mail.i-next.ws has no CNAME records.
Question and response
Question
dig mail.i-next.ws. NS
Answer
The response has no answer records.
Authority
ws. 10415 SOA ns2.dns.ws. hostmaster.dns.ws. 2603080003 86400 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0