Contact form successfully sending but preloader keeps spinning!

Hello SemiColonWeb,

I am having an issue with the contact form on this website:

http://www.aundb-group.de

The form works just fine. It sends out the email like it should
but somehow after hitting the send button the preloader appears
and stays until I refresh the browser window. No success message is shown either.

I disabled the recaptcha but no success on solving the issue.
When I move the site to a different server (it's the same provider and should be the same server settings)
it all works as expected.

Here's the link to the working contact form:

http://www.jumato.de/client/aundb/

It would be great if you could take a look at it.

Thanks.

` <div class="postcontent nobottommargin">
<div class="contact-widget">
<div class="contact-form-result"></div>
<form class="nobottommargin" id="template-contactform" name="template-contactform" method="post" action="include/sendemail.php">
<div class="form-process"></div>
<div class="col_one_third">
<label for="template-contactform-company">Firma </label>
<input type="text" id="template-contactform-company" name="template-contactform-company" value="" class="sm-form-control" />
</div>
<div class="col_one_third">
<label for="template-contactform-name">Vorname <small></small></label>
<input type="text" id="template-contactform-name" name="template-contactform-name" value="" class="required name sm-form-control" />
</div>
<div class="col_one_third col_last">
<label for="template-contactform-lastname">Nachname <small></small></label>
<input type="text" id="template-contactform-lastname" name="template-contactform-lastname" value="" class="required lastname sm-form-control" />
</div>
<div class="clear"></div>
<div class="col_half">
<label for="template-contactform-email">Email <small></small></label>
<input type="email" id="template-contactform-email" name="template-contactform-email" value="" class="required email sm-form-control" />
</div>
<div class="col_half col_last">
<label for="template-contactform-phone">Telefon <small></small></label>
<input type="text" id="template-contactform-phone" name="template-contactform-phone" value="" class="required phone sm-form-control" />
</div>
<div class="col_full">
<label for="template-contactform-subject">Betreff <small></small></label>
<input type="text" id="template-contactform-subject" name="template-contactform-subject" value="" class="required sm-form-control" />
</div>
<div class="clear"></div>
<div class="col_full">
<label for="template-contactform-message">Ihre Nachricht <small></small></label>
<textarea class="required sm-form-control" id="template-contactform-message" name="template-contactform-message" rows="6" cols="30"></textarea>
</div>
<div class="col_full">
<button class="button nomargin" type="submit" id="template-contactform-submit" name="template-contactform-submit" value="submit">Nachricht senden</button>
</div>
<div class="clear"></div>
<div class="col_full hidden">
<input type="text" id="template-contactform-botcheck" name="template-contactform-botcheck" value="" class="sm-form-control" />
</div>
<div class="col_full">
<script src="https://www.google.com/recaptcha/api.js" async defer></script>
<div class="g-recaptcha" data-sitekey="6LcxzyMUAAAAAKwxIhRvc_H-SgMudLPitRt_12Q8"></div>
</div>
</form>
</div>
</div>

And here is the sendemail file:

`<?php

require_once('phpmailer/PHPMailerAutoload.php');

$toemails = array();

$toemails[] = array(
'email' => 'tobi.ruettger@googlemail.com', // Your Email Address
'name' => 'A&B Group' // Your Name
);

// Form Processing Messages
$message_success = 'Vielen Dank. Wir haben ihre Nachricht erfolgreich erhalten.';

// Add this only if you use reCaptcha with your Contact Forms
$recaptcha_secret = '6LcxzyMUAAAAAL58bxqJv55jbZoyLn-162wMBUkt'; // Your reCaptcha Secret

$mail = new PHPMailer();

// If you intend you use SMTP, add your SMTP Code after this Line

if( $_SERVER['REQUEST_METHOD'] == 'POST' ) {
if( $_POST['template-contactform-email'] != '' ) {

	$company = isset( $_POST['template-contactform-company'] ) ? $_POST['template-contactform-company'] : '';
	$name = isset( $_POST['template-contactform-name'] ) ? $_POST['template-contactform-name'] : '';
	$lastname = isset( $_POST['template-contactform-lastname'] ) ? $_POST['template-contactform-lastname'] : '';
	$email = isset( $_POST['template-contactform-email'] ) ? $_POST['template-contactform-email'] : '';
	$phone = isset( $_POST['template-contactform-phone'] ) ? $_POST['template-contactform-phone'] : '';
	$subject = isset( $_POST['template-contactform-subject'] ) ? $_POST['template-contactform-subject'] : '';
	$message = isset( $_POST['template-contactform-message'] ) ? $_POST['template-contactform-message'] : '';

	$subject = isset($subject) ? $subject : 'Neue Nachricht vom Kontaktformular';

	$botcheck = $_POST['template-contactform-botcheck'];

	if( $botcheck == '' ) {

		$mail->SetFrom( $email , $name );
		$mail->AddReplyTo( $email , $name );
		foreach( $toemails as $toemail ) {
			$mail->AddAddress( $toemail['email'] , $toemail['name'] );
		}
		$mail->Subject = $subject;

		$company = isset($company) ? "Firma: $company<br><br>" : '';
		$name = isset($name) ? "Vorname: $name<br><br>" : '';
		$lastname = isset($lastname) ? "Nachname: $lastname<br><br>" : '';
		$email = isset($email) ? "Email: $email<br><br>" : '';
		$phone = isset($phone) ? "Telefonnummer: $phone<br><br>" : '';
		$subject = isset($subject) ? "Betreff: $subject<br><br>" : '';
		$message = isset($message) ? "Nachricht: $message<br><br>" : '';

		$referrer = $_SERVER['HTTP_REFERER'] ? '<br><br><br>This Form was submitted from: ' . $_SERVER['HTTP_REFERER'] : '';

		$body = "$company $name $lastname $email $phone $subject $message $referrer";

		// Runs only when File Field is present in the Contact Form
		if ( isset( $_FILES['template-contactform-file'] ) && $_FILES['template-contactform-file']['error'] == UPLOAD_ERR_OK ) {
			$mail->IsHTML(true);
			$mail->AddAttachment( $_FILES['template-contactform-file']['tmp_name'], $_FILES['template-contactform-file']['name'] );
		}

		// Runs only when reCaptcha is present in the Contact Form
		if( isset( $_POST['g-recaptcha-response'] ) ) {
			$recaptcha_response = $_POST['g-recaptcha-response'];
			$response = file_get_contents( "https://www.google.com/recaptcha/api/siteverify?secret=" . $recaptcha_secret . "&response=" . $recaptcha_response );

			$g_response = json_decode( $response );

			if ( $g_response->success !== true ) {
				echo '{ "alert": "error", "message": "Bitte bestätigen Sie dass Sie kein Roboter sind." }';
				die;
			}
		}

		// Uncomment the following Lines of Code if you want to Force reCaptcha Validation

		// if( !isset( $_POST['g-recaptcha-response'] ) ) {
		// 	echo '{ "alert": "error", "message": "Captcha not Submitted! Please Try Again." }';
		// 	die;
		// }

		$mail->MsgHTML( $body );
		$mail->CharSet="UTF-8";
		$sendEmail = $mail->Send();

		if( $sendEmail == true ):
			echo '{ "alert": "success", "message": "' . $message_success . '" }';
		else:
			echo '{ "alert": "error", "message": "Ihre Nachricht konnte auf Grund eines **Fehlers** nicht gesendet werden. Bitte versuchen Sie es später noch einmal.<br /><br />**Reason:**<br />' . $mail->ErrorInfo . '" }';
		endif;
	} else {
		echo '{ "alert": "error", "message": "Bot **Detected**.! Clean yourself Botster.!" }';
	}
} else {
	echo '{ "alert": "error", "message": "Bitte **füllen Sie alle Pflichtfelder aus**." }';
}

} else {
echo '{ "alert": "error", "message": "Ein Fehler ist aufgetreten. Bitte versuchen Sie es erneut." }';
}

?>