Email Formats
{
"mx": [
"10 us-smtp-inbound-2.mimecast.com.",
"10 us-smtp-inbound-1.mimecast.com."
],
"spf": [
"v=spf1 ip4:64.159.139.40/29 ip4:50.217.72.36/30 ip4:50.217.72.56/29 include:us._netblocks.mimecast.com include:spf.constantcontact.com include:simplelists.com -all"
]
}