The main purpose of this legislation is to improve the United States Postal Service's (USPS) handling of undelivered and partially delivered mail routes. It aims to ensure that the Postal Service takes action based on specific recommendations made by the Inspector General to enhance the identification and notification processes related to these delivery issues. Key provisions of the legislation require the Postal Service to review and implement the recommendations from a report by the Inspector General, which focuses on how to better manage undelivered and partially delivered routes.