relaypool01.pensomail.com.br has no CNAME records.
Question and response
Question
dig relaypool01.pensomail.com.br. NS
Answer
The response has no answer records.
Authority
pensomail.com.br. 1200 SOA ns1.penso.com.br. hostmaster.penso.com.br.pensomail.com.br. 2026030401 7200 3600 172800 1200
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0