Email Formats
{
"mx": [
"0 us-smtp-inbound-1.mimecast.com.",
"10 us-smtp-inbound-2.mimecast.com."
],
"spf": [
"include v=spf1 include:cust-spf.exacttarget.com",
"v=spf1 ip4:204.155.61.5 ip4:204.155.62.5 include:spf.protection.outlook.com include:us._netblocks.mimecast.com"
]
}