Are you trying to transfer Outlook emails to Thunderbird email client via OST files? If unable to get the expected result due to lack of knowledge of how to import OST to Thunderbird. If yes, then read this article. Here we will explain how to import Outlook emails from OST to Thunderbird. Let’s begin.
MS Outlook is the leading desktop email application for managing email profiles. Users add their different email accounts to Outlook and use it for emailing. After configuration of an email account, Outlook automatically creates a data file to hold all the data of that email profile.
Mostly Outlook creates OST file (Offline Storage Table) which has a direct connection to the mail server. This single OST file supports to include all email profile data including mail folders, contacts, calendar and other elements.
This file can also be worked on in offline mode with Outlook so that its internal data can be accessed. Also, if the OST file is in working state, it is also possible to export data items from it to various formats like- PST, vCard, MSG, etc.
Also Read: – How to Convert OST to Zimbra TGZ file with Outlook Emails?
Mozilla Thunderbird – Overview
Just like MS Outlook, Mozilla Thunderbird is also a famous desktop-based email client. It is an open-source email client and any user can download and use this application for free.
Most of the functions of Outlook are also available inside Thunderbird, so many users consider it the best alternative to Outlook.
It has the power to manage the user’s email profile and also supports sharing emails, storing contacts, scheduling calendars, creating notes, etc.
Why Import Outlook emails from OST to Thunderbird?
Importing Outlook emails from an OST (Offline Storage Table) file to Thunderbird is necessary for several reasons, such as:
- Switching from Outlook to Thunderbird: – If you are switching from Microsoft Outlook to Thunderbird but don’t want to lose any of your important emails, importing your OST files to Thunderbird will definitely be helpful.
- Easy Offline Access to Emails: – In many cases the OST file stops working in Outlook due to several reasons. OST files that are corrupted or disconnected from the Outlook profile are inaccessible. But by trying any method of transferring emails from Outlook OST to different platforms it becomes possible for users to access their emails offline easily.
- Additional backup of important emails: – For data security, importing email data from OST files into Thunderbird can act as a secondary backup. It helps keep your important emails safe on another platform. This reduces the risk of losing important data if something happens to your Outlook setup or OST file.
Best Way for Importing Outlook OST Emails to Thunderbird
Regzian OST Converter software is a straightforward way to transfer emails from Outlook OST files to Thunderbird email client. Using this smartest tool you can migrate Outlook data from OST files to different email platforms.
This software directly imports OST emails to Thunderbird profile and also allows to manually convert OST emails to Thunderbird compatible files like- MBOX, and EML. It automatically detects the default Thunderbird local storage where it stores email profile data. It addition, it offers features like- selecting mail folders exporting, email filtering, and much more.
How to use Regzion OST to Thunderbird Importer Software?
- Run this OST Converter software on your computer with Windows O/S.

- Click on Select OST button and choose single or bulk conversion mode.

- Add OST file for email migration process and press Start Scanning button.

- Scan OST file and load all its inner Outlook mailbox folders and items.
- Get a preview of each Outlook email and make selection of mail folders for export process.

- Press the Save OST button and choose the Export to Thunderbird conversion option.

- Software will auto-detect the Thunderbird storage location from your computer.
- Select Email filter and specify a date range (for exporting emails of chosen dates only).

- Click on Convert and start the process to import mail folders from OST files to Thunderbird.

Conclusion
Importing Outlook emails from OST to Thunderbird becomes a must for users due to many reasons. The reasons can be switching from Outlook to Thunderbird email client, backing up important emails, and more. The best solution that can make it easy is Regzian OST Converter.
This software simplifies the OST to Thunderbird import process with its advanced functionality. It ensures the smartest migration with features like automatic detection of Thunderbird storage location, email filtering, and more. Try it now.
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