Email Formats
{
"mx": [
"10 usb-smtp-inbound-1.mimecast.com."
],
"spf": [
"v=spf1 mx include:_netblocks.google.com include:_netblocks2.google.com include:_netblocks3.google.com include:sendgrid.net include:spf1.cuofamerica.com include:_spf.elasticemail.com include:amazonses.com ~all"
]
}