Whitelist

Google shores up G Suite against hapless users in the enterprise: App whitelist, physical security keys, and more

https://www.theregister.co.uk/2019/08/01/google_rolls_out_advanced_protection_beta_for_g_suite/

4 months ago

Notable omission from list of trusted stuff? Microsoft Outlook

GoogleAgainstEnterpriseWhitelistPhysicalSecurity