mail.balboatech.com has no CNAME records.
Question and response
Question
dig mail.balboatech.com. NS
Answer
The response has no answer records.
Authority
balboatech.com. 3515 SOA ns1.balboatech.com. operations.ebm-radio.com. 2026030101 10800 3600 1209600 10800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0