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) 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