Relay Notifications Service
You can subscribe to Relay notifications through a variety of different channels.
For now, we recommend you use webhooks.
Notification services allow you to listen to events through a variety of channels.
Webhooks (or HTTP callbacks) allow you to subscribe to different events that affect a payment and to be notified directly when these events happen.Webhooks
To be able to receive notifications for events via email is a feature that's still in development and not available yet.