Laravel来自SendGrid的错误请求

Question

好的，我尝试使用它们提供给我的API一起设置Laravel和SendGrid，但无论如何，我总是收到错误提示

  

客户端错误：POST https://api.sendgrid.com/v3/mail/send导致   400 Bad Request的回复：{“错误”：[{“消息”：“错误   请求”，“字段”：null，“帮助”：null}]}

我尝试使用另一个API密钥，但我一直收到完全相同的错误。

$endpoint = "https://api.sendgrid.com/v3/mail/send";
    $client = new \GuzzleHttp\Client();

    $headers = [
        'Authorization' => 'Bearer MY_API_KEY', //of course, I removed my real API key
        'Accept'        => 'application/json',
        'content-type' => 'application/json'
    ];

    $zData = [
        "personalizations"=>  [
        [
            "to"=>  [
            [
                "email"=> "myemail@gmail.com" // I used my private Gmail account 
            ]
          ],
          "subject"=>  "Hello, World!"
        ]
      ],
      "from"=>  [
            "email"=>  "myemail@gmail.com" //here I used my another personal gmail account
      ],
      "content"=>  [
        [
            "type"=>  "text/plain",
            "value"=>  "Hello, World!"
        ]
      ]  
    ];



    $response = $client->request('POST', $endpoint, [
        'headers' => $headers,
        $zData
    ]);