Transition from less secure apps to OAuth - Google Help Starting March 14, 2025, you and your users must use OAuth with third-party apps to access Gmail, Google Calendar, and Google Contacts OAuth is a more secure access method You will no longer use a p
Less secure apps your Google Account - Google Account Help If an app or site doesn’t meet our security standards, Google might block anyone who’s trying to sign in to your account from it Less secure apps can make it easier for hackers to get in to your account, so blocking sign-ins from these apps helps keep your account safe Use more secure apps If an app uses less secure sign-in technology, you might not be able to use it with your Google