Go to iCloud.com and login then open mail. Click the settings in the bottom left of the screen and you can create an alias there. Yes, the alias can be used anywhere and the email will be delivered to you as though you were using your original iCloud email address.
Go to iCloud.com and login then open mail. Click the settings in the bottom left of the screen and you can create an alias there. Yes, the alias can be used anywhere and the email will be delivered to you as though you were using your original iCloud email address.