spamkas.minedu.gob.bo has no MX records.
Question and response
Question
dig spamkas.minedu.gob.bo. MX
Answer
The response has no answer records.
Authority
minedu.gob.bo. 8600 SOA server.minedu.gob.bo. root.minedu.gob.bo. 2702202602 3200 1800 10800 8600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0