Why phpmailer is not sending mail to my domain mail server

Question

I'm trying to send mail to my domain mail server: I used a try{} catch(){} to detect if there is any error, but surprisingly, there isn't any error.

<?php 
function Redirect_to($New_Location){
    header("Location:" . $New_Location);
    exit;
}
if(isset($_POST['Submitenq'])){
    require('phpmailer/PHPMailerAutoload.php');

    define ('GUSER','[email protected]');
    define ('GPWD','mymailpass');

    $recever1 = '[email protected]';

    $enq_name = $_POST["enq_name"];
    $enq_email = $_POST["enq_email"];
    $enq_phone = $_POST["enq_phone"];
    $enq_message = $_POST["enq_message"];

    date_default_timezone_set("Asia/Kolkata");
    $CurrentTime = time();
    $DateTime = strftime("%B-%d-%Y %H:%M:%S",$CurrentTime);
    
    if(empty($enq_name) || empty($enq_email) || empty($enq_phone) || empty($enq_message)){
        Redirect_to("index.php?error=1");
    }else{
        $mail = new PHPMailer();
        try{
            $mail->IsSMTP();
            $mail->Mailer = "smtp";
                // $mail->SMTPDebug  = 2; 
            $mail->SMTPAuth   = TRUE;
            $mail->SMTPSecure = "ssl";
            $mail->Port       = 465;
            $mail->Host       = "mail.supremecluster.com";
            // $mail->CharSet   = "UTF-8";
            $mail->Username   = GUSER;
            $mail->Password   = GPWD;
            $mail->isHTML(true); 
                $mail->setFrom($enq_email,$enq_name);
                $mail->addAddress($recever1);
        
              $mail->Subject = 'Enquery Mail from - '. $enq_name;
              $mail->Body = '<table class="table" cellspacing="0">
              <thead>
                <tr>
                    <th colspan="2">Enquery Mail from - '. $enq_name .'</th>
                </tr>
              </thead>
              <tbody>
                <tr>
                    <td colspan="2">'. '<p>Dear Sir / Madam, I have some enqueries as follows :</p></br>' .'</td>
                </tr>
                <tr>
                    <td>Email:</td>
                    <td>'. $enq_email .'</td>
                </tr>
                <tr>
                    <td>Phone No:</td>
                    <td>'. $enq_phone .'</td>
                </tr>
                <tr>
                    <td>City:</td>
                    <td>'. $sendercity .'</td>
                </tr>
                <tr>
                    <td>Message:</td>
                    <td>'. $enq_message .'</td>
                </tr>
                <tr>
                    <td>Date of Enquery:</td>
                    <td>'. $DateTime .'</td>
                </tr>
              </tbody>
              </table>';
              
              $mail->send();
              $success_msg =  "Your Message Sent Successfully: ";
        }catch(phpmailerException $e){
            echo $e->errorMessage();
        }catch(Exception $e){
            echo $e->getMessage();
        }

    }

}

?>
<?php include 'header.php'; ?>

<div style="height:50vh;margin-top: 268px; background:#ddd;" class="d-flex justify-content-center align-items-center">
    <?php 
        if(isset($success_msg)){
    ?>
    <div class="alert alert-success" role="alert">

        <?php
            echo $success_msg . $enq_name;
        ?>
    </div>
    <?php
        }else{
    ?>
    <div class="alert alert-danger" role="alert">
<?php
    echo "Something went wrong";

?>
</div>
    <?php
        }
    ?>
</div>

<?php include 'footer.php'; ?>

It's showing me that the email sent successfully, but I'm not getting any mail.

I've contacted my server helpline, they're saying that certain IPs were blocked. But now I've allowed these IPs from the CPanel. But still, the mails are not sent

I really need help on this :)

Thanks for taking the time to read.

Answer 1

PHPMailer doesn't throw exceptions by default – you have to ask for them by passing true to the constructor, as in $mail = new PHPMailer(true);. Without that you have to check the return values from methods like send() to find out if they worked.

Errors are stored in the ErrorInfo property – see any of the code examples provided with PHPMailer to see how to handle errors correctly.

You can also set $mail->SMTPDebug = 2; to see what your mail server is saying. Beyond that, read the PHPMailer troubleshooting guide.