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MAILERS+4® CASS & PAVE Certified Mailing Software

Reduce Undeliverable Mail and Lower Postage Costs

MAILERS+4 is an affordable, easy-to-use postal automation and bulk mail software program that verifies and standardizes addresses, dedupes your lists, and presorts your mailings for maximum discounts and direct-mail savings. MAILERS+4 will also append known suites or apartment numbers based on last name, and identify vacant properties (not occupied for at least 90 days and not receiving mail). Now, MAILERS+4 comes with Mail.dat® for free.


  • Reduce waste associated with undeliverable mail
  • Increase mail deliverability at the lowest postage rates
  • Manage an effective, productive database
  • Enhance your marketing and customer retention efforts
  • Eliminate costly duplicates
  • Increase response rates
  • Palletize large mailings to enhance workflow & maximize delivery speed


  • CASS (USPS certification for ZIP + 4 matching)
  • PAVE Gold Certified Postal Presorting
  • Full Service Intelligent Mail® compliant
  • Real-time USPS® NCOALink® & Canada Post NCOA Move-Update processing
  • AddressPlus add missing suite/apt. numbers
  • Mail.dat® included for free
  • Palletization options for First-Class and Standard Mail®

CASS Certified Engine

MAILERS+4’s CASS Certified engine scrubs your data by verifying and correcting delivery address elements against the DPV®, LACSLink®, and SuiteLink® files, and standardizes the address to USPS® specs. It then adds missing postal data including ZIP + 4® codes and carrier route numbers, delivery points, and more.

PAVE Gold Certified Postal Presorting

MAILERS+4 presorts your mailings for both automation and nonautomation rate discounts for First-Class, Standard, nonprofit, and Periodicals mail, including destination discounts.

Postal Presorting

NCOALink® Processing

We are an NCOALink Full Service provider with real-time* access to a database of 160 million change-of-address records dating back 48 months. It’s the only process that meets the Move Update requirement for First-Class and Standard Mail by updating addresses before mail is printed and sent.

Duplicate Elimination

MAILERS+4 can save you money on printing and postage by eliminating costly duplicate records in a single mailing list or across multiple lists.

Intelligent Mail® for MAILERS+4

MAILERS+4 incorporates Intelligent Mail barcode technology and qualifies letter- and flat-sized mail pieces for automation rates.

The Complete Marketing Toolkit

MAILERS+4 provides all the direct marketing tools you need to build your next campaign – in one box. With MAILERS+4, you get one-click access to:

  • Email and phone append services to fill in the gaps in your data
  • Targeted mailing lists you can order and download in minutes

Add-On Components

Add-ons for MAILERS+4 include support for:

MAILERS+4 is available as a monthly recurring subscription for $80/month for the Standard version and $160/month for the Professional version.

For your convenience, Melissa Data accepts MasterCard and Visa payments online. We also offer Automated Recurring Billing (ARB) which automatically charges your credit card each month to ensure uninterrupted service. You can cancel at anytime.

If you would prefer to prepay and save, call 1-800-800-MAIL to speak with customer service about an annual subscription.

Microsoft® Windows XP® or newer; Minimum 3.5 GB of free hard disk space; DVD-ROM.

MAILERS+4® CASS Certified Mailing Software Free Trial

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Melissa Data
The leading international provider of data quality and address verification software. Melissa Data's affordable, easy-to-use solutions for data cleaning and deduplication can be used separately or together to provide full global data quality. Melissa Data specializes in Microsoft .NET and SQL Server Integration Services, IBM, Java and Oracle environments with APIs, Web services and enterprise plugins that empower batch and real-time applications. Melissa Data's flagship Contact Zone enables data stewards to quickly create complex data quality and data integration routines with visual programming. Melissa Data also provides a full line of direct marketing solutions including mailing software, list hygiene and data append services, and a comprehensive line of mailing lists and sales leads.