Can’t Open EML Files in New Outlook? Causes and Solutions

Sarabjeet Kaur | eml Software Technology | 5 minutes read | Modified on: 23-07-2026
can't open eml files in new outlook

If you can’t open EML files in New Outlook, you’re not alone. Many users have noticed that after switching from Classic Outlook to the new version, opening .eml email files is no longer as simple as before. Instead of opening the email, New Outlook may do nothing, show an error, or ask you to choose another app.

The good news is that this problem is usually caused by compatibility changes, incorrect file associations, or limitations in the New Outlook app. In this article, we’ll explain the most common reasons why EML files are not opening in New Outlook and show you the best ways to fix the issue.

Why Can’t Open EML Files in New Outlook?

Unlike Classic Outlook, New Outlook is built on a different architecture and currently doesn’t support some features that desktop Outlook offered. Because of this, many users experience problems while trying to open EML files in New Outlook.

Some common reasons include:

  • New Outlook has limited support for local EML files.
  • Incorrect Windows default app settings.
  • Corrupted or damaged EML files.
  • EML files created by unsupported email clients.
  • Outdated Outlook or Windows version.

Let’s look at each solution one by one.

Solution 1: Check Whether You’re Using New Outlook

Before trying any advanced fixes, confirm that you’re actually using New Outlook.

Many users unknowingly switch from Classic Outlook to New Outlook using the toggle button. Since New Outlook doesn’t support several legacy features, opening EML files can become difficult.

If you frequently work with EML files, switching back to Classic Outlook (if available) may solve the problem.

Solution 2: Set the Correct Default App for EML Files

Sometimes the issue isn’t Outlook, it’s Windows.

If another application is assigned as the default program for .eml files, New Outlook won’t know how to handle them.

  • Right-click any EML file.
  • Click Open With.
  • Select Choose Another App.
  • Choose the appropriate email application.
  • Enable Always use this app.

Now try opening the EML file again.

Solution 3: Verify That the EML File Isn’t Corrupted

If the EML file is damaged or incomplete, it may fail to open in any email client, not just Outlook.

You can test the file by opening it in another email application. If it still doesn’t open, the file itself may be corrupted.

Common reasons include:                                    

  • Incomplete download
  • Interrupted email export
  • File corruption during transfer
  • Storage device errors

Solution 4: Update Microsoft Outlook and Windows

Running an outdated version of Windows or Outlook can sometimes cause compatibility issues.

  • Windows Updates
  • Microsoft Outlook updates
  • Microsoft Store updates (for New Outlook)

After updating, restart your computer and test the EML file again.

Solution 5: Try Another Compatible Email Client

If New Outlook still refuses to open the file, you can temporarily open the EML file using another compatible email application to verify whether the problem is with the file or Outlook itself.

However, this is only practical when you have a few EML files. If you need to access hundreds or thousands of emails or migrate them to Outlook, manual methods can quickly become time-consuming.

Before converting or migrating a large number of EML emails, it’s important to remove duplicate emails to avoid unnecessary data repetition and storage issues. CubexSoft EML Duplicate Remover helps users find and remove duplicate EML files while keeping the original email data secure. It can be valuable for users who manage multiple copies of EML files before migration.

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CubexSoft EML Converter

Need a Faster Way to Open EML Files in New Outlook?

If none of the above solutions work, or you need to manage multiple EML files, using a professional EML File Converter can save significant time and effort.

CubexSoft EML Converter is designed to help users convert EML files into Outlook-compatible formats without affecting email properties, attachments, or folder hierarchy.

With the software, you can:

  • Open multiple EML files at once.
  • Convert EML to PST for Outlook.
  • Preserve attachments and email formatting.
  • Maintain folder structure and metadata.
  • Export EML files to multiple formats and email platforms.

Why Choose CubexSoft EML Conversion Tool?

If you’re dealing with a large number of EML emails, repeatedly trying manual methods isn’t always practical. An expert solution can help you access, convert, and migrate emails without spending hours on individual files.

The EML Conversion Tool is built for users who want a simple and reliable way to convert EML files into Outlook-supported formats while preserving the original email content.

Key Benefits of EML File Converter

  • Convert EML file to PST without Outlook.
  • Export EML files to PDF, MSG, MHT, MBOX, HTML, ICS, DOC, Office 365, Gmail, Exchange Server, IMAP Server, Thunderbird, and many other formats.
  • Convert single or multiple EML files in one go.
  • Preserve email formatting, attachments, metadata, and folder hierarchy.
  • Preview emails before conversion.
  • Supports all major Windows & macOS versions.
  • No technical expertise required.

How to Convert EML Files for New Outlook?

Step 1: Download and install the Software on your Windows computer.

Step 2: Click Add Files or Add Folder to import your EML files.

Step 3: Choose PST as the output format (recommended for Outlook), select the destination, and click Convert.

Once the conversion is complete, import the PST file into Microsoft Outlook and access all your emails without compatibility issues.

Tip: If your goal is to use emails in New Outlook, converting EML files to PST is one of the most reliable approaches because New Outlook has limited support for directly opening standalone EML files.

Frequently Asked Questions

Can New Outlook Open EML Files Directly?

Not always. New Outlook currently has limited support for local EML files, so some users may experience compatibility issues.

Why Are My EML Files Not Opening?

Common reasons include:

  • Unsupported New Outlook features
  • Corrupted EML files
  • Incorrect default app settings
  • Outdated Outlook or Windows version

What Is the Best Way to Open Multiple EML Files in Outlook?

If you have only a few files, manual methods may work. However, for bulk email migration, using an EML Email Converter is generally more efficient and helps preserve email properties.

Can I Convert EML Files Without Losing Attachments?

Yes, the professional utility is designed to preserve attachments, email formatting, metadata, and folder hierarchy during conversion.

Conclusion

If you can’t open EML files in New Outlook, the issue is often related to compatibility limitations, incorrect settings, or damaged files. While basic troubleshooting may resolve the problem for some users, it isn’t always practical when you need to manage a large number of EML files.

In such cases, EML Export offers a straightforward way to convert EML files into Outlook-compatible PST format while maintaining email integrity. You can also use the free trial version to evaluate the software before making a purchase.