For my membership site, I've set up PayPal Payments Standard Gateway. Apparently it requires me to set up a Paypal IPN listening URL.
In order for Membership to function correctly you must setup an IPN listening URL with PayPal. Failure to do so will prevent your site from being notified when a member cancels their subscription.
In my Paypal account, I already have a IPN handler set up for an Aweber app. What should I do now?