mail.gyroserver3.com has no CNAME records.
Question and response
Question
dig mail.gyroserver3.com. NS
Answer
The response has no answer records.
Authority
gyroserver3.com. 9616 SOA ns1.gyroserver3.com. info.gyro.cloud. 2024091101 10800 3600 1209600 10800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0