PHPmailer stopped working

My PHPmailer script on one of my websites is failing silently. I produces no errors and redirects to the succes page. I’m using a gmail-account that sends the emails for me but it does not show any send mails. this setup has worked in the past but just stop working. I have updated some of the programs on my server, but fail to see how that should produce this problem. Im using the same gmail account and same script from a other website hosted somewhere else and that one works. I have already updated PHPmailer to the latest version but no luck. Out of ideas. :(


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    require_once dirname(__FILE__).'/vendor/PHPMailerAutoload.php';

    //require_once dirname(__FILE__).'/vendor/class.smtp.php';

    if( isset( $_POST ) ){

        $date              = $_POST['date'];
        $name              = $_POST['naam'];
        $aantal_personen   = $_POST['aantal_personen'];
        $email             = $_POST['email'];
        $telefoonnummer    = $_POST['telefoonnummer'];
        $extra             = $_POST['extra'];

        $message .= "<p>Naam van groep: {$name}</p>";
        $message .= "<p>Aantal personen: {$aantal_personen}</p>";
        $message .= "<p>Datum van vaart: {$date}</p>";
        $message .= "<p>e-mail: {$email}</p>";
        $message .= "<p>Telefoonnummer: {$telefoonnummer}</p>";
        $message .= "<p>Extra info: {$extra}</p>";

        $mail = new PHPMailer(true);

       $options = array(
    'ssl' => array(
        'verify_peer' => false,
        'verify_peer_name' => false,
        'allow_self_signed' => true
//Tell PHPMailer to use SMTP

//Enable SMTP debugging
// 0 = off (for production use)
// 1 = client messages
// 2 = client and server messages
$mail->SMTPDebug = 2;

//Ask for HTML-friendly debug output
$mail->Debugoutput = 'html';

//Set the hostname of the mail server
$mail->Host = '';

//Set the SMTP port number - 587 for authenticated TLS, a.k.a. RFC4409 SMTP submission
$mail->Port = 587;

//Set the encryption system to use - ssl (deprecated) or tls
$mail->SMTPSecure = 'tls';

//Whether to use SMTP authentication
$mail->SMTPAuth = true;

//Username to use for SMTP authentication - use full email address for gmail
$mail->Username = "";

//Password to use for SMTP authentication
$mail->Password = "password";

        #$mail->FromName = ;

        //Naar wie moet de mail gestuurd worden

        $mail->addReplyTo( $email );

        $mail->setFrom('','Rederij Wolthuis');

        $mail->isHTML( true );
        $mail->Subject = "Reservering Pannenkoekenboot op {$date} naam: {$name}";
        $mail->Body= $message;

        if( !$mail->send() ){
                <div class='niet_verzonden'>Er is een fout opgetreden met het versturen van uw boeking.</div>
                <div class='error'><? echo $mail->ErrorInfo; ?></div>




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Insecure apps are premitted. Thanks for the link.

it is possible to setup postfix to use your gmail account, but even if you do not want to do that browse this article:

…note the settings you want to do in gmail to allow insecure apps. It is a possible culprit