What needs an application password?
Examples of devices and applications that use App Passwords include: Email clients such as Outlook, Apple Mail and Thunderbird, and any iOS (iPhone/iPad) devices.
How to generate an application password
Visit your App password page
Click the Select App dropdown and click Mail
- Click the Select Device dropdown and click the option that most closely resembles your device and click GENERATE
You'll then see the new app password you just created. LEAVE THIS SCREEN UP FOR NOW:
Once you click Done, you’ll never see that application-specific code again. But don't panic: You can generate a new one
On your iOS device or desktop mail program you will enter this app password in place of your normal Google account password
NOTE: Do not include the spaces in the app password. The spaces simply make it easier to read
Once you've entered your password and click OK your account should be all set
To generate backup codes for your account, please follow the steps in this KB article.