vucerd.gov.do has no MX records.
Question and response
Question
dig vucerd.gov.do. MX
Answer
The response has no answer records.
Authority
vucerd.gov.do. 3600 SOA sdq-dns01. hostmaster. 15 900 600 86400 3600
Additional
. 0 OPT ; payload 4000, xrcode 0, version 0, flags 0