177-53-180-66.atsfibra.com.br has no MX records.
Question and response
Question
dig 177-53-180-66.atsfibra.com.br. MX
Answer
The response has no answer records.
Authority
atsfibra.com.br. 86400 SOA ns1.atsfibra.com.br. noc.atsfibra.com.br. 2025101701 10800 3600 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0