Helix One Mail — One-Time Owner Setup
PayPal-only recurring billing. Customer never sees cPanel/API configuration.
cPanel APINOT CONNECTED
PayPal APINOT CONNECTED
PHP IMAPOK
PayPal PlanNOT CREATED
PayPal webhook URL
https://mail.helixonepc.com/paypal-webhook.php
Webhook events: BILLING.SUBSCRIPTION.ACTIVATED, BILLING.SUBSCRIPTION.UPDATED, BILLING.SUBSCRIPTION.CANCELLED, BILLING.SUBSCRIPTION.SUSPENDED, BILLING.SUBSCRIPTION.EXPIRED, BILLING.SUBSCRIPTION.PAYMENT.FAILED, PAYMENT.SALE.COMPLETED.