Email Formats
{
"mx": [
"0 us-smtp-inbound-1.mimecast.com.",
"0 us-smtp-inbound-2.mimecast.com."
],
"spf": [
"v=spf1 a mx include:us._netblocks.mimecast.com ip4:209.16.113.3 ip4:209.16.113.5 ip4:209.16.113.6 ip4:209.16.113.7 ip4:209.16.113.8 ~all"
]
}