PHP：未收到联系表单邮件

Question

我知道这个问题已经被多次询问。我需要有人检查为什么该应用程序显示成功消息，但是我的邮件中没有收到任何邮件。这是我的代码：

<?php
require_once 'includes/helpers.php';
require 'includes/headerlinks.php';

$fullname = ((isset($_POST['fullname']) && !empty($_POST['fullname']))?sanitize($_POST['fullname']):'');
$phone = ((isset($_POST['phone']) && !empty($_POST['phone']))?sanitize($_POST['phone']):'');
$email = ((isset($_POST['email']) && !empty($_POST['email']))?sanitize($_POST['email']):'');
$message = ((isset($_POST['mmessage']) && !empty($_POST['mmessage']))?sanitize($_POST['mmessage']):'');

$errors = array();
$successes = array();  

if ($_SERVER['REQUEST_METHOD'] == 'POST'){
    if (isset($_POST['sendMessageButton'])){    
        $required = array('fullname', 'phone', 'email', 'mmessage');

        foreach($required as $field){            
            if($_POST[$field] === ''){
                $errors[] .= 'All fields with an asterisk (*) are required.';
                break;
            }
        }

        //Display error or update database
        if(!empty($errors)){
            //Display Errors
            $display = display_errors($errors); ?>
            <script>
                jQuery('document').ready(function(){
                   jQuery('#errors').html('<?= $display; ?>');
                });
            </script>             
        <?php } else {
            $to = "contact@dizasworldbeautycollege.com";
            $subject = "Message from DWBC website Send by " . $fullname;
            $body = "Name of Sender: " . $fullname . "<br />";
            $body .= "Phone Number: " . $phone . "<br />";
            $body .= "Email Address: " . $email . "<br />";
            $body .= "Message: " . $message;
            $headers = "From: " . $email . "/r/n";
            $headers .= "Mime-Version: 1.0/r/n";
            $headers .= "Content-Type: text/html; charset=utf-8/r/n";

            if(mail($to, $subject, $body, $headers)){
                $successes[] .= "Your email has been sent. Thank you!";
                if(!empty($successes)){
                    //Display Errors
                    $display = display_success($successes); ?>
                    <script>
                        jQuery('document').ready(function(){
                           jQuery('#errors').html('<?= $display; ?>');
                        });
                    </script>             
                <?php }
            }
            else {
                 $errors[] .= "Sending failed! Please try again.";
                if(!empty($errors)){
                    //Display Errors
                    $display = display_errors($errors); ?>
                    <script>
                        jQuery('document').ready(function(){
                           jQuery('#errors').html('<?= $display; ?>');
                        });
                    </script>             
                <?php }
            }
        }           
    }
}

？>

我尝试将个人电子邮件中的邮件发送到contact@dizasworldbeautycollege.com，该邮件已成功发送和接收。因此，我已经排除了服务器配置。该网站托管在godaddy Linux服务器上。