问题
We always get this message from paypal. The payments are going in and the url in the message is correct.
Is there a way to stop these messages?
>Please check your server that handles PayPal Instant Payment
>Notifications (IPN). IPNs sent to the following URL(s) are failing:
>
>http://sitename.com/payment/postbackPaypalSignUp/
>
>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.
>
>Thank you for your prompt attention to this issue.
>
>
>Thanks,
>
>PayPal
回答1:
IPNs to that URL are failing. You can see the log somewhere at PayPal. You must fix your IPN handler. Check its logs too.
来源：https://stackoverflow.com/questions/21896575/paypal-instant-payment-notification-warning