USPS Info. & Requirements

The breadth of what makes up the USPS requirements for manifest mailing can be very technical, and very detail oriented. It is not the intention of this document to provide a knowledge-base for those requirements. These requirements are, in fact, what AutoMail® "automates" on your behalf. With that in mind, there are resources provided by USPS which clearly outline the many facets of manifest mailing; from the Intelligent Mail® barcode and it's specifications, envelope specifications, tray specifications, etc. See, also, the Mailpiece section for more information on how AutoMail® constructs a mailpiece in adherence to USPS specifications.. Below are a some key URLs which will point to particular USPS resources in relation to manifest mailing.


Postal Explorer


Domestic Mail Manual

Mailing Standards of the United States Postal Service


RIBBS® National Customer Support Center


RIBBS® - Intelligent Mail® Barcode for Mailpieces


Intelligent Mail® Barcode Specifications


minusData Fields In The IMb


Barcode ID
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IMB Checklist
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Data Fields
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Mailer ID
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Routing Code
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Serial Number
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Service Type ID
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Look Up a ZIP Code™

check validity of any United States address!input.action


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