使用itemAttachment创建消息

Question

尝试通过Microsoft Graph发送电子邮件，其中来自用户邮箱的另一封电子邮件将用作附件。

我正在做的事情类似于：

POST https://graph.microsoft.com/v1.0/me/sendMail HTTP/1.1
authorization: bearer {access_token}
content-type: application/json
content-length: 96

{
    "message": {
        "subject": "Meet for lunch?",
        "body": {
            "contentType": "Text",
            "content": "The new cafeteria is open."
        },
        "toRecipients": [{
            "emailAddress": {
                "address": "garthf@a830edad9050849NDA1.onmicrosoft.com"
            }
        }],
        "attachments": [
            "@odata.type": "#Microsoft.OutlookServices.ItemAttachment",
            "name": "menu.txt",
            "item": {
                "id": "some_id"
                <!--This is the id of an existing email in User's inbox -->
            }
        ]
    },
    "saveToSentItems": "false"
}

返回

  

无法处理抽象类型Microsoft.OutlookServices.Item

的输入

任何人都可以提供建议吗？