title: SendGrid API V3 returns 400 Bad Request
body: <p>I am trying to achieve send of mail via <a href="https://sendgrid.com/docs/API_Reference/Web_API_v3/index.html" rel="noreferrer">SendGrid API</a>.</p>
  
  <p>Following is the JSON I am sending as a body of the POST Method</p>
  
  <pre><code>{
    "content" : [
      {
        "type" : "text\/plain",
        "value" : "Hello, World!"
      }
    ],
    "personalizations" : [
      {
        "to" : [
          {
            "email" : "sahpranav1712@gmail.com"
          }
        ],
        "subject" : "Hello, World!"
      }
    ],
    "from" : {
      "email" : "iospranav1712@gmail.com"
    }
  }
  </code></pre>
  
  <p>and following is the return that I am getting</p>
  
  <pre><code>{"message":"Bad Request","field":null,"help":null}
  </code></pre>
  
  <p>This piece of info doesn't help much.</p>
  
  <p>The authorization is in place, and I believe correctly. </p>
  
  <p>Perhaps, I might have missed some sort of settings in the <a href="https://app.sendgrid.com/" rel="noreferrer">SendGrid App</a></p>
  
  <p>If it helps im using Objective-C.</p>
  
  <p>Please help!!</p>