ns2.send.ee has no MX records.
Question and response
Question
dig ns2.send.ee. MX
Answer
The response has no answer records.
Authority
send.ee. 3600 SOA ns1.send.ee. hostmaster.send.ee. 2026010800 3600 900 360000 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0