{
    "$schema": "http://json-schema.org/draft-04/schema#",
    "type": "object",
    "properties": {
        "messages": {
            "type": "array",
            "items": {
                "type": "object",
                "properties": {
                    "messageId": {
                        "type": "integer"
                    },
                    "receivedDate": {
                        "type": "integer"
                    },
                    "senderEmail": {
                        "type": "string"
                    },
                    "recipients": {
                        "type": "string"
                    },
                    "subject": {
                        "type": "string"
                    },
                    "hasAttachments": {
                        "type": "boolean"
                    }
                },
                "required": [
                    "messageId",
                    "receivedDate",
                    "senderEmail",
                    "recipients",
                    "subject",
                    "hasAttachments"
                ]
            }
        }
    },
    "required": [
        "messages"
    ]
}