fmail2.teol.net has no CNAME records.
Question and response
Question
dig fmail2.teol.net. NS
Answer
The response has no answer records.
Authority
teol.net. 300 SOA ns1.teol.net. hostmaster.teol.net. 2026022601 21600 3600 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0