Email Formats
{
"mx": [
"10 us-smtp-inbound-1.mimecast.com.",
"20 us-smtp-inbound-2.mimecast.com."
],
"spf": [
"v=spf1 include:us._netblocks.mimecast.com include:outboundmail.blackbaud.net include:spf.constantcontact.com ~all"
]
}