Less secure apps can make it easier for hijackers to break into user accounts and devices. Blocking sign-ins from these apps helps keep accounts safe. For these reasons, Google is limiting access to Google GSuite.  Here’s the list of Oauth Secure apps, plus some new additions.

New additions to the list of Oauth secure applications:

• Windows Outlook 2016
• Windows Outlook 2019
• Outlook for Office for Office 365
• AirMail
• eM Client

Examples of apps that don’t support modern security standards include:

• ​Native mail, contacts, and calendar sync applications on older versions of iOS and OSX​
• ​Some computer mail clients, such as older versions of Microsoft Outlook

Once you have signed in, Google issues you a special OAuth token, and the app can then validate and trust from the token that you have signed in properly.

There are several reasons Oauth is important:

1. By controlling the login form, Google can limit and monitor attacks attempting to discover passwords via brute-force login attempts.
2. Controlling the login form also allows Google to protect you against a malicious or incompetent app that might not handle your password in an appropriate way.
3. You don’t have to share (and risk compromising) a password that, let’s be honest, you probably re-use at every other internet service you have.
4. By tracking tokens, Google allows you to revoke tokens for compromised devices or applications.

Mobile App Setup

List of Oauth secure applications compatible with GSuite Summary

Jump on and resolve these issues for users utilizing Gsuite IMAP email clients before June 2020.  Otherwise, your email client will cease to work after that date.