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What is Mail.dat?
It is the only electronic mailing data file set, that is accepted by the USPS® for exchanging presort mailing information. Using Mail.dat with the USPS will enable you to profit significantly from streamlined production and the ability to take advantage of last-minute drop ship postage discounts. 

Need more information on Mail.dat?
Please fill out the form to submit a request, and a postal specialist will send you more information.
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