To set up the integration, you will need to enable PayPal’s IPN. In PayPal go to Account Settings > Notifications > Instant payment notifications.
If you don’t have IPN turned on already, enable it with https://clients.yoursite.com/paypal/ipn as the notification url. The actual link you use here doesn’t matter as long as IPN is enabled.
In SPP there are a two settings you can configure for this module:
Seller email – the email address where you’ll be receiving payments (which clients will see).
Primary email – if your PayPal account has multiple emails enter your primary email here. SPP needs it to verify IPN notifications which only use the primary email.
If the system receives a payment notification from an email not in these settings, you will receive a security alert.
The PayPal module supports subscription services, however only one subscription per order can be created. If you offer multiple recurring services in your order form, SPP will combine the total amounts to create a single subscription in PayPal.
Payments in Sandbox mode
For testing payments in sandbox mode you will need to use a sandbox seller account with IPN enabled just like in live mode. To save you the hassle of setting up multiple sandbox PayPal accounts you can enter firstname.lastname@example.org as the seller email in PayPal module settings, and change it to your real email when you’re ready to go live.