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MailOne Software

MailOne CentorMail Support

MailOne CentorMail Installation

To fully install MailOne CentorMail on your computer, download and install each of the files below one-at-a-time in the order presented.

STEP 1: Microsoft .NET v3.5 (EXE, 3MB) — or later .NET versions. Check installed programs to see if .NET is installed on your PC.

STEP 2:  MailOne CentorMail

STEP 3: MailOne CentorMail USB Driver Installer (EXE, 2MB)

MailOne CentorMail Installation Guide

MailOne CentorMail Customer Installation Guide (PDF)

Installation Warning

What if you see the warning below?


Even though Microsoft has not certified the MailOne software, be assured that it is safe to install and use.

  1. Click the Actions button, which will launch a new window.
  2. In the new window, click More Options.
  3. Then click Run Anyway.

How to Update MailOne CentorMail

Uninstall the old version from your computer. (Don’t worry — all your data should be retained even though you’re uninstalling.)
Download the new installer. (See STEP 2 above under MailOne CentorMail Installation.)
Install the new version.

*How to Uninstall MailOne

Click the Windows Start button (bottom-left of your computer screen).
Click Control Panel > then Programs > then Programs and Features.
Click FP-MailOne in the list of programs.
Click the Uninstall/Change button that appears above the programs list.
Follow the instructions to uninstall.

January 26th Rate Change Information

The USPS® Rate Change for January 26th, 2020, has been approved. More information coming soon.

MailOne CentorMail

+ Install

MailOne CentorMail Installation

To fully install MailOne CentorMail on your computer, download and install each of the files below one-at-a-time in the order presented.

STEP 1: Microsoft .NET v3.5 (EXE, 3MB) — or later .NET versions. Check installed programs to see if .NET is installed on your PC.

STEP 2:  MailOne CentorMail

STEP 3: MailOne CentorMail USB Driver Installer (EXE, 2MB)

MailOne CentorMail Installation Guide

MailOne CentorMail Customer Installation Guide (PDF)

Installation Warning

What if you see the warning below?


Even though Microsoft has not certified the MailOne software, be assured that it is safe to install and use.

  1. Click the Actions button, which will launch a new window.
  2. In the new window, click More Options.
  3. Then click Run Anyway.
+ Update

How to Update MailOne CentorMail

Uninstall the old version from your computer. (Don’t worry — all your data should be retained even though you’re uninstalling.)
Download the new installer. (See STEP 2 above under MailOne CentorMail Installation.)
Install the new version.

*How to Uninstall MailOne

Click the Windows Start button (bottom-left of your computer screen).
Click Control Panel > then Programs > then Programs and Features.
Click FP-MailOne in the list of programs.
Click the Uninstall/Change button that appears above the programs list.
Follow the instructions to uninstall.

+ Rate Change

January 26th Rate Change Information

The USPS® Rate Change for January 26th, 2020, has been approved. More information coming soon.

MailOne CentorMail

+ Release Notes