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PayPal Instant Payment Notification (IPN) sends no User Agent

PayPal IPN sends requests with no User Agent string set in the HTTP header

PayPal IPN sends requests with no User Agent string set in the HTTP header

Came across this issue today while troubleshooting problems with PayPal payments on a site. PayPal kept sending the “PayPal Instant Payment Notification Warning” messages and eventually sent a “PayPal Instant Payment Notification Disabled” one and obviosuly no transactions could be automatically

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