Notify_url suddenly stopped working

[IoanaMadalinaRG]

Sandbox stopped working since 04.12,2022.

• Stopped when using ngrok link like that: HTTPS:// ngrok
• Stopped when using HTTPS://mysite (private domain with Cloudflare flexible SSL)

What ive tried:

• Added new email address (confirmed).
• Changed $notify_url = $site_url."checks/verify-paypal.php"; to $notify_url = "https://**.com/checks/verify-paypal.php";
• Added IPN, but no IPN history. (only on the developer, in notifications)

*I have no errors in PHP

Part of my code:

$return_url = $site_url."index.php";
$cancel_url = $site_url."index.php";
$notify_url = $site_url."checks/verify-paypal.php";

if($paypal_mode == null){
  $url = 'https://www.paypal.com/cgi-bin/webscr'.$querystring;
}else{
$url = 'https://www.sandbox.paypal.com/cgi-bin/webscr'.$querystring;
}

[antoniogweb]

Hi, I can confirm that IPN calls stopped working on sandbox. No call to the notify url script. I've tested it for months, it is the same code and the same test domain and the same test account. But today no IPN calls at all. Please let us know. It was happend some time ago, then paypal solved the issue.

[IoanaMadalinaRG]

Hope they will fix it as soon as possible.

[daviddk8]

The same my last IPN is from 4 december 2022. 

I really hope that was is writen on the page below has nothing to do with that:

Instant Payment Notification (IPN) simulator (paypal.com)

"On December 8 we will stop supporting IPN Simulator. You can bookmark the page to keep accessing this feature"

[MTS_Justin]

Hello,

There was a backlog in the IPN queue for our sandbox environment and this was preventing new IPN's from being dispatched.

The backlog has now been cleared and new IPN's are being delivered as expected.

Apologies for any inconvenience.

Thanks !

[jayersgould]

I cannot get the notify_url to fire at all in the Sandbox environment.  IPN SImulator gives "IPN was sent and the handshake was verified." message.  URL is active and no errors when accessing.  The entire sandbox transaction processes perfectly except for the IPN not being being called via the notify_url parameter.  I am at my wit's end trying to figure this out.

[MTS_Justin]

Hello,

There was a temporary interruption to IPN delivery which has now been resolved.

Apologies for any inconvenience.

Thanks !