I am working on a ordering system, where the payment is taken using PayPal.
Currently have issues with IPN.
I have used the sample IPN code provided via this link below:
https://github.com/paypal/ipn-code-samples/blob/master/paypal_ipn.php
However every time I test IPN via IPN Simulator it shows below error:
IPN was not sent, and the handshake was not verified. Please review your information.
Lots of people have suggested that the IPN Simulator is broken.