How to Fix Large EML Files Not Importing into Outlook?
09 Feb, 2026
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Learn how to resolve the issue of large EML files not importing into the Outlook application
Many people utilize EML files these days. They come from several email services. Most of the time, people can't open these EML files in MS Outlook since they are too big. This blog post will explain the problems and give you solution if you want to know why Outlook won't import large EML files. Let's get started!
Can EML Files Import into Outlook?
Yes, you can't open EML files directly in the Outlook. PST and MSG file are the only ones that Outlook can open. You can drag and drop EML files, but only a few at a time because Outlook can understand the message format.
Outlook isn't designed to handle large EML files directly, which causes several problems for users.
How to Fix Large EML Files Not Importing into Outlook ? Quick Answer
You can either drag and drop your EML files into Outlook by manually and use the EML converter application. It takes a long time and is dangerous to do it with manual method. The automated method on the other hand, is both safe and useful. In this article, let’s read more about each way.
Ways to Manually Convert Large EML Files
If you have Outlook account and need to transfer a few EML files you can only use drag & drop.
1. On one side, open the Local Folder and on the other, the Outlook program.
2. After that, drag and drop the EML files into the desired location. This will allows you to open the EML files.
You can only see your EML files in Outlook this way. You will need to save them as a PST file if you want to import them.
There Are Several Complications With Manual Method
• It doesn't work well with massive EML files since it might not be able to load large files with attachments.
• EML files could crash, which could cause Outlook to not be able to import large EML files.
• It's very likely that crucial information including files, headers, metadata, and more may be lost.
• You can't just import multiple EML files into Outlook. It could also change the layout and data of your original file.
• It's easy to mess up the layout and it's not a good solution for confidential EML files.
How to Upload EML Emails to Outlook: Best method
Using the Softaken EML to PST Converter is the best approach to fix the problem of large EML files not importing into Outlook. This makes it simple for people to convert large EML files. There are no size limits, so it's a safe and dependable way to deliver many EML files at once. With just a few clicks, the files will be converted with all of their data files, attachments and the same structure and organization. Now let's see how to use the tool:
1. Download the apps on your computer.

2. To choose EML click or choose "files or folders."

3. Now, choose PST as the file type, the path to save converted files and how you want to name them.

4. Finally, click "Convert" to finish.
Main Features
1. If you don't know why Outlook won't import big EML files, this way lets you convert many of them at once without any concerns with size.
2. You can bring in a number of large EML files at once without losing any data.
3. It maintains all the text, links attachments, metadata and so on.
4. The original folder structure and file structure are not changed.
5. You can pick one main folder and then it will automatically sync all of the EML folders, subfolders and files from that main folder to all of your other folders.
6. This program also lets you import your EML files directly into Outlook without losing any data and having any problems. You don't even need an email program to do this.
7. It works with Microsoft Windows systems.
Final Thoughts
Outlook doesn't support the EML file directly and can't import it. This makes things difficult for people. This blog taught us why Outlook won't accept large EML files and how to fix the problem. Drag-and-drop works great for small number of EML files. You should use a professional utility to verify that large EML emails are safe and accurate, though.
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