PayPal Setup ( IPN and PDT )
Click the Profile link at the Top of PayPal Overview page.
Click My Selling Tools in the left hand column under My Profile. Scroll down to the Getting paid and managing risk section ( you may have to expand it ) and click Update next to Instant payment notifications. Enable IPN and set the Notification URL to ( using your domain name of course ).
It should look something like this...
The IPN URL is called by Paypal each time an order is made and Payloom uses this call to send out the download email to the buyer. This happens even if the do not return to your site after making payment.
If you are already using IPN for another script then have no fear. Just leave the URL as you already have it. Payloom can override the default IPN URL when the customer submits their order. You do not need to do anything.
Enable Auto Return and PDT
Although Payloom will email the download links to the buyer immediately after paying it is a good idea to also return them to your site and provide the download links on a download page also. Payloom uses Paypal's Auto Return and PDT to accomplish this.
Return to the Profile page and click the My Selling Tools link in the left column under My Profile. In the Selling online section ( you may have to expand it ) and click Update next to Website preferences.
Enable Auto Return and set the URL to be (setting your site)
Now scroll down the page a little and enable Payment Data Transfer. Click Save to store the settings. Once enabled it should look something like this.
Finally copy to the clipboard the long Identity Token that Paypal displays after you enable PDT. This needs to be added to your Pro Settings in the space provided.