ns2.crnagora.net has no MX records.
Question and response
Question
dig ns2.crnagora.net. MX
Answer
The response has no answer records.
Authority
crnagora.net. 300 SOA ns.t-com.me. hostmaster.t-com.me. 2010101108 10800 3600 604800 36000
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0