User Guide

IPN Guide June, 2009 35
IPN Operations on PayPal
Resending IPN Messages
When the message has been sent, your server’s response to the HTTP POST is used to update
the HTTP response code field. A value of 200 indicates that your server successfully received
the IPN message. Other values typically indicate a server configuration error for the server that
hosts your IPN listener. For more information about these codes, see
RFC 2616: Hypertext
Transfer Protocol -- HTTP/1.1. If you do not see a response code, you should check that your
sever is running.