请放心在发送电子邮件api中附加文档

Question

这是我的回复：

{
    "Message360": {
        "ResponseStatus": 0,
        "Errors": {
            "Error": [
                {
                    "Code": "ER-M360-EML-109",
                    "Message": "Attachment's file extension is not allowed.",
                    "MoreInfo": []
                },
                {
                    "Code": "ER-M360-EML-108",
                    "Message": "Attachment size must be up to 7 MB.",
                    "MoreInfo": []
                }
            ]
        }
    }
}

我还尝试了使用multipart，但它不起作用，请提供任何帮助？