If I share an Apple relay email address provided to my app with a partner that also has independently registered their domains and emails, can they email the address provided to me? If not, is there a way to allow registering a business partner domain with your domain?
For example if a customer books a flight in an app and also purchase travel insurance for the flight in that app, and before Sign in with Apple, the issuance company would email the customer separately from the travel agency to confirm both purchases. How will both emails be sent with Sign in with Apple?
Hi Fizzix,
This is not going to work. Private relay email addresses are not supposed to be handed around. They are pinned to the specific mail domains you have registered in the developer portal. The private relay MTAs enforce SPF for your set of registered sending domains and do not allow use of @privaterelay.appleid.com email addresses by third parties.