mail.compax.at has no CNAME records.
Question and response
Question
dig mail.compax.at. NS
Answer
The response has no answer records.
Authority
compax.at. 3587 SOA dns2.a1.net. domainadmin.a1.net. 2026021000 10800 3600 1814400 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0