Private Relay Emails Bouncing

Hello,

We are experiencing difficulties integrating the Apple Sign-In provider. Our third-party service is unable to forward emails to the private address @privaterelay.appleid.com.

I received a "hard debounce" error.

We have configured the following on Apple:

DKIM is OK - Our email signature is using our domain.

We are unsure what else to do.

Could you please assist us?