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Do Manifest Mailers of Standard Mail and Package Services need Mail.dat?

April 26, 2017mail mail.dat mailers manifest package Services standard

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Do Manifest Mailers of Standard Mail and Package Services need Mail.dat?

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Yes. Mail.dat makes it easier to Manifest Standard Mail and Package Services. Participants in the USPS Manifest Mailing System (MMS) that prepare classes of mail other than First-Class, such as Standard Mail and Package Services, can also benefit from the use of Mail.dat. The Mail.dat standard supports the representation of fixed and floating batch manifests, as well as itemized manifests.