mx50.moedelo.org has no MX records.
Question and response
Question
dig mx50.moedelo.org. MX
Answer
The response has no answer records.
Authority
moedelo.org. 900 SOA ns3-l2.nic.ru. admin.moedelo.org. 2018110837 14400 3600 1209600 14400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0