Does paypal callback eshop after a transaction? The server is behind a strict firewall and I am wondering if it hinders two ways communication with paypal.
I am trying to set up eshop with paypal sandbox and the payment are marked completed as far as paypal is concerned. However, it seems that eshop is not notified about the status of the transaction as it marks them all as failed.
Here is the messages eshop sends me. As you can see that the paypal status is: payment_status: Completed