Now fixed, but oof! "When an email sent to a Hide My Email address was rejected as spam, the rejection error message returned by iCloud's email servers included the meant-to-be-hidden email address in 100% of our limited tests."
evacideApple has fixed the bug in Hide My Email that linked Hide My Email addresses to your real one, but leaked email addresses could still be in third-party logs: easyoptouts.com/guides/apple...