enecoop.edu.do has no MX records.
Question and response
Question
dig enecoop.edu.do. MX
Answer
The response has no answer records.
Authority
enecoop.edu.do. 3601 SOA freedns1.registrar-servers.com. hostmaster.registrar-servers.com. 1762871619 43200 3600 604800 3601
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0