Registro DMARC
v=spf1 include:spf2.esputnik.com include:servers.mcsv.net include:mail.zendesk.com ip4:208.82.16.0/22 ip4:8.6.19.94 a mx ~all

Registro IPv4
host: rvip15.g.cachefly.net
class: IN
ttl: 726
type: A
ip: 205.234.175.105

host: st4.ning.com
class: IN
ttl: 300
type: CNAME
target: st12storagening.cachefly.net