PayPal IPN acknowledgements failing with SSL routines:SSL3_READ_BYTES:sslv3 alert handshake failure
This is the same problem as Error 0x1408F10B: “SSL3_GET_RECORD:wrong version number” with PayPal SDK The version of PayPal API we are using hard codes CURLOPT_SSLVERSION to 3. Our fix is to insert this before any PayPal calls. PPHttpConfig::$DEFAULT_CURL_OPTS[CURLOPT_SSLVERSION] = 4;