SysTools Outlook to MBOX Converter

Convert Outlook PST to Thunderbird, Eudora or Entourage MBOX File Format

  • Converts MS Outlook PST to MBOX File Format
  • Create single MBOX file for one MS Outlook PST file
  • MS Outlook installation required for PST to MBOX conversion
  • No File Size Limitation: Convert PST File of Any size
  • Supports Both Outlook PST file types: ANSI or UNICODE
  • Export output MBOX File to Thunderbird, Entourage, Apple Mail, Eudora, etc.

List of Key Features in SysTools Outlook to MBOX Converter

convert outlook to mbox

Convert Outlook PST to MBOX

This software allows you to convert all emails from an Outlook PST to MBOX file format. Only one PST file can be converted at a time and a single MBOX is created for the same. The tool will export the entire folder having emails in them like: Inbox, Outbox, Sent Items, Drafts, etc.


maintain folder hierarchy

Maintain Folder Hierarchy

The Outlook to Thunderbird MBOX Converter provides the option to keep the folder hierarchy intact. If you like to keep the hierarchy maintained, then select "Yes" option else, if you do not want to maintain the folder structure then "No" option can be chosen.


show item count details

Show Item Count Details

As you load the Outlook PST file and click export; PST to MBOX Converter will show you the complete data count for each folder. It will show the name of current folder; which is being converted, its folder count and number of emails converted from it.


maintains data integrity

Maintains Data Integrity

While you convert Outlook PST to MBOX format, the software maintains complete data integrity meanwhile. The Meta data associated with emails like: sent data, received date, to, Cc, Bcc etc.; is also retained. Also, it will maintain the original formatting of emails and the crucial data in it.


single panel interface

Single Panel Interface

Convenience of the working with the tool is extended by providing a single panel for file selection, conversion, and status of conversion. Convert PST to MBOX on a single panel tool makes the procedure faster, understandable, and comfortable for all types of users.


exportable output mbox

Exportable Output MBOX

PST to MBOX Converter program creates a new MBOX format file post conversion. This MBOX file is easily exportable into all supportive desktop email clients. No kind of compatibility issues will be faced while exporting output MBOX file into clients like: Thunderbird, Apple Mail, Eudora, etc.


Outlook PST File to MBOX Converter Tool Screenshots

outlook to mbox conversion tool
Step 1: Outlook to MBOX Converter
add  & convert pst file
Step 2: Select MS Outlook PST File
maintain folder hierarchy
Step 3: Choose the option to maintain hierarchy
export & save outlook as mbox
Step 4: Export Outlook to MBOX

Watch Live Video of Outlook to MBOX File Conversion

Download Outlook to MBOX Converter Software
outlook to Mbox Box

Size: 2.9 MB Version: 1.0

Trial Limitations

Demo version of Outlook to MBOX software allows converting and saving first 15 emails from PST to MBOX file format.

Download Outlook to MBOX

Installation Uninstallation EULA

System Specifications

System Specifications
  • Hard Disk Space: 5 MB of free hard disk space

Application Pre-Requisites

  • Microsoft Outlook (32 bit) should be installed and configured for a valid or dummy POP3 profile (Not Configured for Exchange).
  • If you are using Window 8.1/8/7 or Vista, then please launch the tool as "Run as Administrator".

Supported Editions

  • Microsoft Windows – 2000, 2003, 2008, XP, Vista, or Windows 7/8/8.1, 2008/2012 (32-bit & 64-bit)
  • MS Outlook – Outlook 2000, 2003, 2007, 2010, 2013 (32 bit only)
Frequently Asked Question
Does PST to MBOX Converter software require Outlook installation for working?

Yes, Outlook environment is necessary for using the tool to convert PST to MBOX. Outlook (32-bit) should be installed and configured properly on the conversion machine.

Is the tool capable enough to convert multiple files simultaneously?

No, SysTools PST to MBOX Converter Tool will only let you convert single PST file at a time. It does not support file conversion in bulk.

What is the PST file size limit enforced for Outlook to Thunderbird Converter?

No, the software can convert any size of PST file successfully. It doesn't show any kind of performance limitation.

Is it possible to convert Calendar Items also along with emails?

No, PST to MBOX Converter is only meant for the conversion of Outlook emails to MBOX format.

Can I convert a corrupt or password protected PST file to MBOX?

No, software will not convert corrupt or password protected PST file. If you have a corrupted PST file then first recover it using SysTools Outlook Recovery tool and then perform its conversion into MBOX format using this tool.

Do I need to have any MBOX supportive email client on my machine?

No, there is no need to have any MBOX supportive email clients such as Thunderbird, Eudora, Entourage or Poco Mail on the conversion machine. Software will perform conversion seamlessly.

How can I access the output file into Thunderbird profile?

Follow the below given are the steps:

Copy the converted MBOX file into following location according to your version of Windows:

Windows XP:

Win XP location

Windows Vista/Windows 7/Windows 8/ Windows 10:

Win vista/7/8/10 location

Note: You can try an automated solution to import MBOX to Thunderbird in just few clicks.

What Clients Say

It was always a difficult task working with software applications but I am highly impressed with the work of Outlook to Thunderbird Converter developers. They not only did offer a very precise conversion but also made it absolutely level headed for all types of users.

— Eric Leary, Thailand

There has been a great change in the way I communicate through email these days. Earlier, I was only restricted to Microsoft Outlook, using PST to MBOX Converter made it possible for me to use my mailbox on a variety of email clients without compatibility issues.

— Claudia Berlitz, Germany
SysTools Outlook to MBOX Converter Order Now

Get an Overview of Outlook to MBOX Converter Features - FREE and Licensed Version


Features FREE Version FULL Version
Add Outlook PST File
Maintain Folder Hierarchy
Show Item Count Details
Supports Both Outlook PST file types: ANSI or UNICODE
Windows 8 & All Other Previous Windows Version Supported
Export Outlook PST to MBOX Export 15 Emails All Items
Cost FREE $49