Running a mailing list through postal processing software is key for effective bulk mailing. Initially, the software standardizes and verifies addresses, ensuring they match the USPS format and that they are deliverable. Essential processes like CASS Certification refine ZIP code accuracy, while the system removes duplicates and updates addresses against the National Change of Address (NCOA) database. The next step is presorting, which organizes mail pieces by specific criteria, such as ZIP Code, ensuring they meet USPS sorting standards to qualify for bulk mailing discounts. Additionally, the software generates the necessary USPS documentation and labels required for your mailing. Lastly, modern postal software often incorporates features like barcode and Intelligent Mail Barcode (IMB) generation, facilitating efficient USPS processing and delivery. Some advanced platforms even allow rate comparison for optimal service selection, ensuring both cost-effectiveness and deliverability for direct mail campaigns.