Paypal Express IPN failure intermittent

Question

I am using Magento 1.9.0.1 and I am having issues with the PayPal IPN. Its currently set to be https://www.example.co.uk/paypal/ipn.

1) Is https://www.example.co.uk/paypal/ipn the correct address to use?

2) How can I start to debug this issue as PayPal as saying its a issue with the website

Answer 1

1. Yes, /paypal/ipn is correct
2. Try enabling debug mode and see if that gives you some insight. Set Debug Mode to Yes in Payment Methods > Paypal (edition) > Configure > Advanced Settings

If this does not help, look at Mage_Paypal_IpnController and processIpnRequest method in Mage_Paypal_Model_Ipn class and look for a good places to put some Mage::log calls.

I would also recommend that you create a PayPal Sandbox account if you don't have one already since it provides IPN request simulator.

Good luck.