@not_here Thanks in advance for any help you can provide. I have opened a paypal-support ticket for this urgent issue a couple days ago, but am still awaiting the first response. We've successfully been running a WordPress plugin using PayPal's Classic API integration and a custom listener URL for years. (It is a retired plugin that is no longer supported, but still functions to automate management of 100+ existing PayPal subscriptions.) After recently migrating the site to a new server, all IPNs related to the plugin started failing. No configuration changes have been made to the plugin or Paypal account. Our server manager insists WHM/Apache config is identical. I have also ruled out any issue with mod_sec rules causing the problem. It appears the only difference is the server IP address. Would I need to create and assign new Paypal NVP/SOAP (Classic) API credentials after moving the website to a new server if the domain and plugin configuration remains the same? Can I simply/safely "Remove" our existing Classic API integration and create new credentials? Any other suggestions are greatly appreciated.
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