邮件对象

{
    "user": "string",
    "recipientsTo": [
        "string"
    ],
    "recipientsCc": [
        "string"
    ],
    "recipientsBcc": [
        "string"
    ],
    "subject": "string",
    "sentDate": "string",
    "fromEmail": "string",
    "content": "string",
    "proxyInfo": "string"
}