Email Formats
{
"mx": [
"10 us-smtp-inbound-1.mimecast.com.",
"10 us-smtp-inbound-2.mimecast.com."
],
"spf": [
"v=spf1 ip4:72.32.143.172 ip4:98.129.5.251 ip4:50.56.137.71 include:_netblocks.mimecast.com include:_spf.bullhornmail.com ~all"
]
}