Defeatenonce Posted July 13, 2015 Share Posted July 13, 2015 For a couple of days I am trying to fix this issue. In the gateway log it says IPN handshake invalid, There is no futher debug info. I already tried the option in the documentation the one with the charset but that doesn't seem to solve the issue. When I look at paypal IPN history I see error 503 the url that is in the discriptions leads directly to the callback paypal.php so that couldn't be the issue. I am really desperate right now. 0 Quote Link to comment Share on other sites More sharing options...
Defeatenonce Posted July 14, 2015 Author Share Posted July 14, 2015 For a couple of days I am trying to fix this issue. In the gateway log it says IPN handshake invalid, There is no futher debug info. I already tried the option in the documentation the one with the charset but that doesn't seem to solve the issue. When I look at paypal IPN history I see error 503 the url that is in the discriptions leads directly to the callback paypal.php so that couldn't be the issue. I am really desperate right now. Noone knows an answer? 0 Quote Link to comment Share on other sites More sharing options...
WHMCS Support Manager WHMCS John Posted July 15, 2015 WHMCS Support Manager Share Posted July 15, 2015 Hi, The solution to this error is published in our documentation: http://docs.whmcs.com/PayPal#IPN_Handshake_Invalid 0 Quote Link to comment Share on other sites More sharing options...
itvietnam Posted July 17, 2015 Share Posted July 17, 2015 The same with me here: http://forum.whmcs.com/showthread.php?103335-HTTP-406-with-paypal-callback and already open ticket to WHMCS's staff 2 days ago but no one check my ticket. Very long support from staff while automation from Paypal is pending -->stuck at Paypal and stop automation flow of WHMCS. As my research on the internet and others forum like Webhostingtalk, Lowendtalk... Only WHMCS got the error "IPN handshake invalid" but not others software. - - - Updated - - - Hi,The solution to this error is published in our documentation: http://docs.whmcs.com/PayPal#IPN_Handshake_Invalid He already mentioned this: "I already tried the option in the documentation the one with the charset but that doesn't seem to solve the issue." Please take a look insight your software, do any further check as you could and do not reply with automation form: please check the link, please check the link and please check the link. 0 Quote Link to comment Share on other sites More sharing options...
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