postmail.tmsoft.com.br has no CNAME records.
Question and response
Question
dig postmail.tmsoft.com.br. NS
Answer
The response has no answer records.
Authority
tmsoft.com.br. 3600 SOA ns1.udns.com.br. contato.tmsoft.com.br. 2026010522 3600 600 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0