Implemented OAuth & API for mail Authentication (Google stops supporting password credentials)


Well-known member
Please add OAuth as a authentication method for email sending and bounce mail receiving. Please add API as a method of email sending & receiving. Google is phasing out password based authentication. Its likely that others will follow.

Highlights from a message from Google:

Starting February 15, 2021, G Suite accounts will only allow access to apps using OAuth. Password-based access will no longer be supported.

Access to Less Secure Apps will be turned off in two stages:
  1. June 15, 2020 - Users who try to connect to an LSA for the first time will no longer be able to do so. This includes third-party apps that allow password-only access to Google calendars, contacts, and email via protocols such as CalDAV, CardDAV and IMAP. Users who have connected to LSAs prior to this date will be able to continue using them until usage of all LSAs is turned off.
  2. February 15, 2021 - Access to LSAs will be turned off for all G Suite accounts.
What do I need to do?
To continue using a specific app with your G Suite accounts, users in your organization must switch to a more secure type of access called OAuth.

Other less secure apps
  • For any other LSA, ask the developer of the app you are using to start supporting OAuth.
Developer instructions
To maintain compatibility with G Suite accounts, update your app to use OAuth 2.0 as a connection method. To get started, follow our developer guide on using OAuth 2.0 to access Google APIs. You can also refer to our guide on OAuth 2.0 for mobile & desktop apps.

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Chris D

XenForo developer
Staff member
Just wanted to make clear that Google has suspended all of the switch-off dates until further notice:

Doesn't make the suggestion any less valid, but just making it clear to anyone who is concerned that it is much less urgent than originally thought.