Registro DMARC
v=DMARC1; p=none; sp=none; adkim=r; aspf=r

Servidores DNS Principal (mname) y Secundario (rname)
host: alfaworld.net
class: IN
ttl: 10800
type: SOA
mname: ns.abdns.biz
rname: postmaster.arubabusiness.it
serial: 2025090929
refresh: 10800
retry: 3600
expire: 1209600
minimum-ttl: 3600