Mailers+4 Desktop

Important Announcements

None

General Information

Release Frequency: Monthly

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

Next Release Date: December 09, 2024

• Mailers+4 Desktop Release Docs
• Mailers+4 Reference Guide
• Mailers+4 Result Codes
• Mailers+4 FAQ
• Mailers+4 Quick Start Guide
• Mailers+4 Known issues
• Canadian Addresser Inclusion
• Support contact information: tech@melissa.com or 1-800-MELISSA (1-800-635-4772)

Build History

2024.11

Released on: November 04, 2024

Mailers+4 Build: 4.0.1.4309

COM Object	Build #
PresortObject	22511
AddressObject	17955
mdGeo	17333
PhoneObject	17325
NameObject	151

Presort	Date
Zone Table	11/01/2024
Delivery Statistics	09/23/2024
Module L Label Lists	11/01/2024
ELOT Table	10/01/2024

Database	Date
National Database	10/01/2024
Canadian Database	10/15/2024
FirstName Database	02/15/2000

• Mailers+4 Database Date: October 01, 2024.
• Database Expiration Date: January 31, 2025.

Added

• None

Changed

• None

Deprecated

• None

Removed

• None

Fixed

• None

Security

• None

2024.10

Released on: October 07, 2024

Mailers+4 Build: 4.0.1.4307

COM Object	Build #
PresortObject	22511
AddressObject	17955
mdGeo	17333
PhoneObject	17325
NameObject	151

Presort	Date
Zone Table	10/01/2024
Delivery Statistics	08/20/2024
Module L Label Lists	10/01/2024
ELOT Table	09/01/2024

Database	Date
National Database	09/01/2024
Canadian Database	09/15/2024
FirstName Database	02/15/2000

• Mailers+4 Database Date: September 01, 2024.
• Database Expiration Date: December 31, 2024.

Added

• None

Changed

• None

Deprecated

• None

Removed

• None

Fixed

• None

Security

• None

2024.09

Released on: September 09, 2024

Mailers+4 Build: 4.0.1.4307

COM Object	Build #
PresortObject	22505
AddressObject	17922
mdGeo	17333
PhoneObject	17325
NameObject	151

Presort	Date
Zone Table	09/01/2024
Delivery Statistics	07/22/2024
Module L Label Lists	09/01/2024
ELOT Table	08/01/2024

Database	Date
National Database	08/01/2024
Canadian Database	08/15/2024
FirstName Database	02/15/2000

• Mailers+4 Database Date: August 01, 2024.
• Database Expiration Date: November 30, 2024.

Added

• None

Changed

• None

Deprecated

• None

Removed

• None

Fixed

• None

Security

• None

2024.08

Released on: August 05, 2024

Mailers+4 Build: 4.0.1.4307

COM Object	Build #
PresortObject	22505
AddressObject	17922
mdGeo	17333
PhoneObject	17325
NameObject	151

Presort	Date
Zone Table	08/01/2024
Delivery Statistics	06/14/2024
Module L Label Lists	08/01/2024
ELOT Table	07/01/2024

Database	Date
National Database	07/01/2024
Canadian Database	07/15/2024
FirstName Database	02/15/2000

• Mailers+4 Database Date: July 01, 2024.
• Database Expiration Date: October 31, 2024.

Added

• None

Changed

• None

Deprecated

• None

Removed

• None

Fixed

• Fixed issue with Smartmover returning a blank zip code on certain records.
• Fixed issue with Postage statements returning the wrong value for the Full-Service incentive.

Security

• None

2024.07

Released on: July 08, 2024

Mailers+4 Build: 4.0.1.4303

COM Object	Build #
PresortObject	22502
AddressObject	17922
mdGeo	17333
PhoneObject	17325
NameObject	151

Presort	Date
Zone Table	07/01/2024
Delivery Statistics	05/15/2024
Module L Label Lists	07/01/2024
ELOT Table	06/01/2024

Database	Date
National Database	06/01/2024
Canadian Database	06/15/2024
FirstName Database	02/15/2000

• Mailers+4 Database Date: June 01, 2024.
• Database Expiration Date: September 30, 2024.

Added

• None

Changed

• None

Deprecated

• None

Removed

• None

Fixed

• Fixed issue with delivery points not matching USPS: New standard TotalDPS was being used (Page 51, https://postalpro.usps.com/mnt/glusterfs/2023-03/CASS_Tech_Guide_CycleO_0.pdf). However, USPS is not yet using it for IMBC.
• Fixed 2 issues with Mail.dat for Periodicals:
• Hdr file position 436 – 441
• CQT file position 33

Security

• None

2024.06

Released on: June 10, 2024

Mailers+4 Build: 4.0.1.4299

COM Object	Build #
PresortObject	22502
AddressObject	17824
mdGeo	17333
PhoneObject	17325
NameObject	151

Presort	Date
Zone Table	06/01/2024
Delivery Statistics	05/01/2024
Module L Label Lists	06/01/2024
ELOT Table	05/01/2024

Database	Date
National Database	05/01/2024
Canadian Database	05/15/2024
FirstName Database	02/15/2000

• Mailers+4 Database Date: May 01, 2024.
• Database Expiration Date: August 31, 2024.

Added

• None

Changed

• None

Deprecated

• None

Removed

• None

Fixed

• Presort Object updated with fix for Nonprofit residual pieces.

Security

• None

2024.05

Released on: May 06, 2024

Mailers+4 Build: 4.0.1.4299

COM Object	Build #
PresortObject	22501
AddressObject	17824
mdGeo	17333
PhoneObject	17325
NameObject	151

Presort	Date
Zone Table	05/01/2024
Delivery Statistics	03/16/2024
Module L Label Lists	05/01/2024
ELOT Table	04/01/2024

Database	Date
National Database	04/01/2024
Canadian Database	04/15/2024
FirstName Database	02/15/2000

• Mailers+4 Database Date: April 01, 2024.
• Database Expiration Date: July 31, 2024.

Added

• None

Changed

• None

Deprecated

• None

Removed

• None

Fixed

• None

Security

• None

2024.04

Released on: April 08, 2024

Mailers+4 Build: 4.0.1.4299

COM Object	Build #
PresortObject	22501
AddressObject	17801
mdGeo	17333
PhoneObject	17325
NameObject	151

Presort	Date
Zone Table	04/01/2024
Delivery Statistics	02/20/2024
Module L Label Lists	04/01/2024
ELOT Table	03/01/2024

Database	Date
National Database	03/01/2024
Canadian Database	03/15/2024
FirstName Database	02/15/2000

• Mailers+4 Database Date: March 01, 2024.
• Database Expiration Date: June 30, 2024.

Added

• None

Changed

• None

Deprecated

• None

Removed

• None

Fixed

• None

Security

• None

2024.03

Released on: March 04, 2024

Mailers+4 Build: 4.0.1.4299

COM Object	Build #
PresortObject	22501
AddressObject	17801
mdGeo	17333
PhoneObject	17325
NameObject	151

Presort	Date
Zone Table	03/01/2024
Delivery Statistics	01/22/2024
Module L Label Lists	03/01/2024
ELOT Table	02/01/2024

Database	Date
National Database	02/01/2024
Canadian Database	02/15/2024
FirstName Database	02/15/2000

• Mailers+4 Build number updated to 4.0.1.4299.
• Mailers+4 Database Date: February 01, 2024.
• Database Expiration Date: May 31, 2024.

Added

• None

Changed

• None

Deprecated

• None

Removed

• None

Fixed

• Fixed periodicals cqt file position in Mail.dat.

Security

• None

2024.02

Released on: February 05, 2024

Mailers+4 Build: 4.0.1.4297

COM Object	Build #
PresortObject	22501
AddressObject	17801
mdGeo	17333
PhoneObject	17325
NameObject	151

Presort	Date
Zone Table	02/01/2024
Delivery Statistics	12/15/2023
Module L Label Lists	02/01/2024
ELOT Table	01/01/2024

Database	Date
National Database	01/01/2024
Canadian Database	01/15/2024
FirstName Database	02/15/2000

• Mailers+4 Build number updated to 4.0.1.4297.
• Mailers+4 Database Date: January 01, 2024.
• Database Expiration Date: April 30, 2024.

Added

• None

Changed

• None

Deprecated

• None

Removed

• None

Fixed

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

Security

• None

2024.01

Released on: January 18, 2024

Mailers+4 Build: 4.0.1.4291

COM Object	Build #
PresortObject	22499
AddressObject	17800
mdGeo	17333
PhoneObject	17325
NameObject	151

Presort	Date
Zone Table	01/01/2024
Delivery Statistics	11/16/2023
Module L Label Lists	01/01/2024
ELOT Table	12/01/2023

Database	Date
National Database	12/01/2023
Canadian Database	12/15/2023
FirstName Database	02/15/2000

• Mailers+4 Build number updated to 4.0.1.4291.
• Mailers+4 Database Date: December 01, 2023.
• Database Expiration Date: March 31, 2024.

Added

• Mailers+4 (mp4_202312 - Build 4.0.1.4291) contains the latest January 2024 Postage Rates - Effective: January 21, 2024.
• Do Not install the new release with updated rates until all presorted mailings that require the previous rates are complete.
• Mailers+4 requires an update to Build 4291 to process mailings that will be submitted on or after January 21, 2024 in order to use the new Postal Rates and January 2024 Postage Statements.

• 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. * Please see the instructions to Upload Mail.dat files to PostalOne! for help.

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

Security

• None

Released on: January 08, 2024

Mailers+4 Build: 4.0.1.4289

COM Object	Build #
PresortObject	22481
AddressObject	17800
mdGeo	17333
PhoneObject	17325
NameObject	151

Presort	Date
Zone Table	01/01/2024
Delivery Statistics	11/16/2023
Module L Label Lists	01/01/2024
ELOT Table	12/01/2023

Database	Date
National Database	12/01/2023
Canadian Database	12/15/2023
FirstName Database	02/15/2000

• Mailers+4 Build number updated to 4.0.1.4289.
• Mailers+4 Database Date: December 01, 2023.
• Database Expiration Date: March 31, 2024.

Added

• None

Changed

• Database Update

Deprecated

• None

Removed

• None

Fixed

• None

Security

• None

2023.12

Released on: December 04, 2023

Mailers+4 Build: 4.0.1.4289

COM Object	Build #
PresortObject	22481
AddressObject	17763
mdGeo	17333
PhoneObject	17325
NameObject	151

Presort	Date
Zone Table	12/01/2023
Delivery Statistics	10/19/2023
Module L Label Lists	12/01/2023
ELOT Table	11/01/2023

Database	Date
National Database	11/01/2023
Canadian Database	11/15/2023
FirstName Database	02/15/2000

• Mailers+4 Build number updated to 4.0.1.4289.
• Mailers+4 Database Date: November 01, 2023.
• Database Expiration Date: February 29, 2024.

Added

• None

Changed

• Database Update

Deprecated

• None

Removed

• None

Fixed

• None

Security

• None

2023.11

Released on: November 06, 2023

Mailers+4 Build: 4.0.1.4289

COM Object	Build #
PresortObject	22476
AddressObject	17763
mdGeo	17333
PhoneObject	17325
NameObject	151

Presort	Date
Zone Table	11/01/2023
Delivery Statistics	09/13/2023
Module L Label Lists	11/01/2023
ELOT Table	10/01/2023

Database	Date
National Database	10/01/2023
Canadian Database	10/15/2023
FirstName Database	02/15/2000

• Mailers+4 Build number updated to 4.0.1.4289.
• Mailers+4 Database Date: October 01, 2023.
• Database Expiration Date: January 31, 2024.

Added

• None

Changed

• Database Update

Deprecated

• None

Removed

• None

Fixed

• First Class - Flats issue resolved.
• Duplicate Check issue resolved.

Security

• None

2023.10

Released on: October 09, 2023

Mailers+4 Build: 4.0.1.4285

COM Object	Build #
PresortObject	22474
AddressObject	17763
mdGeo	17333
PhoneObject	17325
NameObject	151

Presort	Date
Zone Table	10/01/2023
Delivery Statistics	08/17/2023
Module L Label Lists	10/01/2023
ELOT Table	09/01/2023

Database	Date
National Database	09/01/2023
Canadian Database	09/15/2023
FirstName Database	02/15/2000

• Mailers+4 Build number remained 4.0.1.4285.
• Mailers+4 Database Date: September 01, 2023.
• Database Expiration Date: December 31, 2023.

Added

• None

Changed

• Database Update

Deprecated

• None

Removed

• None

Fixed

• Resolved issue where Mail Owner - "Permit Type" field did not save in Template. Mailers+4 [Build #4.0.1.4285] saves the Mail Owner - Permit Type in the saved template and correctly populates Maildat file Field Code: MPA-1108 -Position 83-83.
• Resolved ACS Code error. Move Method(s): "NCOALink, Ancillary Service, Alternative, Multiple, None, or N/A Alternative Address" with Full Service: ON will no longer trigger the ACS Code error message: "Move Update Method or ACS code is not set. Please refer to the manual" during Presort.

Security

• None

2023.09

Released on: September 05, 2023

Mailers+4 Build: 4.0.1.4276

COM Object	Build #
PresortObject	22470
AddressObject	17763
mdGeo	17333
PhoneObject	17325
NameObject	151

Presort	Date
Zone Table	09/01/2023
Delivery Statistics	07/12/2023
Module L Label Lists	09/01/2023
ELOT Table	08/01/2023

Database	Date
National Database	08/01/2023
Canadian Database	08/15/2023
FirstName Database	02/15/2000

• Mailers+4 Build number remained 4.0.1.4276.
• Mailers+4 Database Date: August 01, 2023.
• Database Expiration Date: November 30, 2023.

Added

• None

Changed

• Database Update

Deprecated

• None

Removed

• None

Fixed

• Fixed issue for Mail.dat .CSM file (CSM-1152) - Destination line 1 -Left Justified.
• Fixed issue with Maildat .HDR file (HDR-1178) Piece Barcode Record Count matching the Piece Barcode file.

Security

• None

2023.08

Released on: August 07, 2023

Mailers+4 Build: 4.0.1.4274

COM Object	Build #
PresortObject	22466
AddressObject	17731
mdGeo	17333
PhoneObject	17214
NameObject	151

Presort	Date
Zone Table	08/01/2023
Delivery Statistics	06/14/2023
Module L Label Lists	08/01/2023
ELOT Table	07/01/2023

Database	Date
National Database	07/01/2023
Canadian Database	07/15/2023
FirstName Database	02/15/2000

• Mailers+4 Build number remained 4.0.1.4274.
• Mailers+4 Database Date: July 01, 2023.
• Database Expiration Date: October 31, 2023.

Added

• Mailers+4 (mp4_202307 - Build 4.0.1.4274) includes the USPS CASS Cycle O changes that take effect August 1, 2023.

Changed

• Database Update

Deprecated

• None

Removed

• None

Fixed

• Mailers+4 (mp4_202307 - Build 4.0.1.4274) includes Nonprofit Postage Statement fixes.
• Mailers+4 (mp4_202307 - Build 4.0.1.4274) includes Print Label fixes.

Security

• None

2023.07

Released on: July 10, 2023

Mailers+4 Build: 4.0.1.4266

COM Object	Build #
PresortObject	22466
AddressObject	17728
mdGeo	17333
PhoneObject	17214
NameObject	151

Presort	Date
Zone Table	07/01/2023
Delivery Statistics	05/18/2023
Module L Label Lists	07/01/2023
ELOT Table	06/01/2023

Database	Date
National Database	06/01/2023
Canadian Database	06/15/2023
FirstName Database	02/15/2000

• Mailers+4 Build number remained 4.0.1.4266.
• Mailers+4 Database Date: June 01, 2023.
• Database Expiration Date: September 30, 2023.

Added

• July 2023 Postage Rates - Effective: July 09, 2023.

• [Address Check] New Enhanced DPV Result Codes available in Address Check! In order to retrieve the new CASS Codes, click "Format" -> Select "Address" tab -> Click "Enhanced DPV" to view and format New Enhanced DPV fields.

  Field Name	Length
  Vacant	1 character
  ZIP Included in 3553	1 character
  Drop Indicator	1 character
  Throw Back	1 character
  Delivery Days	28 characters
  No Stat Indicator	1 character
  No Stat Reason Code	2 characters
  DPV Confirmation Code	1 character
  Enhanced DPV Code	1 character
  No Secure Location	1 character
  Door Not Accessible	1 character
  False Table	1 character
  PBSA	1 character
  CMRA	1 character

Changed

• Database Update

• Mailers+4 Desktop (Build 4.0.1.4266 - Database Date: June 01, 2023) includes the new Postal Rate updates that take effect: July 09, 2023.

  • Mailers+4 requires an update to Build 4.0.1.4266 to process mailings that will be submitted on or after July 09, 2023 in order to use the new Postal Rates and July 2023 Postage Statements.
  • For PostalOne! E-Doc submitters, a new Mail.dat client (58.0.0.0_PROD) will be required for submissions that include a Mailing Date of July 09, 2023 or after. 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.

• Please see the following known issue for USPS Marketing Mail Letters - Postage Statement 3602-R - Line B30. MAILERS+4 Known issues

Deprecated

• None

Removed

• Mailers+4 Desktop (Build 4.0.1.4266 - Database Date: June 01, 2023) no longer includes the following files (msxml4.dll, msxml4a.dll, msxml4r.dll) in the “System32” folder.

Fixed

• [Print Labels] Mailers+4 Desktop (Build 4.0.1.4266 - Database Date: June 01, 2023) no longer truncates lowercase letters (“yqpgj” ) present in the Company or Full Name fields in the Print Labels feature!

Security

• None

2023.06

Released on: June 05, 2023

Mailers+4 Build: 4.0.1.4250

COM Object	Build #
PresortObject	22452
AddressObject	17552
mdGeo	17333
PhoneObject	17214
NameObject	151

Presort	Date
Zone Table	06/01/2023
Delivery Statistics	04/13/2023
Module L Label Lists	06/01/2023
ELOT Table	05/01/2023

Database	Date
National Database	05/01/2023
Canadian Database	05/15/2023
FirstName Database	02/15/2000

• Mailers+4 Build number remained 4.0.1.4250.
• Mailers+4 Database Date: May 01, 2023.
• Database Expiration Date: August 31, 2023.

Added

• None

Changed

• Database Update

Deprecated

• None

Removed

• None

Fixed

• None

Security

• None

2023.05

Released on: May 08, 2023

Mailers+4 Build: 4.0.1.4250

COM Object	Build #
PresortObject	22452
AddressObject	17552
mdGeo	17333
PhoneObject	17214
NameObject	151

Presort	Date
Zone Table	05/01/2023
Delivery Statistics	03/16/2023
Module L Label Lists	05/01/2023
ELOT Table	04/01/2023

Database	Date
National Database	04/01/2023
Canadian Database	04/15/2023
FirstName Database	02/15/2000

• Mailers+4 Build number updated to 4.0.1.4250.
• Mailers+4 Database Date: April 01, 2023.
• Database Expiration Date: July 31, 2023.

Added

• New method to update.

Changed

• Melissa Updater implemented, but is not automatic at this time. Click "Help" - "Check for updates" in order to update. FTP is no longer available
• About Mailers+4 (Help-About Mailers+4) window updated Mailers+4 Build to 4.0.1.4250 and release 10.1 (from 10).

Deprecated

• None

Removed

• FTP is no longer available.
• Removed Phone Object (PhoneObj.dll) from Mailers+4 release (4.0.1.4250) because it is no longer in use.

Fixed

• None

Security

• None

2023.04

Released on: April 10, 2023

Mailers+4 Build: 4247

COM Object	Build #
PresortObject	22452
AddressObject	17552
mdGeo	17333
PhoneObject	17214
NameObject	151

Presort	Date
Zone Table	04/01/2023
Delivery Statistics	02/16/2023
Module L Label Lists	04/01/2023
ELOT Table	03/01/2023

Database	Date
National Database	03/01/2023
Canadian Database	03/15/2023
FirstName Database	02/15/2000

• Mailers+4 Build number updated to 4247.
• Mailers+4 Database Date: March 01, 2023.
• Database Expiration Date: June 30, 2023.

Added

• None

Changed

• The SmartMover Error - “SE17” triggered by List Names longer than 30 characters has been updated to describe the error: “ListName Character Limit (SE17). The File Name and File Type must be less than 30 characters in length.”

Deprecated

• None

Removed

• None

Fixed

• None

Security

• None

2023.03

Released on: March 06, 2023

Mailers+4 Build: 4241

COM Object	Build #
PresortObject	22452
AddressObject	17552
mdGeo	17333
PhoneObject	17214
NameObject	151

Presort	Date
Zone Table	03/01/2023
Delivery Statistics	01/24/2023
Module L Label Lists	02/01/2023
ELOT Table	02/01/2023

Database	Date
National Database	02/01/2023
Canadian Database	02/15/2023
FirstName Database	02/15/2000

• Mailers+4 Build number updated to 4241.
• Mailers+4 Database Date: February 01, 2023.
• Database Expiration Date: May 31, 2023.

Added

• This build (4241) includes a new Setup.exe that combines Mailers+4 Desktop Professional, Server and GeoCoder add-on all-in-one. Please see the new instructions here Mailers+4: Installation

Changed

• For Mailers+4 Server users, the name of the download has changed from mp4Svr_YYYYMM to mp4_YYYYMM. The new setup.exe includes an option to install to a shared directory.

Deprecated

• None

Removed

• None

Fixed

• Mailers+4 - Build 4241 includes the corrected postage statements for the Sack Elimination rules for Periodical and USPS Marketing Mail Flats in Trays.

Security

• None

2023.02

Released on: February 21, 2023

Mailers+4 Build: 4240

COM Object	Build #
PresortObject	22452
AddressObject	17552
mdGeo	17333
PhoneObject	17214
NameObject	151

Presort	Date
Zone Table	03/01/2023
Delivery Statistics	01/24/2023
Module L Label Lists	02/01/2023
ELOT Table	02/01/2023

Database	Date
National Database	02/01/2023
Canadian Database	02/15/2023
FirstName Database	02/15/2000

• Mailers+4 Build number updated to 4240.
• Mailers+4 Database Date: February 01, 2023.
• Database Expiration Date: May 31, 2023.

Added

• None

Changed

• None

Deprecated

• None

Removed

• None

Fixed

• Sack Elimination Requirement for USPS Marketing Mail and Periodical Flats implemented in mp4_202302 - Build 4240 released on February 21, 2023.

Security

• None

Released on: February 06, 2023

Mailers+4 Build: 4231

COM Object	Build #
PresortObject	22447
AddressObject	17552
mdGeo	17333
PhoneObject	17214
NameObject	151

Presort	Date
Zone Table	02/01/2023
Delivery Statistics	12/14/2022
Module L Label Lists	02/01/2023
ELOT Table	01/01/2023

Database	Date
National Database	01/01/2023
Canadian Database	01/15/2023
FirstName Database	02/15/2000

• Mailers+4 Build number updated to 4231.
• Mailers+4 Database Date: January 01, 2023.
• Database Expiration Date: April 31, 2023.

Added

• This release contains the latest January 2023 Postage Rates – Effective: January 22, 2023.

  • Do Not install the new release with updated rates until all presorted mailings that require the previous rates are complete.

  • 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

• File name updated from mp4_202212 (released January 20, 2023) to mp4_202301.

Deprecated

• None

Removed

• None

Fixed

• File name corrected to mp4_202301 (from mp4_202212 released on January 20, 2023. This release included the January 2023 Price Rates with the January 01, 2023 Database Date)

Security

• None

2023.01

Released on: January 26, 2023

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

Mailers+4 Build: 4231

COM Object	Build #
PresortObject	22447
AddressObject	17552
mdGeo	17333
PhoneObject	17214
NameObject	151

Presort	Date
Zone Table	02/01/2023
Delivery Statistics	12/14/2022
Module L Label Lists	02/01/2023
ELOT Table	01/01/2023

Database	Date
National Database	01/01/2023
Canadian Database	01/15/2023
FirstName Database	02/15/2000

• Mailers+4 Build number updated to 4231.
• Mailers+4 Database Date: January 01, 2023.
• Database Expiration Date: April 30, 2023.

Added

• This release contains the latest January 2023 Postage Rates – Effective: January 22, 2023.

  • Do Not install the new release with updated rates until all presorted mailings that require the previous rates are complete.

  • 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

• Database Update

• USPS January 2023 Price Update implemented.

Deprecated

• None

Removed

• None

Fixed

• None

Security

• None

Released on: January 09, 2023

Mailers+4 Build: 4213

COM Object	Build #
PresortObject	22436
AddressObject	17552
mdGeo	17333
PhoneObject	17214
NameObject	151

Presort	Date
Zone Table	01/01/2023
Delivery Statistics	11/16/2022
Module L Label Lists	01/01/2023
ELOT Table	12/01/2022

Database	Date
National Database	12/01/2022
Canadian Database	12/15/2022
FirstName Database	02/15/2000

• Mailers+4 Build number remained 4213.
• Mailers+4 Database Date: December 01, 2022.
• Database Expiration Date: March 31, 2023.

Added

• None

Changed

• Database Update
• The CASS Form 3553 PDF generated by Address Check has been updated to September 2022 (previously August 2017 facsimile).

Deprecated

• The Mailers+4 Desktop Standard version deprecated on January 01, 2023. All active Standard accounts will be updated to Professional version for the remainder of the subscription. To learn more about the deprecation and alternatives, please see Product Advisory.

Removed

• None

Fixed

• Resolved issue with the generated CASS Form 3553 from Address Check printing text too lightly.

Security

• None

2022.12

Released on: December 05, 2022

Mailers+4 Version 4213

COM Object	Build #
PresortObject	22436
AddressObject	17552
mdGeo	17333
PhoneObject	17214
NameObject	151

Presort	Date
Zone Table	12/01/2022
Delivery Statistics	10/14/2022
Module L Label Lists	12/01/2022
ELOT Table	11/01/2022

Database	Date
National Database	11/01/2022
Canadian Database	11/15/2022
FirstName Database	02/15/2000

• Mailers+4 Build number increased to 4213.
• Mailers+4 Database Date: November 01, 2022.
• Database Expiration Date: February 28, 2023.

Added

• None

Changed

• Database Update
• Mailers+4 Build Update to 4213
• AddressObject Build Update to 17552

Deprecated

• None

Removed

• None

Fixed

• Help - TechEase Portal Website Link fixed.
• Resolved issue with [Address Check - CASS Form 3553] Adobe Reader error message: There was an error opening this document. This file cannot be found.

Security

• None

2022.11

Released on: November 07, 2022

Mailers+4 Version 4179

COM Object	Build #
PresortObject	22436
AddressObject	17499
mdGeo	17333
PhoneObject	17214
NameObject	151

Presort	Date
Zone Table	11/01/2022
Delivery Statistics	09/13/2022
Module L Label Lists	11/01/2022
ELOT Table	10/01/2022

Database	Date
National Database	10/01/2022
Canadian Database	10/15/2022
FirstName Database	02/15/2000

• Mailers+4 Build number increased to 4179.
• Mailers+4 Database Date: October 01, 2022.
• Database Expiration Date: January 31, 2022.

Added

• Help > Mailers+4 Information window:

  • Canadian Database Date has been added for referencein Mailers+4 Build 4179.
  • The entire window has been extended vertically for easy viewing.

Changed

• Database Update
• Mailers+4 Build Update to 4179
• The Help > About Mailers+4 window has been updated to reflect required CASS Changes for Database Date, which will now display the first of each month instead of the 15th.
• The CASS Form 3553 pdf generated by Address Check has been updated to August 2022 (previously August 2017 facsimile).

Deprecated

• None

Removed

• None

Fixed

• None

Security

• None

2022.09

Released on: September 06, 2022

Mailers+4 Version 4174

COM Object	Build #
PresortObject	22436
AddressObject	17499
mdGeo	17333
PhoneObject	17214
NameObject	151

Presort	Date
Zone Table	09/01/2022
Delivery Statistics	07/13/2022
Module L Label Lists	09/01/2022
ELOT Table	08/15/2022

Database	Date
National Database	08/15/2022
FirstName Database	02/15/2000

• Mailers+4 Build number increased to 4174.
• Mailers+4 Database Date: August 15, 2022.
• Database Expiration Date: November 30, 2022.

Added

• None

Changed

• Database Update
• Presort Object Build updated to 22436.
• GeoCoder Object build updated to 17333.

Deprecated

• None

Removed

• None

Fixed

• None

Security

• None

2022.08

Released on: July 26, 2022

Mailers+4 Version 4153

COM Object	Build #
PresortObject	22432
AddressObject	17499
mdGeo	17260
PhoneObject	17214
NameObject	151

Presort	Date
Zone Table	08/01/2022
Delivery Statistics	06/16/2022
Module L Label Lists	08/01/2022
ELOT Table	07/15/2022

Database	Date
National Database	07/15/2022
FirstName Database	02/15/2000

• Mailers+4 Build number remained 4153.
• Mailers+4 Database Date: July 15, 2022.
• Database Expiration Date: October 31, 2022.

Added

• None

Changed

• Database Update
• Address Object Build updated to 17499.
• Phone Object Build corrected back to 17214.

Deprecated

• None

Removed

• None

Fixed

• None

Security

• None

2022.07

Released on: July 08, 2022

Mailers+4 Version 4153

COM Object	Build #
PresortObject	22432
AddressObject	17383
mdGeo	17260
PhoneObject	17167
NameObject	151

Presort	Date
Zone Table	07/01/2022
Delivery Statistics	05/25/2022
Module L Label Lists	07/01/2022
ELOT Table	06/15/2022

Database	Date
National Database	06/15/2022
FirstName Database	02/15/2000

• Mailers+4 Build number increased to 4153.
• Mailers+4 Database Date: June 15, 2022.
• Database Expiration Date: September 30, 2022.

Added

• None

Changed

• Mailers+4 includes the new Postal Rate updates that take effect: July 10, 2022.
  • Mailers+4 requires an update to Build 4153 to process mailings that will be submitted on or after July 10, 2022 in order to use the new Postal Rates and July 2022 Postage Statements.
  • For PostalOne! E-Doc submitters, a new Mail.dat client (55.0.0.0_PROD) will be required for submissions that include a Mailing Date of July 10, 2022 or after. 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.

Deprecated

• None

Removed

• None

Fixed

• None

Security

• None

2022.05

Released on: May 02, 2022

Mailers+4 Version 4149

COM Object	Build #
PresortObject	22421
AddressObject	17426
mdGeo	17260
PhoneObject	17214
NameObject	151

Presort	Date
Zone Table	05/01/2022
Delivery Statistics	03/17/2022
Module L Label Lists	05/01/2022
ELOT Table	04/15/2022

Database	Date
National Database	04/15/2022
FirstName Database	02/15/2000

• Mailers+4 Build number increased to 4149.
• Mailers+4 Database Date: April 15, 2022.
• Database Expiration Date: July 31, 2022.
• Address Object Build increased to 17426.
• Phone Object Build increased to 17214.

Added

• None

Changed

• The mdCBSA.dat & mdCbsa.idx files have been removed and replaced by mdCbsa.db3. This resolved the issue with Address Check crashing and the pop-up "Warning: CBSA Data file is missing. Do you wish to continue?[Yes/No]" This no longer happens.

Deprecated

• None

Removed

• None

Fixed

• None

Security

• None

2022.04

Released on: April 01,2022

Mailers+4 Version 4148

COM Object	Build #
PresortObject	22421
AddressObject	17383
mdGeo	17260
PhoneObject	17167
NameObject	151

Presort	Date
Zone Table	04/01/2022
Delivery Statistics	02/16/2022
Module L Label Lists	04/01/2022
ELOT Table	03/15/2022

Database	Date
National Database	03/15/2022
FirstName Database	02/15/2000

• Mailers+4 Build number increased to 4148.
• Mailers+4 Database Date: March 15, 2022.
• Database Expiration Date: June 30, 2022.

Added

• None

Changed

• Canadian Addresser - This update [Mailers+4 - Build 4148 - mp4_202203] includes Canadian Addresser in the installer by default and will no longer require a workaround to update the Canadian Database.
  • The "Canadian Addresser add-on" menu item has been removed from the List dropdown in Mailers+4 Build 4148.
  • "Canada Data" and "RBDI" File Paths have been removed Under "Tools > System Options > File Paths > Directories". Canada Data and RBDI Data now use the same File path as US Data.
• Periodicals - The Periodicals Hardcopy Postage Statement (PS_3541) has been corrected back to January 2022 changes.

Deprecated

• None

Removed

• None

Fixed

• Mailers+4 - SmartMover - The Unexpected Error: Unhandled Exception crash has been resolved in Mailers+4.
  • The mp4patch.exe that was released on 03/31/2022 is no longer required.
• Mailers+4 - SmartMover - Exclamation Error resolved when processing a large amount of files.

Security

• None

2022.02

Released on: February 21, 2022

Mailers+4 Version 4120

COM Object	Build #
PresortObject	22421
AddressObject	17341
mdGeo	17260
PhoneObject	17167
NameObject	151

Presort	Date
Zone Table	03/01/2022
Delivery Statistics	01/26/2022
Module L Label Lists	03/01/2022
ELOT Table	02/15/2022

Database	Date
National Database	02/15/2022
FirstName Database	02/15/2000

• Maintenance update
• Mailers+4 Build number remained 4120.
• Mailers+4 Database Date: February 15, 2022
• Database Expiration Date: May 31, 2022.

Added

• None

Changed

• None

Deprecated

• None

Removed

• None

Fixed

• None

Security

• None

2022.01

Released on: January 11, 2022

Mailers+4 Version 4118

COM Object	Build #
PresortObject	22419
AddressObject	17341
mdGeo	17260
PhoneObject	17167
NameObject	151

Presort	Date
Zone Table	01/01/2022
Delivery Statistics	11/17/2021
Module L Label Lists	01/01/2022
ELOT Table	12/15/2021

Database	Date
National Database	12/15/2021
FirstName Database	02/15/2000

• Mailers+4 Build number increased to 4118.

Added

• None

Changed

• Maildat version update to 22-1.

  Please Note:

  • The updated Maildat version 22-1 files are supported in PostalOne! System Release 54.0.0.0 Mail.dat client.
  • Hardcopy Postage Statements for Mailers+4 are being updated and will be released as soon as possible.

Deprecated

• None

Removed

• None

Fixed

• None

Security

• None

2021.12

Released on: December 06, 2021

Mailers+4 Version 4109

COM Object	Build #
PresortObject	22410
AddressObject	17341
mdGeo	17260
PhoneObject	17167
NameObject	151

Presort	Date
Zone Table	12/01/2021
Delivery Statistics	10/13/2021
Module L Label Lists	12/01/2021
ELOT Table	11/15/2021

Database	Date
National Database	11/15/2021
FirstName Database	02/15/2000

• Mailers+4 Build number increased to 4109.

Added

• None

Changed

• Periodicals – Flats –Postage Statement (PS 3541): Line E17 - Price corrected

Deprecated

• None

Removed

• None

Fixed

• None

Security

• None

2021.10

Released on: October 13, 2021

Mailers+4 Version 4100

COM Object	Build #
PresortObject	22408
AddressObject	17341
mdGeo	17260
PhoneObject	17167
NameObject	151

Presort	Date
Zone Table	10/01/2021
Delivery Statistics	08/18/2021
Module L Label Lists	10/01/2021
ELOT Table	09/15/2021

Database	Date
National Database	09/15/2021
FirstName Database	02/15/2000

• Mailers+4 Build number increased to 4100.

Added

• None

Changed

• ZIP*USA DEMO Mode is no longer triggered by Mailers+4 in this build, which includes the new Address Object - Build #17341.

Deprecated

• None

Removed

• None

Fixed

• None

Security

• None

2021.09

Released on: September 17, 2021

Mailers+4 Version 4099

COM Object	Build #
PresortObject	22404
AddressObject	17207
mdGeo	17260
PhoneObject	17167
NameObject	151

Presort	Date
Zone Table	09/01/2021
Delivery Statistics	07/14/2021
Module L Label Lists	09/01/2021
ELOT Table	07/15/2021

Database	Date
National Database	08/15/2021
FirstName Database	02/15/2000

• Mailers+4 Build number increased to 4099.

Added

• None

Changed

• First Class - Flats - Postage Statement: Line B14 corrected.
• First Class - Postcard New Maximum Size implemented (6 inch high x 9 inch long Thickness: 0.009 - 0.016). Please see the USPS - Larger Sized Presorted or Automation First-Class Mail® Postcard - Frequently Asked Questions for additional information.

Deprecated

• None

Removed

• None

Fixed

• None

Security

• None

2021.08

Released on: August 13, 2021

Mailers+4 Version 4096

COM Object	Build #
PresortObject	22397
AddressObject	17207
mdGeo	17260
PhoneObject	17167
NameObject	151

Presort	Date
Zone Table	09/01/2021
Delivery Statistics	07/14/2021
Module L Label Lists	09/01/2021
ELOT Table	07/15/2021

Database	Date
National Database	07/15/2021
FirstName Database	02/15/2000

• Mailers+4 Build number increased to 4096.

Added

• The August 2021 Rates-Patch has been released.
  • The new Rates-Patch can be downloaded from the Mailers+4 Wiki Product Page under Current.
  • Please see the Product Advisory for additional August 2021 Price rate information.

Changed

• None

Deprecated

• None

Removed

• None

Fixed

• First Class - Postage Statements: Negative numbers and Total Mailpiece discrepancy corrected.

Security

• None

2021.07

Released on: July, 2021

Mailers+4 Version 4088

COM Object	Build #
PresortObject	22378
AddressObject	17296
mdGeo	17260
PhoneObject	17167
NameObject	151

Presort	Date
Zone Table	07/01/2021
Delivery Statistics	05/22/2021
Module L Label Lists	07/01/2021
ELOT Table	06/15/2021

Database	Date
National Database	06/15/2021
FirstName Database	02/15/2000

• Mailers+4 Build number increased to 4088.

Added

• None

Changed

• Updated the Quick list field lengths for SEQ, LOT_NUM, CBSALEVEL, and CBSADIVLVL under Database - Modify to correct Auto-format issue.

Deprecated

• ​SmartMover will no longer remove Delivery Addresses after NCOALink processing when the “Suite” field is formatted.

Removed

• None

Fixed

• Fixed the Address Swapping issue when using Text (.txt) files.

Security

• None

2021.06

Released on: June, 2021

Mailers+4 Version 4085

COM Object	Build #
PresortObject	22378
AddressObject	17236
mdGeo	17260
PhoneObject	17167
NameObject	151

Presort	Date
Zone Table	06/01/2021
Delivery Statistics	04/17/2021
Module L Label Lists	06/01/2021
ELOT Table	05/15/2021

Database	Date
National Database	05/15/2021
FirstName Database	02/15/2000

• Mailers+4 Build number increased to 4085

Added

• Added Quick List Items: GeoCoder, ELOT, CBSA and NameParse.

Changed

• Mailers+4 – Database-Modify

  • In order to help users easily add and auto-format beneficial fields, the following adjustments have been made to the Quick-Edit list in Database-Modify:
    • Modified Quick List items: Common Fields, Presort, and Change of Address.

• Mailers+4 – SmartMover

  • Plus4 not added to ZIP Code field - Updated.
    • Mailers+4 Build 4078 did not automatically add the “Plus4” to the 10-digit ZIP Code field, and would only append to a separate “Plus4” field that was formatted.
    • This was updated in Mailers+4 build 4085. The Plus4 field will append to the 10-digit ZIP field in Mailers+4 build 4085 if a separate Plus4 field is not present or formatted.

• Suite not added to Address Field – Updated.

  • Mailers+4 Build 4078 did not automatically add the “Suite” to the Address1 (Delivery Address) field if there was not a Suite field formatted separately.
  • This was updated in Mailers+4 build 4085. If there is no separate “Suite” field formatted in Mailers+4, the Suite will be appended to Address1.

• Mailers+4 – Name Parse

  • Mailers+4 build 4078 had an issue with the Name Parse feature returning a high-volume of Vulgar results.

Deprecated

• None

Removed

• Removed Quick List items: Address Check, Advanced Fields, Demographic, Phone & Fax Append, Residential Address, Address Correction, SIC Coder and Consumer Enhancement.

Fixed

• Name Parse issue returning vulgar results - Fixed.
• This was fixed in Mailers+4 build 4085, and Name Parse is no longer returning incorrect Vulgar results.

Security

• None

2021.05

Released on: May, 2021

Mailers+4 Version 4078

COM Object	Build #
PresortObject	22378
AddressObject	17236
mdGeo	17260
PhoneObject	17167
NameObject	17048

Presort	Date
Zone Table	05/01/2021
Delivery Statistics	03/21/2021
Module L Label Lists	05/01/2021
ELOT Table	04/15/2021

Database	Date
National Database	04/15/2021
FirstName Database	N/A

• Mailers+4 Build number increased to 4078

Added

• Added new SmartMover Processing screen, Help, and Results Window.
• Added new Services Menu Item: Listware Online to provide access to Demographic appends previously provided by Listware Classic.
• New Wiki pages added:
  • Mailers+4 Wiki: SmartMover FAQ
  • Mailers+4 Wiki: SmartMover Tutorial
  • Mailers+4 Wiki: Known Issues

Changed

• The new SmartMover update has been released in Build 4078 and now utilizes SmartMover Web Service, which allows real-time processing of files instead of waiting for an email confirmation to update.
  • Updated the Format Fields display to reflect new NCOALink Format Options available. Click Format Fields - Select NCOA tab.
  • Required CASS Form 3553 and NCOALink Summary Reports will now automatically save to the same folder as processed file. They can also be easily viewed by clicking their respective buttons found on the SmartMover results window.
  • Processed files can now return to the View Results window by clicking the SmartMover button and selecting View results.

Deprecated

• None

Removed

• Listware Classic has been removed in build 4078.
• Mailers+4 - Services menu items have been removed: Phone & Fax Append; Address Correction; Residential Address Append; Business Append; Consumer Enhancements; and Update List.

Fixed

• Fixed issue with incorrect calculation for E17 on Periodical Postage Statements.

Security

• None

2021.04

Released on: April, 2021

Mailers+4 Version 3837

COM Object	Build #
PresortObject	22378
AddressObject	17207
mdGeo	17187
PhoneObject	3145
NameObject	151

Presort	Date
Zone Table	04/01/2021
Delivery Statistics	02/20/2021
Module L Label Lists	04/01/2021
ELOT Table	03/15/2021

Database	Date
National Database	03/15/2021
FirstName Database	03/15/2021

• The Presort Object Build number updated to 22378

Added

• A new file has been added to the Mailers+4 updates: LocaleKey.csv
  • This file is for Seamless Acceptance mailers and can be found in the following directory: mp4_202103/Data/LocaleKey.csv

Changed

• None

Deprecated

• None

Removed

• None

Fixed

• None

Security

• None

2021.03

Released on: March, 2021

Mailers+4 Version 3837

COM Object	Build #
PresortObject	22376
AddressObject	17207
mdGeo	17187
PhoneObject	3145
NameObject	151

Presort	Date
Zone Table	03/01/2021
Delivery Statistics	02/01/2021
Module L Label Lists	03/01/2021
ELOT Table	02/15/2021

Database	Date
National Database	02/15/2021
FirstName Database	02/15/2000

• The Presort Object Build number updated to 22376

Added

• None

Changed

• None

Deprecated

• None

Removed

• None

Fixed

• None

Security

• None

2021.02

Released on: February, 2021

Mailers+4 Version 3837

COM Object	Build #
PresortObject	22374
AddressObject	17207
mdGeo	17187
PhoneObject	3145
NameObject	151

Presort	Date
Zone Table	02/01/2021
Delivery Statistics	12/27/2020
Module L Label Lists	02/01/2021
ELOT Table	01/15/2021

Database	Date
National Database	01/15/2021
FirstName Database	02/15/2000

• The Presort Object Build number updated to 22374

Added

• None

Changed

• None

Deprecated

• None

Removed

• None

Fixed

• Fixed the issue where the Record Count did not match between the .PBC and the .HDR Maildat files.

Security

• None

2021.01

Released on: January, 2021

Mailers+4 Version 3837

COM Object	Build #
PresortObject	22374
AddressObject	17207
mdGeo	17187
PhoneObject	3145
NameObject	151

Presort	Date
Zone Table	02/01/2021
Delivery Statistics	12/27/2020
Module L Label Lists	02/01/2021
ELOT Table	12/15/2020

Database	Date
National Database	12/15/2020
FirstName Database	02/15/2000

• Mailers+4 Build 3837 contains the new 2021 Postal rate changes that took effect January 24, 2021.

Added

• None

Changed

• None

Deprecated

• None

Removed

• None

Fixed

• None

Security

• None

Past Announcements

July 2024 Price Rates - July 14, 2024

The July 2024 rates are expected to take effect July 14, 2024. To learn more about the upcoming changes, please visit USPS. 2024 Postage Price Changes.

USPS PostalOne! Mail.dat Client Update - June 13, 2024

The USPS® is requiring a PostalOne!® Mail.Dat® Client Update - Effective: June 30, 2024, to support the July 2024 Price changes. For PostalOne! E-Doc submitters, the new Mail.dat client (60.0.0.0_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.

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.

USPS Discontinuance of Hardcopy Postage Statements - January 19, 2024

The USPS is discontinuing Hardcopy postage Statements to improve efficiency and expedite acceptance of mail - Effective on January 28, 2024. All domestic commercial mailings must use approved 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.

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.

January 2024 Price Rates - January 19, 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, 2023

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.

Mailers+4 Desktop Release Docs - August 31, 2023

Please see the new Mailers+4 Desktop Release Docs for additional documentation.

July 2023 Price Rates - July 09, 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.

USPS PostalOne! Mail.dat Client Update - July 09, 2023

The USPS® is requiring a PostalOne!® Mail.Dat® Client Update - Effective: July 09, 2023, to support the July 2023 Price changes. For PostalOne! E-Doc submitters, a new Mail.dat client (58.0.0.0_PROD) will be required for submissions that include a Mailing Date of July 09, 2023 or after. 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

New Setup.exe - Released - March 06, 2023

Mailers+4 Build 4241 - released on March 06, 2023 includes a NEW installation wizard that can install Mailers+4 Professional, Server and GeoCoder add-on updates all-in-one. This wizard will provide the option to install the GeoCoder add-on data files, which means there will no longer be a stand-alone download for the GeoCoder add-on beginning with the Mailers+4 update (mp4_202303) scheduled to be released on April 10, 2023. Please see the new instructions here Mailers+4: Installation.

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 takes effect on Sunday, January 08, 2023 to support the January 2023 Price changes that take effect January 22, 2023.

Historical Build Information - December 22, 2022

The Historical Build information from the Melissa Wiki can be found here: MAILERS+4 - Build History