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Vendors offer a variety of software products for preparing and presenting Full-Service mailings. For a list of vendors who have tested their Full-Service solutions with USPS, see this Certified FS Vendor Summary List or this more Certified FS Vendor Detailed List.

Mailers using a product on these lists can start mailing without further testing in the Test Environment for Mailers (TEM).

Using Software that Presorts, Generates and Submits Mailing Information – Mail.dat® or Mail.XML™
Solutions for mailers who wish to use software to prepare presort mailings, generate unique barcodes, and submit mailing information electronically to USPS, are listed in this summary list of vendor capabilities under Mail.dat or Mail.XML submissions. For additional information on submitting Mail.dat or Mail.XML electronic documentation, refer to:

Using Software that only Presorts and Generates Barcodes – Postal Wizard

Software solutions to presort mail and generate unique barcodes, but that require the mailer to enter the postage statement information online via the online Postal Wizard tool are listed in the summary list of vendor capabilities under Postal Wizard.

For additional information on submitting Postal Wizard electronic documentation, refer to the document "How to Submit Postage Statements via Postal Wizard"--Available soon.

Testing Process for Mailers Using Vendor Software Solutions
Although not required, mailers using software pre-approved by USPS may choose to test their ability to submit electronic mailing information by using the Test Environment for Mailers (TEM). Instructions are in the TEM Process for Mailings Using Mail.dat or Mail.XML (PDF).

Mailers Using Software Not Tested with USPS
Mailers that prepare mailings using presort software that has not been tested with the USPS should follow the instructions in the following documents:

  • TEM Process for Mailings using Software Not Tested (PDF)
  • How to Submit Mail.dat Files to TEM (PDF)
  • How to Submit Mail.XML Files to TEM (PDF)
  • How to Submit Mail.dat Files to PostalOne! (PDF)
  • How to Submit Mail.XML Files to PostalOne! (PDF)

Contact Information:

  • Email the PostalOne! Help Desk at Postalone@usps.gov
  • Phone: 800-522-9085
  • Page updated: 04/15/2014
Important Updates

The "Heartbleed" bug hasn't affected Postal Service websites that require customers to provide usernames and passwords, according to USPS IT and the Corporate Information Security Office (CISO). To learn more information, click here.


Standard Mail DSCF Load Leveling Final Rule Published in the Federal Register

The Postal Service has released its Federal Register final rule revising the service standards for Standard Mail that is eligible for Destination Sectional Center Facility (DSCF) rates. These changes will allow a more balanced distribution of DSCF Standard Mail across delivery days. With its new rules, USPS is extending delivery expectation to four days for mail entered on Friday and Saturday. National Implementation began April 10, 2014.


January 2014 Price Change Fact Sheets


Getting Started with Full-Service Intelligent Mail


PostalOne! Contingency Plan

For mailers unable to submit electronic information, click here for the PostalOne! Contingency Plan.











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