mailserver.aowin.com.br has no TXT records.
Question and response
Question
dig mailserver.aowin.com.br. TXT
Answer
The response has no answer records.
Authority
aowin.com.br. 3600 SOA ns1.gegnet.net.br. suporte.gegnet.net.br. 2025021081 3600 3600 86400 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0