mail.phrixos.com has no CNAME records.
Question and response
Question
dig mail.phrixos.com. NS
Answer
The response has no answer records.
Authority
phrixos.com. 12 SOA ns1.domainers.de. hostmaster.internetwire.de. 2025082401 600 7200 604800 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0