mx0.parallax.ws has no CNAME records.
Question and response
Question
dig mx0.parallax.ws. NS
Answer
The response has no answer records.
Authority
parallax.ws. 904 SOA ns1.parallax.ws. administrator.parallax.ws. 2025082202 3600 600 86400 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0