Just had an email from Paypal
"Please check your server that handles PayPal Instant Payment Notifications (IPN). Instant Payment Notifications sent to the following URL(s) are failing:"
However, I'm using mywebsite.com/index.php?paypal-callback in the actual settings.
Whichever is correct, it's returning "request not validated" every time.
Paypal purchases are working, subscription payments are not.
I have a feeling this is connected to my htaccess and friendly URLS (set up as directed), but may be wrong.
Can anyone help?