Window Book is the premier shipping and mailing software partner to fulfillment houses, lettershops & corporate mailers. We make businesses more profitable by allowing them to mail and ship more intelligently using USPS®. Mailers know us for our postage statement management software and shippers know us for our easy-to-use delivery confirmation and manifesting systems. Users have confidence that they have the most up to date information, such as new USPS rates, forms, and drop ship destinations.
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