_pmta2.antevenio.com has no CNAME records.
Question and response
Question
dig _pmta2.antevenio.com. NS
Answer
The response has no answer records.
Authority
antevenio.com. 1432 SOA ns1.antevenio.com. sistemas.antevenio.com. 2025111209 28800 7200 2678400 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0