I had an email from Paypal, asking for immediate attion. "You’re receiving this notification because you’ve been identified as a merchant who has used IPN endpoints within the past year. If you have not made the necessary changes, we urge you to do so right away to avoid a disruption of your service!" It goes onto say things like "testing the sandbox" what is that?? About getting in touch with "consult with your individuals responsible for your PayPal integration" who are they?? As far as I know I am not a merchant, I sell very rarely, I uses paypal to mainly to buy, The email says something about endpoints?? I really do not have a clue.
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