In order to use the Email Actions on a Gmail account where 2-step verification is enabled, the below steps should be followed:
- Login to Gmail
- Navigate to Account > Sign-in & security > Signing in to Google
- Select "App Passwords"
- Enter your login credentials
- In the "Select app" drop-down list, choose "Other(Custom name)", and enter an appropriate name
- Press "Generate"
- Copy the 16-character password, and use it in the Password field of the relevant email action.
*Note: This password will not be visible to you after it is generated. Therefore, in order to avoid generating a new password every time you use a new Email Action, you may wish to store this password somewhere safe for later use.