For the last few days I have been experiencing IPN issues, when customers are sent back to my site after payment through Paypal, the IPN is no longer working correctly. It was working fine for the last 4 years!! nothing has changed but now customers get an error message saying unable to verify post vars
I just don’t get it, Ive gone through ever thing, all ‘https’ url’s are correct, The IPN link states that its receiving ok, the logs don’t seem to show any errors, I have run a server check using your tool and that has come up fine. i have checked the IPN history in Paypal and again everything looks fine, no issues.
Im really scratching my head over this. Any idea what the problem maybe?
Out of interest, I have another site that does not use S2Member but does use a credits based plugin, so when customers purchased credits, the IPN sends them back to the site and their credits are updated in their members area. Well this has also stopped working! i.e. their credits are not being automatically added
Could it be an issue that Paypal are experiencing? or is anybody else experiencing this?