I am trying to make my first IPN listener to connect my site with PayPal for different actions on IPN's.
I see in the documents "PayPal no longer supports HTTP for post backs" (more details). Does it mean my site (with the ipn listener script have to be on https domain or does only mean i have to send my verify callback to paypal's "https://ipnpb.paypal.com/cgi-bin/webscr" adress and not to "https://ipnpb.paypal.com/cgi-bin/webscr"?
As I mentioned in the document, you should call the PayPal end points only with https. (Otherwise your request will be denied) Your site don't need an SSL certificate.
是的，PayPal IPN回调确实仅允许在HTTPS域上使用。这是因为HTTPS提供了更高级别的安全性，可以保护HTTP通信中的数据传输，并防止中间人攻击和窃听。因此，PayPal要求IPN回调使用HTTPS协议，以确保交易数据的安全性和完整性，保护其用户的利益。