Postcom.org reports that the following will appear in this Fridayâ¬s (July 10) DMM Advisory: From now through November 28, 2009 the following readability thresholds for Intelligent Mail barcodes applied to Letter and Flat automation-price pieces are in effect: a. A mailing with an Intelligent Mail barcode readability verification result of 70% or higher passes verification. b. A mailing with an Intelligent Mail barcode readability verification result of below 70% will have additional postage calculated based on 100% of the automation-price pieces in the mailing.