Registro DMARC
v=DMARC1; p=none; rua=mailto:postmaster@adamobrasil.com.br

Servidores DNS Principal (mname) y Secundario (rname)
host: adamobrasil.com.br
class: IN
ttl: 3600
type: SOA
mname: ns534.umbler.com
rname: admin.umbler.com
serial: 47
refresh: 1200
retry: 600
expire: 1209600
minimum-ttl: 3600