I just received an email from eBay that my endpoint is not working anymore. When I send an test notification from my eBay developer account, I receive the error message "Notification delivery failed with HTTP status code 444 from HERE_IS_MY_URL. Please ensure that the marketplace account deletion notification endpoint is ready to receive notifications."
I did not change anything and the notifications worked since today 2 o'clock PM. I don't understand this...
Is anybody here having the same problems?