Making the Most of USPS Bulk Mail: Your Guide to Savings and …
https://www.pitneybowes.com/us/blog/usps-bulk-mail-savings-and-efficiency.html
WEBDec 6, 2023 · Understanding USPS Bulk Mail and How Presorting Can Lead to Savings. Bulk mail, as defined by the USPS, refers to such volumes of mail that are eligible for a bulk discount. When mail is presorted by ZIP Code™, it reduces the processing and delivery cost for USPS, and in turn, they pass on these savings to the mailers.
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