cbb1.grupofortaleza.com.bo has no MX records.
Question and response
Question
dig cbb1.grupofortaleza.com.bo. MX
Answer
The response has no answer records.
Authority
grupofortaleza.com.bo. 600 SOA ns.grupofortaleza.com.bo. root.lpz.grupofortaleza.com.bo. 2017012870 10800 3600 1209600 600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0