mallsop, thank you very much for posting your question and resolution. I've encountered a similar problem and received the same email, but am not sure how to fix the issue. What typo did you know to fix? And which PHP page should I be looking for? In my situation, would it happen to be this one? http://transnationalaction.org/wp-content/plugins/donate-plus/paypal.php Unfortunately, I don't know much about fixing server issues, so thanks in advance for any help you can offer! @mallsop wrote: *Self Solved* I found out later the error was 500 internal server error on my end. The CC would post back to my ipn url and the PHP page I had created had an error. (No human sees the page). I fixed the typo and the paypal transactions were not longer complaining (used to say retrying now says sent). -Cheers.
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