Question and response
Question
dig mailserver2.cetelem.com.br. DNAME
Answer
The response has no answer records.
Authority
cetelem.com.br. 300 SOA ns1.cetelem.com.br. microinformatica.cetelem.com.br. 1202 7200 3600 604800 300
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0