Apple Private Relay

Sign in with Apple

To send emails to users with private email addresses, you must register your outbound emails or email domains and use Sender Policy Framework (SPF) to authenticate your outbound emails.

Private relay email addresses created via Sign in with Apple is restricted to only receive emails from registered domains of the respective development team only.

References

• https://developer.apple.com/documentation/sign_in_with_apple/sign_in_with_apple_js/communicating_using_the_private_email_relay_service
• https://developer.apple.com/help/account/configure-app-capabilities/configure-private-email-relay-service/