Hi! I'm using https://www.paypal.com/cgi-bin/webscr. Does it makes any different rather than https://ipnpb.paypal.com/cgi-bin/webscr? The response of these URL can only be either VERIFIED or INVALID? Can it be something else? Sometimes I get some strange characters as response. What could be the problem? Although it's from live environment I hope I selected the correct Category/Board.
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