Archive for the ‘Mail.dat’ tag


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The USPS will discontinue support for Mail.dat version 8.1 on November 14, 2009. Mailers currently using 8-1 for electronic documentation should migrate to 8-2, or skip that version and go straight to the latest Mail.dat version, 9-1. 9-1 is required for participation in Full Service Intelligent Mail.

From the IDEAlliance website:
Mail.dat is the standard embraced by a significant portion of the mail production industry and the US Postal Service. Mail.dat is a relational database of nineteen “connected” files describing each characteristic that can exist within a mailing. As such, the standard has contributed to important gains in efficiency, economy, and strategy enhancement.

Written by Lisa.Bowes

July 6th, 2009 at 12:06 pm

Posted in Service,USPS

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IDEAlliance Mail.dat Website

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If you haven’t visited lately, head there.  The entire IDEAlliance website has been updated, and the Mail.dat pages in particular are greatly improved.  Learn all the Who What and Whys about Mail.dat.  Mail.dat continues to grow in importance, especially with the possible uses for Full Service Intelligent Mail.

Written by Lisa.Bowes

March 24th, 2009 at 1:26 pm

Posted in USPS

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Resources – Intelligent Mail – Mail.dat

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From USPS RIBBS site

Under the heading
Guide to Intelligent Mail®for Letters and Flats

there is a new Mail.dat guide for use with PostalOne!
PostalOne! Mail.Dat Technical Guide for Full Service 3.0 (pdf)     (rtf)
this guide MUST be used in conjunction with the Mail.dat specifications at

Written by Lisa.Bowes

October 9th, 2008 at 11:03 am

Mail.dat and Mail.XML

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New specifications have been posted for Mail.dat Version 08-2 and Mail.XML 5.0 at the IDEAlliance website here  Folks looking to Mail.dat to facilitate electronic postal commuinications with the USPS should be sure to review these specifications.

The IDEAlliance Mail.XML v 5.0 specifications currently scheduled for release in March 2009 will support Full Service electronic documentation functionality from single piece information; to range piece information; to nesting of pieces into handling units and handling units into containers; postage payment, qualification reports, electronic documentation management through transaction updates.

The time to prepare for Intelligent Mail is now.  Explore your options.

Best wishes,


Written by Lisa.Bowes

October 8th, 2008 at 2:07 pm

Posted in Intelligent Mail

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