Paypal IPN error message
I run a web store on Magento CE 1.7 on my linode.
Lately, I keep getting these error messages from Paypal:
"Please check your server that handles PayPal Instant Payment Notifications (IPN). IPNs sent to the following URL(s) are failing…"
I am using Paypal for more than 3 years now. It mostly worked fine. Just lately I keep getting these notifications (without having made any updates or changes to my Magento installation).
Can you help?