Sometimes you’ll see a "Password incorrect" error when you sign in to Google with a third-party app, like Apple’s Mail app, Mozilla Thunderbird, or Microsoft Outlook. If you’ve entered your password correctly but you’re still getting the error, you might need to update the app or use a more secure app.
Update your app or operating system
If the app or the operating system on your device is out-of-date, you might not be able to connect it to your Google Account. Try updating the app or your device's operating system.
Use a more secure app
If an app doesn’t meet our security standards, Google might block anyone who’s trying to sign in to your account from it.
You can sign in to your Google Account from any third-party app that has the "Sign in with Google" option. You can also sign in to your Google Account using all Google products, like Gmail.
Learn more about less secure apps and your Google Account.
Use an App Password
An App password is a 16-digit passcode that gives a non-Google app or device permission to access your Google Account. Learn more about how to sign in using App Passwords.