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