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Sep 16, 2015 at 0:33 comment added Chris Burgess @Robert, please refer to my answer (or Twitter conver), as there is impact (confirmed by PayPal reps) if you are using IPN to merchant server and the merchant server uses SSL with SHA-1 cert.
Sep 14, 2015 at 16:53 comment added Robert PayPal's communication concerns the client SSL/TLS connection back to www.paypal.com (for the IPN message validation). There will be no impact on IPN message delivery to merchant servers and/or CivicCRM installations.
Sep 11, 2015 at 22:47 comment added Chris Burgess the image at the top of their SSL cert microsite does seem to say you'll need SSL for IPN now.
Sep 11, 2015 at 22:37 comment added Chris Burgess Asked @AskPayPal: twitter.com/xurizaemon/status/642466912979447808
Sep 11, 2015 at 21:38 history answered DaveD CC BY-SA 3.0