DBXファイルをPSTに完璧に変換する方法

武志雄人
Published: May 16th, 2026 • 6 Min Read

If you’ve ever used the Outlook Express email client, you’re probably familiar with DBX files. These files tend to store email messages. However, since this email client is now outdated, accessing those old emails has become difficult. This is why it’s important to learn how to convert DBX files to PST. This blog will explain why such a conversion is useful, its manual steps and limitations, and how professional converters make the process perfect.

Why would you need to convert a DBX file to a PST file ?

Imagine you’ve found an old hard drive containing years’ worth of important business emails stored in Outlook Express DBX format. But now you’re using MS Outlook. Double-clicking the files won’t open anything. This is where you might need to convert your Outlook Express DBX files to PST format. Outlook Express uses DBX, while MS Outlook uses PST. This conversion will allow you to open, access, read, and manage your old emails again without compatibility issues.

Let’s discuss a recent case. Mr. Daichi, a small business owner, recently upgraded his system but lost access to his old emails, which were saved in DBX file format. He needed these emails for legal purposes but didn’t know how to forward them to Outlook. What was his only solution? To convert DBX files to PST!

Question: How do I open a DBX file in Outlook 2019?

Answer: You cannot open these directly. First, you need to convert DBX to PST. You can do this manually or use a professional converter.

Question: Is it possible to import DBX files into MS Outlook without data loss?

Answer: Yes, you can do this by using a professional DBX to PST converter.

I understand the meaning of converting DBX files to PST files.

Converting a DBX file to PST format migrates email data from Outlook Express (DBX file format) to MS Outlook (PST file format). This type of conversion helps you access older emails in newer versions of Outlook.

Did you know this?

According to Statista (2024), more than 400 million users worldwide use MS Outlook as their primary email platform. Although Outlook Express has been discontinued since 2014, many users still have old DBX files that require conversion to access.

In what situations are DBX files most often converted to PST files ?

Below are some common situations where this conversion might be necessary.

When switching email clients from Outlook Express to MS Outlook.
When switching from an old machine to a new system.
While restoring old archived emails from a DBX backup.
To ensure business continuity by accessing past legacy email data.
When integrating multiple email accounts into a single Outlook profile.

Manual steps to convert Outlook Express DBX files to PST files.

You can use the following two manual procedures:

Number one. Using Outlook Express and MS Outlook together.

First, open Outlook Express.
Next, export your mailbox to MS Outlook.
You can import this exported data using the “Import and Export” option in MS Outlook.

merit:

This procedure is free.
No external software is required to do this.

Disadvantages:

This process requires that both MS Outlook and Outlook Express be installed on the system performing the conversion.
This is a very time-consuming process.
If the file is large or corrupted, this method is prone to data loss.

Option 2 : Use Windows Live Mail as an intermediary.

First, try importing the DBX file into Windows Live Mail.
Next, you can export your messages from Windows Live Mail to MS Outlook (in PST format).

merit:

This procedure is a little simpler than the first one.
This process also allows for selective export.

Disadvantages:

Windows Live Mail is no longer supported.
The procedure may appear complicated to non-technical users.
This process does not guarantee the accurate conversion of email attachments and folder hierarchies.

Disadvantages of manual procedures

All of these methods require old, obsolete applications.
Neither process offers support for batch conversion.
There is a very high risk of the file becoming corrupted.
The amount of manual labor involved is extremely heavy.
To accomplish these tasks, solid technical knowledge is essential.
Email attachments and formatting may be lost.

A better approach is to use professional-level tools.

Even when manual procedures typically fail or don’t work, BitRecover DBX Converter Wizard is your reliable solution. This is a professional converter designed to handle this conversion effectively.

Download Now Side Now

Convert dbx files to pst files

Key points of interest:

This software helps convert Outlook Express DBX files to PST format and other formats.
No data loss occurs during the process.
ProConverter supports batch conversion.
The software preserves the folder structure, original email formatting, and metadata.
This amazing tool works perfectly on all Microsoft Windows OS versions.
Even large DBX files can be converted without errors.
You can preview the data before conversion.
This software also offers selective conversion options for specific folders.
This Wonder Tool is compatible with MS Outlook 2019, 2016, 2013, and even other older versions.

See the simple step-by-step instructions .

First, please download and install the tool.
Next, add the DBX file/folder using the “Select File” / “Select Folder” option.
You can preview your emails before exporting them.
Next, select the PST file format as the output save option.
Then, click “Convert” to start the conversion.

Frequently asked questions

Q. How to perfectly convert DBX files to PST files without Outlook Express?
A. To directly convert DBX files to PST format readable by MS Outlook without using Outlook Express, use a professional DBX to PST migration tool.
Q. Can you tell me a free procedure to convert Outlook Express DBX files to PST files?
A. Yes! However, such a manual procedure requires both old programs like Outlook Express and Windows Live Mail, which are now outdated and very unreliable! So it’s always better to choose a professional converter.
Q. What is the most perfect way to convert DBX to PST in Outlook 2021?
A. To convert DBX to PST (Outlook 2021), it is best to use a professional-level tool.

What did we discuss here?

While struggling to open old Outlook Express emails stored in DBX files, I discovered that the most reliable way to convert DBX files to PST is to use a professional converter, rather than resorting to risky and slow manual methods. So why wait? Let’s access your old email data right now!