trusted235aw.cloudsmtp.com.br has no NS records.
NS records for this zone are defined at cloudsmtp.com.br.
NS records for this zone are defined at cloudsmtp.com.br.
Question and response
Question
dig trusted235aw.cloudsmtp.com.br. NS
Answer
The response has no answer records.
Authority
cloudsmtp.com.br. 900 SOA ns-1583.awsdns-05.co.uk. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0