I am trying to send email from our internal server. We are using gmail as smtp client. Gmail is bound to a domain hosted on squarespace. I have all the required DNS records - DKIM, DMARC, SPF configured in squarespace. In the Apple Developer Portal, I have also added allowed domains and email addresses in the Sign In with Apple settings. SPF verification passed. The problem is that emails sent to @privaterelay.appleid.com are not reaching the final recipient. On our end, the emails are sent and there are no errors. In the email signature the DKIM domain and the domain in the From: address match completely. Domain on tools like mxtoolbox passes all checks. Also, there is no response from the gmail server that the email was not delivered. To all other emails the emails are being sent with no problems. Please help me figure this out, maybe I am missing something.