Email Formats
{
"mx": [
"10 filter1.hornsb-3.mailguard.com.au.",
"20 filter2.hornsb-3.mailguard.com.au.",
"30 filter3.hornsb-3.mailguard.com.au."
],
"spf": [
"v=spf1 ip4:220.233.65.71 include:customer.mailguard.com.au include:gcast.com.au -all"
]
}