IPN Handler Blocked?
<p>I'm playing around with AlertPay Sandbox. So upon payment from AlertPay, I want AlertPay to send an IPN message to my Alert URL so I can update some data. I had this working a week ago and now it's not. I'm thinking that my webhost is blocking me. I chatted with a tech who told me nothing was getting blocked on there end. So according to AlertPay, it's also possible that "The firewall settings on your web server that might be blocking HTTP POST from AlertPay"</p>

<p>I'm hoping someone has some experience with this and can help me. How would I check to see if my web serer is blocking HTTP POST from AlertPay?</p>
