My client received this email from paypal yesterday:
Please check your server that handles PayPal Instant Payment Notifications (IPN). Instant Payment Notifications sent to the following URL(s) are failing:
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’ve checked the order history in Marketpress and it looks like all orders are being recorded fine, so I’m not sure what’s going on, but obviously it’s not acceptable.
Having looked at the error log in Paypal, they’re all showing 503 errors like the one attached. As far as I can tell, I’ve followed the setup for Marketpress to the letter so I’m rather confused as to why we’re getting this error. My client is handling transactions for a number of websites using the same PayPal account with IPN working fine (the other sites don’t use Marketpress), so allowing PayPal to disable IPNs is not an option.
Note: I’m running domain mapping on the sites where it’s failing. (Domain mapping is the thorn in my side at the moment!)
Please can anyone shed any light on how we can fix this?