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Configure an external recipient warning

When your users respond to an email message, the recipients may be external to your organization. You can set up external recipient alerts to protect your users from unintentionally sharing information externally.

Gmail detects if an external recipient in an email response is not someone a user interacts with regularly, or is not present in a user’s Contacts. When you configure this setting, your users receive a warning and an option to dismiss.

Configure the external recipient reply warning

To configure the external recipient reply warning:

  1. Sign in to your Google Admin console.

    Sign in using your administrator account (does not end in @gmail.com).

  2. From the Admin console dashboard, go to Appsand thenG Suiteand thenGmailand thenAdvanced settings.

    Tip: To see Advanced settings, scroll to the bottom of the Gmail page.

  3. Select your top-level organization.
  4. Scroll to Unintended external reply warning.
  5. Toggle the checkbox to enable or disable this setting.
  6. Click Save.

It can take up to an hour for changes to propagate to user accounts. You can track prior changes under Admin console audit log.

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