Not receiving mails even after successful POST - php

Question

I got a mailscript which works, I tested it before.
Now all of a sudden with the same code I am not receiving any mails, nor are other people.
I looked in spam and inbox on both outlook and gmail.
This is my mail script:
<?PHP
require_once ('config.php');
require_once("../phpMailer/class.phpmailer.php");
$isValid = true;
if(isset($_POST['name']) && isset($_POST['subject']) && isset($_POST['email']) && isset($_POST['message']))
{
$name = $_POST['name'];
$subject = 'Er is een contact aanvraag op Kijk & Zie : '.$_POST['subject'];
$email = $_POST['email'];
$message = $_POST['message'];
$phone = $_POST['phone'];
$mail = new PHPMailer;
$mail->From = $email;
$mail->FromName = $name;
$mail->addAddress("receiver#live.nl"); // Add a recipient
$mail->isHTML(true); // Set email format to HTML
$mail->Subject = $subject;
$texts = 'Er is een aanvraag op de website van Kijk & Zie<br /> <br />
<b>Naam:</b> '.$name.'<br />
<b>E-mail adres:</b> '.$email.'<br />
<b>Onderwerp:</b> '.$subject.'<br />
<b>Telefoonnummer:</b>'.$phone.'<br />
<b>Vragen / Opmerkingen:</b> '.$message.'<br /><br /><br />
';
$handtekening = '
<table border="0" width="100%" cellspacing="0" cellpadding="0" style="font-family:calibri;color: #5C5C5C; font-size:10pt;line-height:22px;">
<tr>
<td width="160" valign="top" style="font-family:calibri;padding-left:10px;padding-top:20px;">
[contents]
</td>
</tr>
<tr>
<td width="160" valign="top" style="font-family:calibri;padding-left:10px;padding-top:20px;">
<br><br>Met vriendelijke groet,<br><br>
Helpdesk<br>
<b>Kijk & Zie</b><br>
<p></p>
</td>
</tr>
</table>
<table height="120" border="0" width="100%" cellspacing="0" cellpadding="0" style="font-family:calibri;color: #5C5C5C; font-size:10pt;line-height:22px;">
<tr>
<td width="250" valign="top" style="font-family:calibri;padding-left:10px;padding-top:20px;border-top: 1px #000000 dotted; border-bottom: 1px #000000 dotted;">
E:
info#website.nl<br>
T:
[phone]<br>
W:
www.website.nl<br>
</td>
<td align="right" style="font-family:calibri;padding-right:10px;padding-top:5px;border-top: 1px #000000 dotted; border-bottom: 1px #000000 dotted;">
<a href="http://website.nl/" target="_blank" title="Ga naar de website">
<img src="http://www.website-kindercoaching.nl" alt="Ga naar de website" style="font-family:calibri;text-align:right;margin:0px;padding:10px 0 10px 0;" border="0" width="232">
</a>
</td>
</tr>
<tr>
<td colspan="2" style="font-family:calibri;color:#a3a3a3;font-size:11px;margin-top:6px;line-height:14px;">
<br>Dit e-mailbericht is uitsluitend bestemd voor de geadresseerde. Als dit bericht niet voor u bestemd is, wordt u vriendelijk verzocht dit aan de afzender te melden. Kijk & Zie staat door de elektronische verzending van dit bericht niet in voor de juiste en volledige overbrenging van de inhoud, noch voor tijdige ontvangst daarvan. Voor informatie over Kijk & Zie raadpleegt u Kijk & Zie.<br><br>
</td>
</tr>
</table>';
$contents = preg_replace('/\[contents]/',$texts, $handtekening);
$mail->msgHTML($contents);
$mail->AltBody = $texts;
if(!$mail->send())
{
$isValid = false;
}
$mail = new PHPMailer;
$mail->From = 'info#website.nl';
$mail->FromName = 'Kijk & Zie';
$mail->addAddress($email); // Add a recipient
$mail->isHTML(true); // Set email format to HTML
$mail->Subject = 'Bedankt voor uw aanvraag bij Kijk & Zie';
$texts = 'Geachte heer/mevrouw '.$naam.',<br /><br />
Hartelijk dank voor uw aanvraag bij Kijk & Zie<br />
Wij reageren zo spoedig mogelijk op uw aanvraag.<br /><br />
Uw gegevens worden nooit aan derden ter hand gesteld.
';
$contents = preg_replace('/\[contents]/',$texts, $handtekening);
$mail->msgHTML($contents);
$mail->AltBody = $texts;
if(!$mail->send())
$isValid = false;
}
if($isValid == true) {
$result["submit_message"] = _msg_send_ok;
} else {
$result["submit_message"] = _msg_send_error;
}
$array = array(
'isValid' => $isValid
);
echo json_encode($result);
This is the ajax code in case someone needs it:
//contact form
if($(".contact-form").length)
{
$(".contact-form").each(function(){
$(this)[0].reset();
});
$(".submit-contact-form").on("click", function(event){
event.preventDefault();
$("#contact-form").submit();
});
}
$(".contact-form").submit(function(event){
event.preventDefault();
var data = $(this).serializeArray();
var self = $(this);
//if($(this).find(".total-cost").length)
// data.push({name: 'total-cost', value: $(this).find(".total-cost").val()});
self.find(".block").block({
message: false,
overlayCSS: {
opacity:'0.3',
"backgroundColor": "#FFF"
}
});
$.ajax({
url: self.attr("action"),
data: data,
type: "post",
dataType: "json",
success: function(json){
self.find(".submit-contact-form, [name='submit'], [name='name'], [name='email'], [name='message']").qtip('destroy');
if(typeof(json.isOk)!="undefined" && json.isOk)
{
if(typeof(json.submit_message)!="undefined" && json.submit_message!="")
{
self.find(".submit-contact-form").qtip(
{
style: {
classes: 'ui-tooltip-success'
},
content: {
text: json.submit_message
},
position: {
my: "right center",
at: "left center"
}
}).qtip('show');
self[0].reset();
self.find(".cost-slider-input").trigger("change");
self.find(".cost-dropdown").selectmenu("refresh");
self.find("input[type='text'], textarea").trigger("focus").trigger("blur");
}
}
else
{
if(typeof(json.submit_message)!="undefined" && json.submit_message!="")
{
self.find(".submit-contact-form").qtip(
{
style: {
classes: 'ui-tooltip-error'
},
content: {
text: json.submit_message
},
position: {
my: "right center",
at: "left center"
}
}).qtip('show');
}
if(typeof(json.error_name)!="undefined" && json.error_name!="")
{
self.find("[name='name']").qtip(
{
style: {
classes: 'ui-tooltip-error'
},
content: {
text: json.error_name
},
position: {
my: "bottom center",
at: "top center"
}
}).qtip('show');
}
if(typeof(json.error_email)!="undefined" && json.error_email!="")
{
self.find("[name='email']").qtip(
{
style: {
classes: 'ui-tooltip-error'
},
content: {
text: json.error_email
},
position: {
my: "bottom center",
at: "top center"
}
}).qtip('show');
}
if(typeof(json.error_message)!="undefined" && json.error_message!="")
{
self.find("[name='message']").qtip(
{
style: {
classes: 'ui-tooltip-error'
},
content: {
text: json.error_message
},
position: {
my: "bottom center",
at: "top center"
}
}).qtip('show');
}
}
self.find(".block").unblock();
}
});
});
What could it be that's preventing me from receiving/sending any emails?
When I submit the form it gives me a success message, and in the serverlog I can see it is posted succesfully.