Adding Sandbox Tester in iTunes Connect with an existing Apple account

Question

I\'m trying to add sandbox testers in iTunes Connect. But I\'m getting this error:

The email address you entered already belongs to an existing Apple acco

Answer 1

My problem was the password (at least 1 capital letter, 1 number and 1 punctuation char)

Answer 2

The email cannot be associated with an existing account, please see the link below.

Because the email address used to create a sandbox tester account can't be associated with any existing Apple account, consider creating a dedicated email address for each sandbox tester.

https://developer.apple.com/library/ios/documentation/LanguagesUtilities/Conceptual/iTunesConnect_Guide/Chapters/SettingUpUserAccounts.html

Answer 3

I fixed this by creating a brand new (free) Google account myappsandbox@gmail.com and adding that as a new sandbox tester. This makes a new Apple ID for that email address. It's a pain but it worked.

Answer 4

The errors

The email address you entered already belongs to an existing Apple account. Please try again.

and

An unknown error has occurred.

and

An error has occurred. Try again later.

are equivalent.

It means that your email address is not accepted. The email field may also be highlighted red when the error message is shown.

Apple blocks these email addresses (this is undocumented):

• Existing Apple accounts
• Existing Apple accounts with the Gmail + trick added to the sandbox user account
• Mailinator
• Mailinator alternate domains
• Other, undocumented stuff

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I'm just going to post the real solution here, since this is what other people are wanting to know:

ANSWER

1. Login to MyDomain, or GoDaddy or whatever you use to manage your personal domain (if you don't control any domains you can turn in your nerd card now)
2. Create a new MX record for anon.yourdomain.com and point it to mail.mailinator.com. Or, possibly, realize that you already did this a while ago for some previous reason
3. Register the sandbox with some email like appleserrormessagessuck@anon.yourdomain.com
4. Then you're done

Answer 5

For each sandbox tester, you’ll need to collect the following information:

Email address that has never been used as an Apple ID to purchase iTunes or App Store content, nor associated with any existing Apple ID. Consider creating a dedicated email address for each sandbox tester.

https://help.apple.com/app-store-connect/#/dev8b997bee1

This means that you cannot use use an existing Apple ID or @icloud.com email as a sandbox tester.

Answer 6

June 2020 Solution

• You need a different email address than your standard AppleID. If your AppleID is name@gmail.com, then you have to use a complete different email like othername@gmail.com.
• If you use gmail, you can use many test accounts with the same email address (but different from the standard AppleID). Just add a dot to generate multiple test users with the same email address:
  • othername@gmail.com
  • o.thername@gmail.com
  • ot.hername@gmail.com
  • and so on