Hide My Email is available to iCloud+ subscribers after they have installed the iOS 15.2, iPadOS 15.2, or macOS Monterey 11.2.1 betas.
Apple's beta release notes outline the feature update and make Hide My Email easier to use on Apple devices. Hide My Email is an iOS 15 or macOS Monterey feature that is available to all users of a paid iCloud+ subscription (priced at $0.99 per monthly).
Hide My Email allows users create unique email addresses that can be forward to their personal inbox. This is similar to a password manager that allows users to create random email addresses to forward to their personal inbox.
You can reply to all emails sent to an Apple-created email address. However, the recipient does not have access to your actual email address. You can also delete spam mails from an email address to stop receiving them.
Hide My email was previously accessible from the iCloud Settings for Apple devices. However, it is now available directly in the Mail App. When you compose an email in the Mail app, click on "From" to view the option to create a "Hide My Email” email address. This feature will create a random email address that conceals your real email address.