Email Formats
{
"mx": [
"10 us-smtp-inbound-1.mimecast.com.",
"10 us-smtp-inbound-2.mimecast.com."
],
"spf": [
"v=spf1 ip4:172.109.244.164/32 ip4:47.206.227.203/32 ip4:216.55.187.143/32 include:outlook.com include:in.constantcontact.com include:us._netblocks.mimecast.com -all"
]
}