How to migrate MSG to EML while preserving the folder structure?

When you have MSG files spread across several folders, the main thing is to avoid converting them individually and then having to reorganize everything afterward. A batch MSG-to-EML converter that can process the folders recursively is much more practical.

Yes. For thousands of MSG files across multiple folders, I would use a dedicated batch MSG-to-EML converter rather than Outlook/manual export.

The important features to look for are:

• Recursive folder processing — processes folders and subfolders.

• Preserve folder hierarchy — output mirrors the original structure.

• Batch conversion — handles thousands of files.

• Preserves headers, sender/recipient information, dates, HTML content, and attachments.

• Prefer an offline/local tool, especially if the emails contain confidential or forensic evidence.

For example, tools such as Total Mail Converter, RecoveryTools MSG to EML, and ZOOK MSG to EML advertise batch conversion with folder-hierarchy preservation.

For a large migration, I would first test the tool on a copy of 2–3 representative folders, including nested folders and emails with attachments, then compare the source and converted files before processing the entire archive.

If this is for digital-forensics/e-discovery, I'd also preserve the original MSG files untouched and record hashes/logs before conversion.

If you need to migrate MSG files to EML while preserving the original folder structure, it's best to use a conversion tool that supports batch processing and folder hierarchy retention. This ensures that emails remain organized exactly as they were in the source folders, IPO Calculator, making the migration process much smoother and reducing the risk of misplaced messages.

If your intention is to transfer MSG documents to EML format while keeping the folder hierarchy of the source data unchanged, I recommend using the Softaken MSG to EML Converter. I used this product on a number of email migration projects, and found that the software retained the original folder structure.

The software allows users to convert .msg files to Second Storage Format (EML) with attachments, email formatting, metadata, timestamps and folder organization preserved. This is particularly critical when dealing with a large number of archive files, because the process of manually converting each file runs a risk of having folders placed into the wrong structure or being mixed in.

To convert MSG files to EML:

1. Download and install the MSG Converter software to your computer.

2. Open the software.

3. Add either all of your MSG files (or complete folders containing MSG files) to be converted.

4. Select the output type of EML from the drop down box.

5. Choose where you want EML files saved.

6. Click Start to begin converting your MSG files to EML.

You also can convert multiple folders at once through the software's bulk conversion feature without changing the hierarchy of the folders. You can also download and use the trial version of the software to ensure that the conversion will work properly before you purchase the full version.