Sign in with Apple users unable to Reply to received emails.

Has anyone else experienced users being unable to reply to communications with them? If so, was there a solution?

tldr;
Email from our domain to users ####@privaterelay.appleid.com email works correctly.

User replies to myemail_at_mydomain_com_####_8800cbcb@privaterelay.appleid.com fail.

I have emails properly being sent and received to my Sign in with Apple users via the methods described here:

https://help.apple.com/developer-account/?lang=en#/devf822fb8fc

The issue is if a user replies to the email. They get an immediate notice that the email was undeliverable.

According to the chart available within the docs, it seems like I should not have to configure the ability to receive replies. This should be handled by the relay server.

https://developer.apple.com/documentation/sign_in_with_apple/sign_in_with_apple_js/communicating_using_the_private_email_relay_service

Here's the failure email for reference (with private emails redacted of course)
Code Block
This is a system-generated message to inform you that your email could not
be delivered to one or more recipients. Details of the email and the error are as follows:
<myemail_at_mydomain_com_####_8800cbcb@privaterelay.appleid.com>:
   host smtp3.privaterelay.appleid.com[17.56.9.16] said: 550 5.1.1 Relay not
   allowed (in reply to RCPT TO command)
Reporting-MTA: dns; mr85p00im-zteg06011601.me.com
X-Postfix-Queue-ID: 1418E920ABA
X-Postfix-Sender: rfc822; user@email.com
Arrival-Date: Thu, 1 Oct 2020 21:09:09 +0000 (UTC)
Final-Recipient: rfc822; myemail_at_mydomain_com_####_8800cbcb@privaterelay.appleid.com
Original-Recipient: rfc822;myemail_at_mydomain_com_####_8800cbcb@privaterelay.appleid.com
Action: failed
Status: 5.1.1
Remote-MTA: dns; smtp3.privaterelay.appleid.com
Diagnostic-Code: smtp; 550 5.1.1 Relay not allowed
From: User Name <user@email.com>
Subject: Re: Test Sending
Date: October 1, 2020 at 2:09:08 PM PDT
To: Customer Service <myemail_at_mydomain_com_####_8800cbcb@privaterelay.appleid.com>
Test Reply
On Oct 1, 2020, at 2:02 PM, Customer Service <myemail_at_mydomain_com_####_8800cbcb@privaterelay.appleid.com> wrote:
Welcome


It was fixed after report, and it works check it now

Sign in with Apple users unable to Reply to received emails.
 
 
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