Import EML to Thunderbird: In Easy Steps Without Data Loss

User Query:

I have a stack of EML files from my office emails. I want to bring them into Thunderbird, but not sure how to avoid losing stuff. Can someone help?

 

Summary: The EML files store a lot of messages, and these files work well with email clients like Thunderbird and Outlook. If you want to import EML to Thunderbird, then this blog will help you. Here, we will cover the manual methods to back up your files to import them into Thunderbird. In addition, we will use the CloudXena EML Converter Tool to make the process simple and short.

Common Reasons to Import EML Files into Thunderbird

  • Importing EML files helps make sure your old emails don’t get deleted or forgotten.
  • If you switch email programs, importing EML files lets you bring your messages along without starting fresh.
  • Thunderbird lets you access your emails on various devices once they’re imported.
  • If you change computers, importing ensures your emails come with you without any loss.
  • Thunderbird has good search features, so imported emails are easier to locate when you’re looking for something specific.

How to Import EML to Thunderbird Manually?

The following two manual methods can be done right inside Thunderbird. Here’s how:

1) Convert EML to Thunderbird via Drag & Drop

  1. Firstly, open Thunderbird and create a new folder under Local Folders.
  2. Then, give the folder a name and click OK.
  3. Afterwards, go to the location where the EML files are stored.
  4. Thereafter, select the files you want.
  5. After that, drag and drop them into the new folder in Thunderbird.
  6. Lastly, check the folder where all the EML messages are.

2) Transfer EML to Thunderbird Using ImportExportTools NG

  1. Firstly, open Thunderbird, click on More, then go to Add-ons & Themes.
  2. After that, find and install the ImportExportTools NG add-on if you haven’t already.
  3. Restart Thunderbird after installing.
  4. Create a new folder like before.
  5. Right-click the new folder, select ImportExportTools NG from the menu.
  6. Then, click Import Messages, then choose EML.
  7. At last, browse your computer, select the EML files, and click Open to import them.

Common Issues and How to Fix Them

Problem Why It Happens What You Can Do
Emails don’t show up after import Some EML files were missed during import Try importing the missing files again and refreshing the folder
Thunderbird freezes or slows down Too many files were imported at once Import the files in smaller batches
Attachments are missing The EML file may be damaged Check the file or try importing it again
Folder order changes Manual import doesn’t keep the folder layout

Rearrange folders manually after import

Limitations

  • Large or damaged EML files might not import correctly.
  • Attachments and formatting can sometimes break.
  • The original folder structure may not stay the same.
  • ImportExportTools NG requires installing an add-on.
  • Importing many files at once can slow down or crash Thunderbird.
  • Complex emails (with images or special formatting) might not import perfectly.
  • The process can be tricky for beginners.

Import EML to Thunderbird Using Simple Steps

Manual methods to import EML files are free but can cause problems. The CloudXena EML Converter Tool helps you convert files without losing data. It keeps the original formatting. The tool can change EML files into MBOX and other types. You can also use it to import EML to Google Workspace and other email clients. It lets you convert many files at once, with no size limits. The results are accurate.

Steps to Upload EML Files to Thunderbird

  1. Firstly, download the EML Converter Tool.
  2. Step-1
  3. Afterwards, add EML files and hit Next.
  4. Step-2
  5. Then, preview and select files and click Next.
  6. Step-3
  7. Thereafter, select Thunderbird format.
  8. Step-4
  9. Lastly, apply filters, set the destination, and click Convert.
  10. Step-5

Conclusion

To conclude, in this blog, we talked about the common reasons to convert the EML file into Thunderbird. Here, we covered three methods: manual and the automated tool approach. Both methods are able to import EML to Thunderbird, but there are limitations manually. For a heavy workload, using the professional tool is a great and reliable choice for a smooth migration.

Frequently Asked Questions

Q1.  Can I securely import EML files into Thunderbird?

Ans.  Using the CloudXena EML Converter Tool, you can securely import your EML files to Thunderbird. It has a zero data storage policy and keeps your data intact.

Q2.  Is it possible to convert EML to Thunderbird on Mac?

Ans.  Using the professional tool called EML Converter Tool by CloudXena, you can easily convert your file on a Mac. It supports both operating systems.

Q3.  Is there any limit on file size to transfer EML to Thunderbird?

Ans.  No, there is no such file size limitation with the smart utility. But with the manual method, it may cause errors for large files, and you may lose any information.

Q4.  Can I import EML to Thunderbird with attachments?

Ans.  The CloudXena EML Converter is an effective solution to import EML files into Thunderbird with attachments. Moreover, it has smart features and a preview panel to view files before migration.

About The Author:

I, Simran Bhatia am a Technical Content Writer specializing in data management, email migration, and data recovery IT solutions. My focus is on simplifying complex processes into clear, practical guides that combine technical accuracy with real-world value for IT admins, decision-makers, and everyday users. For me, writing is not just about explaining technology, it’s about making it accessible, reliable, and valuable for readers.

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