Convert Outlook OST file to Mozilla Thunderbird MBOX format by simple guidelines

Summary: This tutorial describes easy guidelines to convert Outlook OST file to Mozilla Thunderbird MBOX file format. Let us know the solution for the conversion but before this, let us have a quick look at the reasons for this OST file to Thunderbird MBOX conversion.

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OST files are supported by Microsoft Outlook and help users to work offline. All the changes made in offline mode are updated once Outlook is connected with Exchange Server. But there are several drawbacks of OST file like prone to corruption, can’t move from one computer to another, etc. Due to which, users are moving towards MBOX file format.

Reasons for converting OST file to Thunderbird MBOX

MBOX format is a widely used file format supported by more than 25+ email clients like Mozilla Thunderbird, Apple Mail, The Bat, Eudora, Entourage, Opera Mail, Spicebird, SeaMonkey, and others. So, when OST file is converted into MBOX format, it can be easily opened in all these email clients.

Users convert OST file to MBOX file format because of other reasons as well like crashing of Outlook and Microsoft Exchange Server, corruption in OST file, unexpected shutdown due to maintenance of Exchange Server, etc.

Now, let us jump to the solutions to convert OST to Thunderbird MBOX file format in the coming section of this post.

How to manually convert OST file to Mozilla Thunderbird MBOX?

No direct manual solution exists to convert OST to Thunderbird MBOX file format. If you want to follow manual solution, first convert OST file to PST file format and then convert into MBOX file format. Here are the steps –

Steps to manually convert OST to PST:

• Open Outlook email client.
• Go to File tab, select Open & Export and then go to Import & Export option.
• Select Export to a file under Import & Export Wizard. Click Next.
• Click on Outlook data file (.pst) option and click next.
• Select the folder of your choice to export and click next.
• To save PST file, select file name and path.

You can also choose archiving method to migrate OST to PST. This method export Outlook OST emails into a separate PST file. Given are the steps –

• Start Outlook application
• Go to File tab and then select options
• Go to advanced tab and click on Auto archive settings
• Select the number of days for auto-archiving to save the archived file. Also, provide archiving options.
• Click OK

With these two methods, one can get data in PST file.

Steps to convert PST to Thunderbird MBOX –

• Download Mozilla Thunderbird
• Install and Launch it.
• Go to File menu and select Import.
• Import PST files that you want to convert into MBOX
• The added PST file is successfully converted into MBOX file format.

Alternate solution to convert OST to Thunderbird MBOX

If you don’t want to go for lengthy solutions and want a simple solution then we suggest you to go for MailsClick Convert OST to MBOX Software. This software will help you to overcome all limitations of manual method and is simple to operate without any technical guidance.

In a few minutes, OST file is directly converted into MBOX format without using Outlook or any other supported email client.

Features offered by OST to Thunderbird MBOX Converter

• The program is designed with advanced features that allows direct conversion of OST emails into MBOX with attachments.
• In a few clicks, OST file of any size is smartly exported into MBOX file format.
• The software is capable to perform the conversion without Outlook and MS Exchange Server connectivity.
• The utility supports all types of OST files like orphaned, corrupted, inaccessible and password-protected.
• You can get instant scan and preview of OST file items.
• The software provides facility to convert selective items from OST file.
• You can self-analyze the software by conversion of first 10 items per folder.

How to convert OST file to Mozilla Thunderbird MBOX format using the software?

Given are the steps to convert OST file to Thunderbird MBOX file format –

• Install and launch OST to Thunderbird MBOX Converter Tool.
• Use the Browse button and add OST file.
• Check preview of OST file items and select items to export.
• Choose MBOX format and destination path to save MBOX file.
• Hit the Convert Now button and this will convert OST file items into MBOX file format.

Wrapping Up

All possible solutions to convert Outlook OST file to Mozilla Thunderbird MBOX format are provided in this write-up. If you consider manual solution fit for you, go with it. However, it is lengthy and confusing to use. For simple solution, you can use automated software and export OST file items to Thunderbird MBOX format in a few clicks.