Email Formats
{
"mx": [
"10 usb-smtp-inbound-1.mimecast.com.",
"10 usb-smtp-inbound-2.mimecast.com."
],
"spf": [
"v=spf1 mx a include:usb._netblocks.mimecast.com include:spf.protection.outlook.com include:aspmx.pardot.com include:cust-spf.exacttarget.com include:_spf.salesforce.com ip4:3.210.51.128 ip4:3.220.34.214 ip4:34.196.246.149 ip4:18.235.120.154 -all"
]
}