AWS CloudFormation Route53 MX record example

r53-mx-example.json

{
  "Resources": {
    "ExampleMXRecord": {
      "Type": "AWS::Route53::RecordSet",
      "Properties": {
        "HostedZoneName": "example.com.",
        "Comment": "My Example MX Record",
        "Name": "example.com.",
        "Type": "MX",
        "TTL": "600",
        "ResourceRecords": [
          "10 mail1.example.com",
          "20 inbound-smtp.us-west-2.amazonaws.com."
        ]
      }
    }
  }
}

Thanks @DanielBoa