paypal ipn failure email

[hemendraadv]

i am using paypal payment pro, and it allow user to select credit card for express checout as payment method. all thing working fine but i am receveied a PayPal Instant Payment Notification Warning email 

Please check your server that handles PayPal Instant Payment Notifications (IPN). IPNs sent to the following URL(s) are failing:

https://gaemspge.com/paypal/ipn/

https://gaemspge.com/paypal/standard/ipn

If you do not recognize this URL, you may be using a service provider that is using IPN on your behalf. Please contact your service provider with the above information. If this problem continues, IPNs may be disabled for your account.

i am using magneto 1.9.1.1.

can you please help me to show this IPN failure issue.

Thanks in advanced

[swappler]

I debugged the ipn controller and found out that in my case, the call against url .../paypal/ipn returns error code 503.

Thats why paypal sends the alert e-mails.

The issue is, that the ipn message does not contain the field "invoice" which will be used for further processing of the ipn message in magento.

i've submitted a ticket to the paypal forum:

https://www.paypal-community.com/t5/About-Settings/Instant-Payment-Notification-IPN-HTTP-503-Msg-rec...