A fake Hide My Email header can expose the address behind your Apple Account

A forged Hide My Email header can make Mac Mail expose a user's Apple Account address, extending the privacy risk beyond people who use Apple's alias service.Apple Mail
Developer Jeff Johnson disclosed the Mac Mail privacy flaw on July 19. His testing showed that a specially crafted message could make Mail display a misleading sender identity while a reply went out from the email address tied to his Apple Account.The behavior didn't require Johnson to use Hide My Email or maintain an iCloud.com