mail.consultisp.com.br has no MX records.
Question and response
Question
dig mail.consultisp.com.br. MX
Answer
The response has no answer records.
Authority
consultisp.com.br. 300 SOA ns1.consultisp.com.br. noc.consultisp.com.br. 2025110310 3600 900 1209600 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0