If you’re an Apple user, you can access a built-in tool that will help with email aliases on participating apps and services.
When you sign up with a compatible app or website, you’ll see a “Sign in with Apple” button. Tap it, and you can use your iCloud account to log in instead of creating a brand-new username and password.
You’ll see a pop-up that walks you through the process. If you want, you can share your real email address with the service, but the savvy move is to use a feature called “Hide My Email.”
Do that, and Apple will generate a random, unique email address and share that with the service you’re signing up for. Companies will still be able to reach you—any emails they send you will be forwarded to your regular email inbox—but they won’t know your real address.
Sign in with Apple is a great privacy supplement to keep your identity hidden from apps and a variety of websites.
You don’t have to keep track of the fake emails: Apple plugs that information in for you when you’re at the log-in screen. You can change the emails you’ve shared and even turn off email forwarding so you don’t get spam using the settings on your iPhone or iPad, or on iCloud.com.
Apple says it won’t read the content in the emails that companies send you, aside from doing some automatic spam filtering.