Good day @heidibylsma, Thank you for posting to the PayPal community. IPN feature is payment notification service, which will update the merchant regarding payment details processed on his/her website. PayPal system will send the IPN response to the merchant specified IPN endpoint URL. If your(merchant) IPN listener server fails to return HTTP 200 OK response to PayPal POST, system will retry sending the IPN details for 16 times by auto alerting the merchant via email. This is the reason why you have received IPN warning email alert. To stop receiving this IPN warning alerts and PayPal IPN response , please follow the below steps to disable the IPN feature in your PayPal account. Login PayPal.com >> Account settings >> Website Payments >> Instant payment notifications >> click "update" >> click "choose IPN settings" >> check your "IPN Notification URL">> toggle the option "Do not receive IPN messages (Disabled)" >> save. Also, please contact your website developer not to pass IPN "notify_url" parameter in your website payment API request calls to PayPal. PayPal will send the IPN response, to the "notify_url" even if the IPN feature is turned "OFF" in PayPal account. Please find the attached snapshot for reference. Sincerely, Chiranjeevi PayPal/Braintree MTS If this post or any other was helpful, please enrich the community by giving kudos or accepting it as a solution.
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