinet.com. 48 SOA ns1.padinet.com. info.padinet.com. 2026022000 28800 7200 1209600 60
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0