I spent two hours today trying to figure out why paypal wasn’t sending any instant payment notifications (IPN) to one of our new projects. Everything seemed right, I had notify_url in the form, the script could be accessed remotely, I had logging on for http and the script itself. After processing a payment I had 0 requests from the paypal servers hit our development server.
I read around various blogs and discussion forums for obvious problems, of which there are many (see below), but I was sure I had done everything right!
Eventually I stumbled across some posts on the paypal developers forum where a few posters were complaining that the sandbox IPN posts were either really slow (hours) or just never got sent. Worse still, there was one post where paypal acknowledged that payment notifications just did not work on the sandbox for two months!! Continue reading “Paypal IPN from the sandbox not working”