PHP联系表单不发送到电子邮件

Question

这是PHP，我认为它是正确的，但它不会将表单发送到它上面的电子邮件         

    $emailSubject = 'Rayykz has recruited a channel!';
    $email_to = 'support@breeze-studios.com';

/* Gathering Data Variables */


    $name = $_POST['name'];
    $email = $_POST['email'];
    $username = $_POST['username'];

    $body = <<<EOD
<br><hr><br>
Name: $name <br>
Email: $email <br>
Username:$username
EOD;

    $headers = "From: $email\r\n";
    $headers .="Content-type: text/html\r\n";
    $success = mail($email_to, $emailSubject, $body, $headers);

这是与之相关的表格

<form action="rayykz.php" method="post" role="form">
                <div class="form-group">
                  <label>Name</label>
                  <input name="name" class="form-control" id="name">
                </div>
                <div class="form-group">
                  <label>Email</label>
                  <input name="email" class="form-control" id="email" placeholder="Enter text">
                </div>
                <div class="form-group">
                  <label>Username</label>
                  <input name="username" type="text" class="form-control" value="" id="username">
                  <p class="help-block">Example "BreezeYTube".</p>               
                </div>
                <div class="form-group">
                </div>
<button type="submit" class="btn btn-default">Submit Channel</button>
                <button type="reset" class="btn btn-default">Reset Form</button>
              </form>

表单不会发送到电子邮件地址，任何人都可以看到错误吗？