mx.webappkwidsoft.info has no CNAME records.
Question and response
Question
dig mx.webappkwidsoft.info. NS
Answer
The response has no answer records.
Authority
webappkwidsoft.info. 3547 SOA dns.webappkwidsoft.info. hostmaster.webappkwidsoft.info. 1667301941 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0