ns01.webpa.com.br has no MX records.
Question and response
Question
dig ns01.webpa.com.br. MX
Answer
The response has no answer records.
Authority
webpa.com.br. 86400 SOA ns01.webpa.com.br. suporte.interconect.net.br. 2018100104 3600 7200 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0