Service Overview

USPS postage statements,
made easy.

mail.easy is an API library that simplifies submitting electronic postage statements to USPS for mid-sized mailers. Three API calls — preflight, confirm, and submit — and we handle the heavy lifting and complex logic.

Last updated: April 18, 2026
How it works

As easy as 3 API calls.

Preflight your mailpieces

Before mailing, send a simple JSON dataset of all your mailpieces to /maileasy/preflight. We do the heavy lifting:

  • Build trays and assign mailpieces
  • Generate IMb and Tracking ID barcodes
  • Sort pieces into rate categories — 5-Digit, AADC, Mixed AADC, Single Piece
  • Prepare pieces for postage statement submission

Mix multiple mail types and sorts within a single preflight dataset, and send as many preflight requests as you need throughout the day or mailing session.

Mail the pieces

Mail your pieces indexed by tray for simple sorting at induction. Everything is barcoded, organized, and ready to go.

Confirm & submit

Request mail.easy to combine all submitted preflight datasets and return confirmation of the postage statement package. Add or remove preflight datasets as needed before final submission.

When you’re ready, request mail.easy to submit the postage statement package. Done.

What you can preflight

Mailing types & sort levels.

Automation

Standard mail

  • Letter 5-Digit, AADC, Mixed AADC, Single Piece
  • Postcard 5-Digit, AADC, Mixed AADC, Single Piece
  • Flat 5-Digit, AADC, Mixed AADC, Single Piece
Certified

Certified mail

  • Letter 5-Digit, AADC, Mixed AADC, Single Piece
  • Flat 5-Digit, AADC, Mixed AADC, Single Piece
Electronic Return Receipt option available
Priority Mail

Flat Rate — Single Piece

  • Envelope Priority Mail Flat Rate Envelope
  • Medium Box Priority Mail Flat Rate Box
  • Large Box Priority Mail Flat Rate Box
Certified & Electronic Return Receipt options available
Built in

Everything you need, handled for you.

● Mail.dat processingPostage statements processed for you
● SSF tracking submissionSSF file type 2, on your behalf
● Mail ProfilesStore CRID, MID, and permit info
● Utility APIsZIP11 lookup — with more on the way
What’s next

Roadmap.

Phase 1 · Now

Core API library

Preflight, confirm, and submit electronic postage statements through Mail.dat.

Phase 2

Tracking collection

Consolidated tracking for your mailpieces — PDX, IV, and return mail in one place.

Phase 3

Mail facility UI

Front-end software for managing operations at your mail facility.

Easy. Hassle-free. Done for you.

Leave us to deal with postal employees, postal contractors, and the worst, clumsiest set of services known to mankind — so you don’t have to.

Want to talk?

Tell us a little about your mailing operation and we’ll be in touch.