Email Formats
{
"mx": [
"10 us-smtp-inbound-1.mimecast.com.",
"10 us-smtp-inbound-2.mimecast.com."
],
"spf": [
"v=spf1 ip4:50.226.75.171 ip4:64.14.29.8 ip4:38.126.8.35 include:us._netblocks.mimecast.com include:_spf.salesforce.com include:spf.constantcontact.com include:mailgun.org -all"
]
}