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Undeliverable mail management (return to sender address) involves a set of actions aimed at reducing the frequency and consequences of costly returns during direct mail campaigns or mass mailings of addressed mail, whether for promotional or administrative purposes. This management includes preventative measures and specific handling of identified undeliverable mail. Preventative measures focus on the quality of the addresses used, such as optimizing data entry forms, verifying data entry, regularly updating customer files, etc. In the case of confirmed undeliverable mail, the processing primarily consists of correcting or eliminating incorrect addresses through corrective or reassignment actions based on the information provided by the undeliverable mail label. Furthermore, undeliverable mail management may also include follow-up reminders via other communication channels such as email or SMS, provided that the appropriate data and necessary consents are available. A label for qualifying undeliverable mail and a concrete example of a routing service integrating the management and retrieval of undeliverable mail illustrate these practices.

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