If you accept payments via Paypal, there are all sorts of things that you can connect to your Paypal payments that require you to set your Paypal Instant Notification (IPN) settings. For example, you can have someone who has paid you by Paypal automatically sent a customer email, or have them added to an autoresponder or mailing list. Here’s how to turn on your Paypal Instant Payment Notifications, and how to edit your IPN settings.