IPNs are still being sent, but currently it isn't possible to verify them. You could decide to skip the verification process, but that's not a good idea IMHO. I guess we need to wait until PayPal fixes this.
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For the record: https://www.paypal.com/cgi-bin/webscr?cmd=_display-ipns-history Fatal Failure This is up to: https://www.paypal.com/cgi-bin/ Yet everything is "Operational" according to the status page: https://www.paypal-status.com/product/production
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