Configuring your sending domain for Apple's "Hide My Email" feature

This guide will walk you through the necessary steps to ensure your transactional emails are successfully delivered to users who use Apple's "Hide My Email" feature.

Why is this configuration necessary

If your app or website uses Sign in with Apple, some of your users may choose to hide their real email address using Apple's Hide My Email feature. These users will have an email address in the format acr2qo5e9v@privaterelay.appleid.com.

For transactional emails to be successfully delivered to these users, you must register the sending domain in your Apple Developer account. Without this configuration, all emails to Hide My Email users will hard bounce.

How to register your sending domain

The steps to register your sending domain depend on how you send emails to your customers. Please choose the option that applies to you.

Option 1 - Basic (Cleeng default emails)

Emails are sent from Cleeng's account, so you need to register Cleeng's sending domain.

1. Log in to your Apple Developer account.
2. Go to Certificates, Identifiers & Profiles, click Services in the sidebar.
3. Click Configure next to Sign in with Apple for Email Communication.
4. In the Email Sources section, click + icon to add a new domain.
5. Enter cleeng.com and click Next.
6. Confirm and click Register.
7. Verify that the domain shows a green SPF check in the table.

Option 2 - Advanced (your own Mailchimp account)

Emails are sent from your own Mailchimp Transactional account, so you need to register the sending domain you configured in Step 2 of the Advanced setup.

1. Log in to your Apple Developer account.
2. Go to Certificates, Identifiers & Profiles, click Services in the sidebar.
3. Click Configure next to Sign in with Apple for Email Communication.
4. In the Email Sources section, click + icon to add a new domain.
5. Enter your sending domain and click Next.
6. Confirm and click Register.
7. Verify that the domain shows a green SPF check in the table.

Additional resources

For more details, refer to Apple's official documentation: Configure private email relay service.