USPS FlexStream USPS™ Mail Processing

A Complete Solution for USPS™ Mail Processing

Flex Systems’ USPS mail processing module allows for comprehensive address quality and mail processing features. The module gives you access to services such as CASS™, NCOA, DSF2®, Presort, and more, enabling you to generate the highest possible discounts through the USPS.

  • CASS Certified™ for address correction

    Standardize abbreviations and address formats to USPS guidelines, correct the spelling of streets and cities and verify deliverability, includes DPV™, LACSLink® and SuiteLink™ processing. Add missing postal data including nine-digit ZIP codes™, eLOT® and carrier route numbers, delivery points and more.

  • Move Update service

    Process lists against the limited 18-month or full 48-month NCOALink® data set. NCOALink processing meets USPS Move Update requirements for First-Class Mail® and Standard Mail® discounts.

  • Address enhancement

    Optional address enhancement services include DFS (Delivery Point Sequencing), Apartment append, Phone append, and Geocoding.

  • PAVE™ certified postal presorting

    Sort address lists for the lowest possible postal rates and generate all required USPS documentation, reports and postage statements. The service includes support for First-Class Mail® and Standard Mail®

FlexStream allows you to capture the address data to be run through the USPS module from the documents and to replace and add the data returned by the process to your documents. FlexStream’s additional features to generate and print Intelligent Mail® (IMb), Intelligent Mail® Package (IMpb), and Code128 barcodes make FlexStream a complete solution for USPS mail processing.

A Blended Mailing Solution: Part application, part SaaS

Flex Systems’ USPS mail processing module uses a cloud based API for its address hygiene and presort solutions. The back-end CASS and presort engines are the most robust in the industry. The services are delivered on-demand, through the cloud. Processing takes place in real time, while you wait.

The services can be accessed through FlexStream without having to install additional software and data files on your computer. The interface to the service is completely integrated in FlexStream, creating a hybrid system that takes advantage of hosted functionality without sacrificing the usability of client side applications. Constantly changing postal requirements and software updates are no longer burdensome to the end users, reducing the cost of ownership.

  • No software to load.
  • No updates to install, always up-to-date.
  • No special hardware required.

Use and Pay only what you need

An annual subscription for the USPS processing service can be purchased for an additional fee. Optional address hygiene and database enhancement features are available on a pay-as-you go basis, allowing you to only use – and pay - for what you need.

  • Cost effective annual subscriptions.
  • 'Pay-as-you-go' additional address hygiene and data enhancement services.
  • No Add-on’s. Dedupe, Palletization, and Mail.dat included.

All USPS® Mail Processing Features Needed

The Address hygiene and Presort services combined with the powerful design, printing, and mail production features of FlexStream give you an unsurpassed solution for USPS mail preparation.

FlexStream Designer Functions

  • Capure the address from the linked PDF document.
  • Split the address block in address lines to prepare for postal processing.
  • Replace the original address with the corrected and standardized address block after running the USPS processing.
  • Add additional postal information like endorsement line.
  • Generate and print Intelligent Mail® (IMb), Intelligent Mail® Package (IMpb), and Code128 barcodes.


USPS Design

Address Hygiene Services



  • CASS Certified™ for accuracy by the USPS. Produces Form 3553.
  • Integrated DPV™ ensures that each address is a deliverable location.
  • NCOA 18 or 48 months processing.
  • Optional Delivery Sequence File (DSF2®) processing.
  • Apartment append, Phone append, Geocoding.
  • Instant, on-line, Process Acknowledgement Form (PAF) generation.
  • Extensive formatting options for returned data, like casing and replacing or removing address elements.

  • USPS PAVE™ (Gold) Certified presort processing.
  • Lowest available presorted postal rates for volume mailings.
  • Advanced business rules driven Drop Ship Entry Point Lists that can maximize your postal savings even further.
  • Palletization of sacks and trays.
  • Produces all required USPS mailing paperwork. All reports are generated in PDF format for easy access and printing. Viewing and printing are integrated in FlexStream.
  • Generates Mail.dat.
  • Customizable break marks for packages, containers, and pallets.




USPS Mail Processing is availabe as an add-on service. Fees are based on a annual subscription covering the required address hygiene and presort services. Subscriptions for low to high volumes are available, making the service attractive for both smaller and large users. The subscription volumes are based on a user's expected mail volume per job\order. Additional address hygiene and database enhancement features are available on a pay-as-you go basis.

When you are using both FlexStream and FlexMail, your subscription can be used in both programs. Please note that due of processing logic in FlexStream, dedupe can not be used in FlexStream.


Subscriptions allow users to unlimited usage of the processing services covered by the subscription for any mailing lists with a certain maximum number of addresses for the subscription period. Subscriptions can be purchased through our partners.

The following subscription packages are available:

Period Recs per job
CASS / Dedupe / Presort Yearly 5.000
CASS / NCOA 18 month / Dedupe / Presort Yearly 5.000
CASS / NCOA 18 month / Dedupe / Presort Yearly 50.000
CASS / NCOA 18 month / Dedupe / Presort Yearly 100.000
CASS / NCOA 18 month / Dedupe / Presort Yearly 1.000.000


Additional Address Hygiene and Data Enhancement

Additional address hygiene and data enhancement services are available as needed. Costs are per 1000 records with a certain minimum and are paid on-line by credit card.

Per 1.000 Minimum
Basic services
CASS Processing $ 0.40 $ 25.00
CASS + NCOA 18 month $ 0.50 $ 50.00
CASS + NCOA 48 month $ 0.60 $ 70.00
Dedupe $ 0.50 $ 50.00
Presort $ 0.50 $ 20.00
Additional services
DSF2 Processing $ 0.65 $ 95.00
DMA 'do not mail' suppression $ 0.50 $ 30.00
Prison suppression $ 0.50 $ 20.00
Deceased suppression $ 1.00 $ 50.00


Comparison chart


FlexStream with
USPS Mail module
Business edition

Mail Manager
Initial costs $ 3,290.00* $ 2.695.00 $ 2.495.00 $ 3,500.00
Processing options
NCOALink + $ 995.00 + $ 1,995.00 + $ 1,245.00
Dupicate Detection & removal + $ 2,000.00 + $ 1,500.00
Postal Presort PAVE
Full service USPS IM Barcode
Palletization for Sacks and Trays + $ 3,000.00 + $ 300.00 + $ 3,000.00
Dynamic Drop Shipping w. business rules to NDC, ADC, and SCF n/a n/a n/a
Mail.dat + $ 750.00 + $ 500.00 + $ 1,350.00
Web service
Electronic PAF generation n/a n/a n/a
Always compliant with USPS updates required updates required updates required
Includes FlexMail 4 Basic and subscription for CASS + NCOA 18 + Dedupe + Presort for files fizes up to 100.000 records.


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