Seems like PayPal is having a problem with My Tickets’ default IPN address, as we keep receiving these emails from PayPal warning about this issue:
Hello [REDACTED] , Please check your server that handles PayPal Instant Payment Notification (IPN) messages. Messages sent to the following URL(s) are not being received: https://www.[REDACTED].org/?mt_paypal_ipn=true If you do not recognize this URL, you may be using a service provider that is using IPN on your behalf. Please contact your service provider with the above information. Once you or your service provider fix this problem, you or your service provider can resend the failed messages from the IPN History page. If this problem continues, PayPal may disable the IPN feature for your account.
And yes, IPN and IPN Message Delivery are both enabled in our PayPal account settings.
Unfortunately, at this time, I cannot view the IPN notification history in my PayPal account:
Instant Payment Notification (IPN) history
Feature Not Available
Sorry, this feature is currently unavailable. We apologize for any inconvenience.
After doing research in Google about similar IPN error emails from PayPal, I noticed that some other plugins use a dedicated page URL to prevent this problem (as compared to My Tickets use of a query parameter URL) — and some other plugin developers are choosing to use web hooks instead of IPN notifications.
Would it be possible for My Ticket users to use a dedicated page for the IPN address instead of the default query parameter URL?
What else could we do to fix this problem and stop these emails coming from PayPal? It seems the problem has to do with the query parameter (/?mt_paypal_ipn=true) in the IPN address.
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