ns2.bnet.net.tr has no MX records.
Question and response
Question
dig ns2.bnet.net.tr. MX
Answer
The response has no answer records.
Authority
bnet.net.tr. 900 SOA dnx1.vodafone.net.tr. dnsadmin.bnet.net.tr. 2020011428 10800 3600 2419200 900
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0