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This paper explores the relationship between the Postal Service and a related industry group called mail service providers (MSP). MSPs perform mailing-related services for companies or organizations interested in using the mail to reach their customers. Specific MSP services include designing, printing, transporting, or otherwise preparing mailings to qualify for Postal Service postage discounts (“worksharing”). MSPs can be an efficient and cost-effective option for organizations that have limited expertise in navigating complex Postal Service business mailing requirements. MSPs can help these organizations use the mail for effective marketing, advertising, and general communication.