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Presort Object

Important Announcements

USPS Discontinuance of Hardcopy Postage Statements - Grace Period Extended to March 31, 2024

The USPS will continue to accept Hard Copy Postage Statements until March 31, 2024 to provide mailers enough time to implement electronic postage statements. Please see the USPS INDUSTRY ALERT to read more.

Documentation available: Upload Mail.dat Files to PostalOne! - January 19, 2024

Please see the instructions on how to Upload Mail.dat files to PostalOne! for help.

Service Discontinuation Advisory

Melissa plans to discontinue Presort Object on December 31, 2024. This is to provide enough time for our customers to find an alternative provider to integrate ito their current solution.

If you require an all-in-one presort software solution, please see the following products:

  1. Users who need an on-premise solution with the ability to customize mailings can migrate to Mailers+4 Desktop.

  2. Users who want the simplicity of minimal configuration can migrate to Mailers Online. No Installation necessary. A simple file upload and downloadable output.

To learn more, please see the Product Advisory.

USPS Discontinuance of Hardcopy Postage Statements - December 04, 2024

The USPS is discontinuing Hardcopy postage Statements to improve efficiency and expedite acceptance of mail. All domestic commercial mailings must use appproved elecronic method to transmit mailings to PostalOne! with the exception of Electronic Verification System (eVS) mailings. Please see the USPS INDUSTRY ALERT to read more.

January 2024 Price Rates - December 04, 2024

The January 2024 rates are expected to take effect January 21, 2024. To learn more about the upcoming changes, please visit USPS. 2024 Postage Price Changes.

USPS PostalOne! Mail.dat Client Update - December 04, 2024

The USPS® is requiring a PostalOne!® Mail.Dat® Client Update - Effective: January 07, 2024, to support the January 2024 Price changes. For PostalOne! E-Doc submitters, the new Mail.dat client (59.0.0.0_PROD) will be required after the release. The Mail.dat Client can be downloaded from the USPS Business Customer Gateway (BCG) (Sign In to BCG → Click "Mailing Services" in the top left under BUSINESS CUSTOMER GATEWAY → Click "Go to Service" next to Electronic Data Exchange (PostalOne!) → Download the Mail.dat Client Application under Mail.dat Support for Production. For additional information, please see the USPS Industry Alert.

General Information

Release Frequency: Monthly

Release Date: Monday closest to the 7th of the month.

Next Release Date: May 06, 2024

Build History

2024.04

Released on: April 08, 2024

Presort Object Version 22501

Added

  • None

Changed

  • Database update

Deprecated

  • None

Removed

  • None

Fixed

  • None

2024.03

Released on: March 04, 2024

Presort Object Version 22501

Added

  • None

Changed

  • Database update

Deprecated

  • None

Removed

  • None

Fixed

  • None

2024.02

Released on: February 05, 2024

Presort Object Version 22501

Added

  • None

Changed

  • Database update

Deprecated

  • None

Removed

  • None

Fixed

  • Fixed the Maildat .HDR Error "Record Count for CDR must be a numeric value" during presort.

2024.01

Released on: January 18, 2024

Presort Object Version 22499

Added

  • Presort Object (Version 22491) contains the latest January 2024 Postage Rates - Effective: January 21, 2024.

Changed

  • Database update
  • Mail.dat version updated from 22-1 to 24-1 to support the new January 2024 prices and PostalOne Maiil.dat client.

Deprecated

  • None

Removed

  • None

Fixed

  • None

Released on: January 08, 2024

Presort Object Version 22481

Added

  • None

Changed

  • Database update

Deprecated

  • None

Removed

  • None

Fixed

  • None

2023.12

Released on: December 04, 2023

Presort Object Version 22481

Added

  • None

Changed

  • Database update

Deprecated

  • None

Removed

  • Removed ACS enumerations that were no longer in use.

Fixed

  • Presort Object (Build 4.0.1.22481) Fixed issue with COSACK Flats.

2023.11

Released on: November 06, 2023

Presort Object Version 22476

Added

  • None

Changed

  • Database update

Deprecated

  • None

Removed

  • None

Fixed

  • Presort Object (Build 4.0.1.22474) Fixed issue with Mail.dat *.pbc file for First Class Mail - Heavy Flats.

Security

  • None

2023.10

Released on: October 09, 2023

Presort Object Version 22474

Added

  • None

Changed

  • Database update

Deprecated

  • None

Removed

  • This update removed ACS enumerations that were no longer in use.

Fixed

  • Presort Object (Build 4.0.1.22474) Fixed issue with Mail.dat *.pbc file for First Class - Political Mail.
  • Presort Object (Build 4.0.1.22474) Fixed issue with Mail.dat *.pbc file for USPS Marketing Mail Flats and issue with AADC Label Line 1 with certain zip codes.

Security

  • None

2023.09

Released on: September 05, 2023

Presort Object Version 22470

Added

  • None

Changed

  • Database update

Deprecated

  • None

Removed

  • None

Fixed

  • Presort Object (Build 4.0.1.22470) Fixed issue with Mail.dat *.pbc file for Flats and issue with AADC label line 1 with certain zip codes.

Security

  • None

2023.08

Released on: August 07, 2023

Presort Object Version 22466

Added

  • None

Changed

  • Database update

Deprecated

  • None

Removed

  • None

Fixed

  • This release fixed USPS Marketign Mail - Postage Statement (PS 3602-R) Lines D8 & D19.

Security

  • None

2023.07

Released on: July 10, 2023

Presort Object Version 22466

Added

  • July 2023 Postage Rates and Postage Statements are included in this update.

Changed

  • Database update

Deprecated

  • None

Removed

  • None

Fixed

  • None

Security

  • None

2023.06

Released on: June 05, 2023

Presort Object Version 22452

Added

  • None

Changed

  • Database update

Deprecated

  • None

Removed

  • None

Fixed

  • None

Security

  • None

2023.05

Released on: May 10, 2023

Presort Object Version 22452

Added

  • None

Changed

  • Database Update

Deprecated

  • None

Removed

  • None

Fixed

  • None

Security

  • None

2023.04

Released on: April 10, 2023

Presort Object Version 22452

Added

  • None

Changed

  • Database Update

Deprecated

  • None

Removed

  • None

Fixed

  • None

Security

  • None

2023.03

Released on: April 10, 2023

Presort Object Version 22452

Added

  • None

Changed

  • Database Update

Deprecated

  • None

Removed

  • None

Fixed

  • None

Security

  • None

2023.02

Released on: February 21, 2023

Presort Object Version 22452

Added

  • None

Changed

  • Database Update

Deprecated

  • None

Removed

  • None

Fixed

  • Presort Object build 22452 includes the implementation of the new Sack Elimination rules for USPS Marketing Mail - Flats.

Security

  • None

2023.01

Released on: February 06, 2023

Presort Object Version 22447

This update includes the current January 2023 rates.

We are working to resolve the issue with Sacks as soon as possible, please use the workaround below:

  • ISSUE: Mailers that need a sack extension after January 22, 2023 must complete the Sack Extension Request Sheet​​ and submit it to PCSC@usps.gov with the subject line SACK EXTENSION each Friday by 11:59 pm EST with the list of that weeks’ impacted mailings.​

  • USPS. PostalPro. Sack Extension Request Sheet: https://postalpro.usps.com/sack-extension-request-sheet

  • USPS. PostalPro. IndustryAlert. Work-Around Supporting the Postal Service's 30-Day Grace Period for Implementation of Sack elimination https://postalpro.usps.com/node/11729

Added

  • None

Changed

  • File name updated from presort_202212 to presort_202301.

Deprecated

  • None

Removed

  • None

Fixed

  • This update is the same as the previous update released on January 20, 2023. The file name was corrected from presort_202212 to presort_202301 to reflect the new rates and changes and minimize confusion between the two presort_202212 files released in January.
  • Presort Object (Build 22447 - File Name: presort_202212) released on January 20, 2023 included the new Postage updates.
  • Presort Object (Build 22436 - File Name presort_202212) released on January 09, 2023 includes the previous rates.

Security

  • None

2022.12

Released on: January 20, 2023

Presort Object Version 22447

Added

  • The new January 2023 Hardcopy Postage Statements and new rate files are included in this update.
  • ISSUE: Mailers that need a sack extension after January 22, 2023 must complete the Sack Extension Request Sheet​​ and submit it to PCSC@usps.gov with the subject line SACK EXTENSION each Friday by 11:59 pm EST with the list of that weeks’ impacted mailings.​
  • USPS. PostalPro. Sack Extension Request Sheet: https://postalpro.usps.com/sack-extension-request-sheet
  • USPS. PostalPro. IndustryAlert. Work-Around Supporting the Postal Service's 30-Day Grace Period for Implementation of Sack elimination. https://postalpro.usps.com/node/11729

Changed

  • Postage Statements have updated from July 2022 to January 2023.
  • Database Update

Deprecated

  • None

Removed

  • None

Fixed

  • None

Security

  • None

Released on: January 09, 2023

Presort Object Version 22436

Added

  • None

Changed

  • The USPS is starting to push for Mailers to use Seamless Acceptance. In order for you to participate in Seamless Acceptance we added a few new properties and a new Data file to the Presort Object.

  • The Properties will be:

    • POMLocaleKey - This property will be required and is a 9-digit code based on your Post Office of Mailing.
    • DDULocaleKey - This property is a 9-digit code based on the DDU you are taking your mail to. It will only be used for Standard Flat ECRRT mailings that are dropped off at the DDU.
    • DDUPostalCode - This property is the 9 digit zip code of the DDU post office. It will only be used for Standard Flat ECRRT mailings that are dropped off at the DDU.

    • The new data file is a Comma delimited file titled LocaleKey.csv. This new file will contain a list of every post office and its associated Locale Key. This file will be updated monthly along with all the other presort data files.

    • Build Compilation:

      The Windows DLLs have been compiled with the Visual Studio 2019 compiler. You no longer have to run the C++ Redistributables to use them.

Deprecated

  • None

Removed

  • None

Fixed

  • None

Security

  • None

2022.11

Released on: December 05, 2022

Presort Object Version 22436

Added

  • None

Changed

  • The USPS is starting to push for Mailers to use Seamless Acceptance. In order for you to participate in Seamless Acceptance we added a few new properties and a new Data file to the Presort Object.

  • The Properties will be:

    • POMLocaleKey - This property will be required and is a 9-digit code based on your Post Office of Mailing.
    • DDULocaleKey - This property is a 9-digit code based on the DDU you are taking your mail to. It will only be used for Standard Flat ECRRT mailings that are dropped off at the DDU.
    • DDUPostalCode - This property is the 9 digit zip code of the DDU post office. It will only be used for Standard Flat ECRRT mailings that are dropped off at the DDU.

    • The new data file is a Comma delimited file titled LocaleKey.csv. This new file will contain a list of every post office and its associated Locale Key. This file will be updated monthly along with all the other presort data files.

    • Build Compilation:

      The Windows DLLs have been compiled with the Visual Studio 2019 compiler. You no longer have to run the C++ Redistributables to use them.

Deprecated

  • None

Removed

  • None

Fixed

  • None

Security

  • None

2022.10

Released on: November 07, 2022

Presort Object Version 22436

Added

  • None

Changed

  • The new July 2022 Postal Rates are included in this update.
  • The USPS is starting to push for Mailers to use Seamless Acceptance. In order for you to participate in Seamless Acceptance we added a few new properties and a new Data file to the Presort Object.

  • The Properties will be:

    • POMLocaleKey - This property will be required and is a 9-digit code based on your Post Office of Mailing.
    • DDULocaleKey - This property is a 9-digit code based on the DDU you are taking your mail to. It will only be used for Standard Flat ECRRT mailings that are dropped off at the DDU.
    • DDUPostalCode - This property is the 9 digit zip code of the DDU post office. It will only be used for Standard Flat ECRRT mailings that are dropped off at the DDU.

    • The new data file is a Comma delimited file titled LocaleKey.csv. This new file will contain a list of every post office and its associated Locale Key. This file will be updated monthly along with all the other presort data files.

    • Build Compilation:

      The Windows DLLs have been compiled with the Visual Studio 2019 compiler. You no longer have to run the C++ Redistributables to use them.

Deprecated

  • None

Removed

  • None

Fixed

  • Fixed issue with Nonmachinable letters.

Security

  • None

2022.09

Released on: October 03, 2022

Presort Object Version 22436

Added

  • None

Changed

  • The new July 2022 Postal Rates are included in this update.
  • The USPS is starting to push for Mailers to use Seamless Acceptance. In order for you to participate in Seamless Acceptance we added a few new properties and a new Data file to the Presort Object.

  • The Properties will be:

    • POMLocaleKey - This property will be required and is a 9-digit code based on your Post Office of Mailing.
    • DDULocaleKey - This property is a 9-digit code based on the DDU you are taking your mail to. It will only be used for Standard Flat ECRRT mailings that are dropped off at the DDU.
    • DDUPostalCode - This property is the 9 digit zip code of the DDU post office. It will only be used for Standard Flat ECRRT mailings that are dropped off at the DDU.

    • The new data file is a Comma delimited file titled LocaleKey.csv. This new file will contain a list of every post office and its associated Locale Key. This file will be updated monthly along with all the other presort data files.

    • Build Compilation:

      The Windows DLLs have been compiled with the Visual Studio 2019 compiler. You no longer have to run the C++ Redistributables to use them.

Deprecated

  • None

Removed

  • None

Fixed

  • Fixed issue with Nonmachinable letters.

Security

  • None

2022.08

Released on: September 05, 2022

Presort Object Version 22436

Added

  • None

Changed

  • The new July 2022 Postal Rates are included in this update.
  • The USPS is starting to push for Mailers to use Seamless Acceptance. In order for you to participate in Seamless Acceptance we added a few new properties and a new Data file to the Presort Object.
  • The Properties will be:
    • POMLocaleKey - This property will be required and is a 9-digit code based on your Post Office of Mailing.
    • DDULocaleKey - This property is a 9-digit code based on the DDU you are taking your mail to. It will only be used for Standard Flat ECRRT mailings that are dropped off at the DDU.
    • DDUPostalCode - This property is the 9 digit zip code of the DDU post office. It will only be used for Standard Flat ECRRT mailings that are dropped off at the DDU.
    • The new data file is a Comma delimited file titled LocaleKey.csv. This new file will contain a list of every post office and its associated Locale Key. This file will be updated monthly along with all the other presort data files.

    • Build Compilation:

      The Windows DLLs have been compiled with the Visual Studio 2019 compiler. You no longer have to run the C++ Redistributables to use them.

Deprecated

  • None

Removed

  • None

Fixed

  • Fixed issue with Nonmachinable letters.

Security

  • None

2022.07

Released on: August 08, 2022

Presort Object Version 22432

Added

  • None

Changed

  • The new July 2022 Postal Rates are included in this update.
  • The USPS is starting to push for Mailers to use Seamless Acceptance. In order for you to participate in Seamless Acceptance we added a few new properties and a new Data file to the Presort Object.
  • The Properties will be:
    • POMLocaleKey - This property will be required and is a 9-digit code based on your Post Office of Mailing.
    • DDULocaleKey - This property is a 9-digit code based on the DDU you are taking your mail to. It will only be used for Standard Flat ECRRT mailings that are dropped off at the DDU.
    • DDUPostalCode - This property is the 9 digit zip code of the DDU post office. It will only be used for Standard Flat ECRRT mailings that are dropped off at the DDU.
    • The new data file is a Comma delimited file titled LocaleKey.csv. This new file will contain a list of every post office and its associated Locale Key. This file will be updated monthly along with all the other presort data files.

    • Build Compilation:

      The Windows DLLs have been compiled with the Visual Studio 2019 compiler. You no longer have to run the C++ Redistributables to use them.

Deprecated

  • None

Removed

  • None

Fixed

  • None

Security

  • None

2022.06

Released on: June 08, 2022

Presort Object Version 22432

Added

  • None

Changed

  • The new July 2022 Postal Rates are included in this update.
  • The USPS is starting to push for Mailers to use Seamless Acceptance. In order for you to participate in Seamless Acceptance we added a few new properties and a new Data file to the Presort Object.
  • The Properties will be:
    • POMLocaleKey - This property will be required and is a 9-digit code based on your Post Office of Mailing.
    • DDULocaleKey - This property is a 9-digit code based on the DDU you are taking your mail to. It will only be used for Standard Flat ECRRT mailings that are dropped off at the DDU.
    • DDUPostalCode - This property is the 9 digit zip code of the DDU post office. It will only be used for Standard Flat ECRRT mailings that are dropped off at the DDU.
    • The new data file is a Comma delimited file titled LocaleKey.csv. This new file will contain a list of every post office and its associated Locale Key. This file will be updated monthly along with all the other presort data files.

    • Build Compilation:

      The Windows DLLs have been compiled with the Visual Studio 2019 compiler. You no longer have to run the C++ Redistributables to use them.

Deprecated

  • None

Removed

  • None

Fixed

  • None

Security

  • None

2022.05

Released on: May 02, 2022

Presort Object Version 22421

Added

  • This update has a new version of Mail.dat, 22-1. Mail.dat version 19-1 is no longer accepted by the USPS.

Changed

  • The USPS is starting to push for Mailers to use Seamless Acceptance. In order for you to participate in Seamless Acceptance we added a few new properties and a new Data file to the Presort Object.
  • The Properties will be:
    • POMLocaleKey - This property will be required and is a 9-digit code based on your Post Office of Mailing.
    • DDULocaleKey - This property is a 9-digit code based on the DDU you are taking your mail to. It will only be used for Standard Flat ECRRT mailings that are dropped off at the DDU.
    • DDUPostalCode - This property is the 9 digit zip code of the DDU post office. It will only be used for Standard Flat ECRRT mailings that are dropped off at the DDU.
  • The new data file is a Comma delimited file titled LocaleKey.csv. This new file will contain a list of every post office and its associated Locale Key. This file will be updated monthly along with all the other presort data files.
  • The new January 2022 Hardcopy Postage Statements are included in this update.

  • Build Compilation:

    The Windows DLLs have been compiled with the Visual Studio 2019 compiler. You no longer have to run the C++ Redistributables to use them.

Deprecated

  • None

Removed

  • None

Fixed

  • None

Security

  • None

2022.04

Released on: April 01, 2022

Presort Object Version 22421

Added

  • This update has a new version of Mail.dat, 22-1. Mail.dat version 19-1 is no longer accepted by the USPS.

Changed

  • The USPS is starting to push for Mailers to use Seamless Acceptance. In order for you to participate in Seamless Acceptance we added a few new properties and a new Data file to the Presort Object.
  • The Properties will be:
    • POMLocaleKey - This property will be required and is a 9-digit code based on your Post Office of Mailing.
    • DDULocaleKey - This property is a 9-digit code based on the DDU you are taking your mail to. It will only be used for Standard Flat ECRRT mailings that are dropped off at the DDU.
    • DDUPostalCode - This property is the 9 digit zip code of the DDU post office. It will only be used for Standard Flat ECRRT mailings that are dropped off at the DDU.
  • The new data file is a Comma delimited file titled LocaleKey.csv. This new file will contain a list of every post office and its associated Locale Key. This file will be updated monthly along with all the other presort data files.

  • General Fixes and Changes:

    The new January 2022 Hardcopy Postage Statements are included in this update.

  • Build Compilation:

    The Windows DLLs have been compiled with the Visual Studio 2019 compiler. You no longer have to run the C++ Redistributables to use them.

Deprecated

  • None

Removed

  • None

Fixed

  • None

Security

  • None

2022.03

Released on: March 15, 2022

Presort Object Version 22421

Added

  • This update has a new version of Mail.dat, 22-1. Mail.dat version 19-1 is no longer accepted by the USPS.

Changed

  • The USPS is starting to push for Mailers to use Seamless Acceptance. In order for you to participate in Seamless Acceptance we added a few new properties and a new Data file to the Presort Object.

  • The Properties will be:

    • POMLocaleKey - This property will be required and is a 9-digit code based on your Post Office of Mailing.
    • DDULocaleKey - This property is a 9-digit code based on the DDU you are taking your mail to. It will only be used for Standard Flat ECRRT mailings that are dropped off at the DDU.
    • DDUPostalCode - This property is the 9 digit zip code of the DDU post office. It will only be used for Standard Flat ECRRT mailings that are dropped off at the DDU.

  • The new data file is a Comma delimited file titled LocaleKey.csv. This new file will contain a list of every post office and its associated Locale Key. This file will be updated monthly along with all the other presort data files.

  • General Fixes and Changes:

    The new January 2022 Hardcopy Postage Statements are included in this update.

  • Build Compilation

    The Windows DLLs have been compiled with the Visual Studio 2019 compiler. You no longer have to run the C++ Redistributables to use them.

Deprecated

  • None

Removed

  • None

Fixed

  • None

Security

  • None

2022.02

Released on: February 21, 2022

Presort Object Version 22421

Added

  • This update has a new version of Mail.dat, 22-1. Mail.dat version 19-1 is no longer accepted by the USPS.

Changed

  • The USPS is starting to push for Mailers to use Seamless Acceptance. In order for you to participate in Seamless Acceptance we added a few new properties and a new Data file to the Presort Object.
  • The Properties will be:
    • POMLocaleKey - This property will be required and is a 9-digit code based on your Post Office of Mailing.
    • DDULocaleKey - This property is a 9-digit code based on the DDU you are taking your mail to. It will only be used for Standard Flat ECRRT mailings that are dropped off at the DDU.
    • DDUPostalCode - This property is the 9 digit zip code of the DDU post office. It will only be used for Standard Flat ECRRT mailings that are dropped off at the DDU.
  • The new data file is a Comma delimited file titled LocaleKey.csv. This new file will contain a list of every post office and its associated Locale Key. This file will be updated monthly along with all the other presort data files.

  • General Fixes and Changes:

    The new January 2022 Hardcopy Postage Statements are included in this update.

  • Build Compilation:

    The Windows DLLs have been compiled with the Visual Studio 2019 compiler. You no longer have to run the C++ Redistributables to use them.

Deprecated

  • None

Removed

  • None

Fixed

  • None

Security

  • None

2022.01

Released on: January 20, 2022

The January 2022 Rates go into effect January 09, 2022.

Do NOT install the new rates unless you are finished mailing with the old rates.

Presort Object Version 22421

Added

  • This update has a new version of Mail.dat, 22-1. Mail.dat version 19-1 is no longer accepted by the USPS.

Changed

  • The USPS is starting to push for Mailers to use Seamless Acceptance. In order for you to participate in Seamless Acceptance we added a few new properties and a new Data file to the Presort Object.
  • The Properties will be:
    • POMLocaleKey - This property will be required and is a 9-digit code based on your Post Office of Mailing.
    • DDULocaleKey - This property is a 9-digit code based on the DDU you are taking your mail to. It will only be used for Standard Flat ECRRT mailings that are dropped off at the DDU.
    • DDUPostalCode - This property is the 9 digit zip code of the DDU post office. It will only be used for Standard Flat ECRRT mailings that are dropped off at the DDU.
  • The new data file is a Comma delimited file titled LocaleKey.csv. This new file will contain a list of every post office and its associated Locale Key. This file will be updated monthly along with all the other presort data files.

  • General Fixes and Changes:

    The new January 2022 Hardcopy Postage Statements are included in this update.

  • Build Compilation:

    The Windows DLLs have been compiled with the Visual Studio 2019 compiler. You no longer have to run the C++ Redistributables to use them.

Deprecated

  • None

Removed

  • None

Fixed

  • None

Security

  • None

2021.12

Released on: January 04, 2022

Presort Object Version 22421

Added

  • This update has a new version of Mail.dat, 22-1. Mail.dat version 19-1 is no longer accepted by the USPS.

Changed

  • The USPS is starting to push for Mailers to use Seamless Acceptance. In order for you to participate in Seamless Acceptance we added a few new properties and a new Data file to the Presort Object.
  • The Properties will be:
    • POMLocaleKey - This property will be required and is a 9-digit code based on your Post Office of Mailing.
    • DDULocaleKey - This property is a 9-digit code based on the DDU you are taking your mail to. It will only be used for Standard Flat ECRRT mailings that are dropped off at the DDU.
    • DDUPostalCode - This property is the 9 digit zip code of the DDU post office. It will only be used for Standard Flat ECRRT mailings that are dropped off at the DDU.

  • The new data file is a Comma delimited file titled LocaleKey.csv. This new file will contain a list of every post office and its associated Locale Key. This file will be updated monthly along with all the other presort data files.

  • Build Compilation:

    The Windows DLLs have been compiled with the Visual Studio 2019 compiler. You no longer have to run the C++ Redistributables to use them.

Deprecated

  • None

Removed

  • None

Fixed

  • None

Security

  • None

2021.11

Released on: December 09, 2021

Added

  • This update contains the new Postal rates that go into effect August 29 2021.

Changed

  • The USPS is starting to push for Mailers to use Seamless Acceptance. In order for you to participate in Seamless Acceptance we added a few new properties and a new Data file to the Presort Object.
  • The Properties will be:
    • POMLocaleKey - This property will be required and is a 9-digit code based on your Post Office of Mailing.
    • DDULocaleKey - This property is a 9-digit code based on the DDU you are taking your mail to. It will only be used for Standard Flat ECRRT mailings that are dropped off at the DDU.
    • DDUPostalCode - This property is the 9 digit zip code of the DDU post office. It will only be used for Standard Flat ECRRT mailings that are dropped off at the DDU.

  • The new data file is a Comma delimited file titled LocaleKey.csv. This new file will contain a list of every post office and its associated Locale Key. This file will be updated monthly along with all the other presort data files.

  • Build Compilation:

    The Windows DLLs have been compiled with the Visual Studio 2019 compiler. You no longer have to run the C++ Redistributables to use them.

Deprecated

  • None

Removed

  • None

Fixed

  • None

Security

  • None

2021.10

Released on: November 04, 2021

Added

  • This update contains the new Postal rates that go into effect August 29 2021.

Changed

  • The USPS is starting to push for Mailers to use Seamless Acceptance. In order for you to participate in Seamless Acceptance we added a few new properties and a new Data file to the Presort Object.
  • The Properties will be:
    • POMLocaleKey - This property will be required and is a 9-digit code based on your Post Office of Mailing.
    • DDULocaleKey - This property is a 9-digit code based on the DDU you are taking your mail to. It will only be used for Standard Flat ECRRT mailings that are dropped off at the DDU.
    • DDUPostalCode - This property is the 9 digit zip code of the DDU post office. It will only be used for Standard Flat ECRRT mailings that are dropped off at the DDU.

  • The new data file is a Comma delimited file titled LocaleKey.csv. This new file will contain a list of every post office and its associated Locale Key. This file will be updated monthly along with all the other presort data files.

  • Build Compilation:

    The Windows DLLs have been compiled with the Visual Studio 2019 compiler. You no longer have to run the C++ Redistributables to use them.

Deprecated

  • None

Removed

  • None

Fixed

  • None

Security

  • None

2021.09

Released on: October 06, 2021

Added

  • This update contains the new Postal rates that go into effect August 29 2021.

Changed

  • The USPS is starting to push for Mailers to use Seamless Acceptance. In order for you to participate in Seamless Acceptance we added a few new properties and a new Data file to the Presort Object.
  • The Properties will be:
    • POMLocaleKey - This property will be required and is a 9-digit code based on your Post Office of Mailing.
    • DDULocaleKey - This property is a 9-digit code based on the DDU you are taking your mail to. It will only be used for Standard Flat ECRRT mailings that are dropped off at the DDU.
    • DDUPostalCode - This property is the 9 digit zip code of the DDU post office. It will only be used for Standard Flat ECRRT mailings that are dropped off at the DDU.

  • The new data file is a Comma delimited file titled LocaleKey.csv. This new file will contain a list of every post office and its associated Locale Key. This file will be updated monthly along with all the other presort data files.

  • Build Compilation:

    The Windows DLLs have been compiled with the Visual Studio 2019 compiler. You no longer have to run the C++ Redistributables to use them.

Deprecated

  • None

Removed

  • None

Fixed

  • None

Security

  • None

2021.08

Released on: September 01, 2021

Added

  • This update contains the new Postal rates that go into effect August 29 2021.

Changed

  • The USPS is starting to push for Mailers to use Seamless Acceptance. In order for you to participate in Seamless Acceptance we added a few new properties and a new Data file to the Presort Object.
  • The Properties will be:
    • POMLocaleKey - This property will be required and is a 9-digit code based on your Post Office of Mailing.
    • DDULocaleKey - This property is a 9-digit code based on the DDU you are taking your mail to. It will only be used for Standard Flat ECRRT mailings that are dropped off at the DDU.
    • DDUPostalCode - This property is the 9 digit zip code of the DDU post office. It will only be used for Standard Flat ECRRT mailings that are dropped off at the DDU.

  • The new data file is a Comma delimited file titled LocaleKey.csv. This new file will contain a list of every post office and its associated Locale Key. This file will be updated monthly along with all the other presort data files.

  • Build Compilation:

    The Windows DLLs have been compiled with the Visual Studio 2019 compiler. You no longer have to run the C++ Redistributables to use them.

Deprecated

  • None

Removed

  • None

Fixed

  • None

Security

  • None

2021.07

Released on: August 17, 2021

Added

  • None

Changed

  • The USPS is starting to push for Mailers to use Seamless Acceptance. In order for you to participate in Seamless Acceptance we added a few new properties and a new Data file to the Presort Object.
  • The Properties will be:
    • POMLocaleKey - This property will be required and is a 9-digit code based on your Post Office of Mailing.
    • DDULocaleKey - This property is a 9-digit code based on the DDU you are taking your mail to. It will only be used for Standard Flat ECRRT mailings that are dropped off at the DDU.
    • DDUPostalCode - This property is the 9 digit zip code of the DDU post office. It will only be used for Standard Flat ECRRT mailings that are dropped off at the DDU.

  • The new data file is a Comma delimited file titled LocaleKey.csv. This new file will contain a list of every post office and its associated Locale Key. This file will be updated monthly along with all the other presort data files.

  • Build Compilation:

    The Windows DLLs have been compiled with the Visual Studio 2019 compiler. You no longer have to run the C++ Redistributables to use them.

Deprecated

  • None

Removed

  • None

Fixed

  • None

Security

  • None

Past Announcements

Presort Object Release Docs - August 31, 2023

Please see the new Presort Object Release Docs for additional documentation.

USPS Price Rates - April 10, 2023

The July 2023 rates are expected to take effect July 09, 2023.
To learn more about the upcoming changes, please visit USPS. 2023 Postage Price Changes.

Build Compilation - February 06, 2023

The Windows DLLs have been compiled with the Visual Studio 2019 compiler. You no longer have to run the C++ Redistributables to use them.

New Rates Notice - January 15, 2023

The January 2023 Rates took effect January 22, 2023. To learn more about the upcoming changes, please visit USPS - FAQs.

USPS PostalOne! Mail.dat Client Update - January 01, 2023

The USPS® is requiring a PostalOne!® Mail.Dat® Client Update that took effect on Sunday, January 08, 2023 to support the January 2023 Price changes effective January 22, 2023.

  • The new Mail.dat Client (57.0.0.0_PROD) can be downloaded from the USPS® Business Customer Gateway by clicking Sign in to the BCG to log in -> Click Mailing Services -> Click Go to Service next to Electronic Data Exchange (PostalOne!) -> Download the Mail.dat client application under Mail.dat Support for Production for your Operating System (32-bit or 64-bit).
  • For more information about the upcoming Mail.dat Client 57.0.0.0_PROD update, please visit: USPS PostalPro. January 08, 2023 Release Notes.