ttnetdns.com.tr has no MX records.
Question and response
Question
dig ttnetdns.com.tr. MX
Answer
The response has no answer records.
Authority
ttnetdns.com.tr. 3600 SOA ns1.ttnetdns.com.tr. hostmaster.ttnet.com.tr. 26 900 600 86400 3600
Additional
. 0 OPT ; payload 4000, xrcode 0, version 0, flags 0