( Note to Google Apps users: This setting is hidden if your administrator has locked less secure app account access.)
If you want to allow access anyway, follow these steps: We don't recommend this option because it might make it easier for someone to break into your account.
All Google products, like Gmail, use the latest security measures. If this is the case, you have two options: As a Google Apps user, you will see a 'Password incorrect' error when trying to sign in. To help keep Google Apps users' accounts secure, we may block less secure apps from accessing Google Apps accounts. Change account access for less secure apps