outbound20.uzmanposta.com has no CNAME records.
Question and response
Question
dig outbound20.uzmanposta.com. NS
Answer
The response has no answer records.
Authority
uzmanposta.com. 3366 SOA ns1.dnssunucu.com. hostmaster.pusula.net.tr. 2023121801 10800 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0