Corbett
Corbett MBOX to EML Converter turns MBOX files from Thunderbird, Eudora, Opera and similar clients into EML in bulk or by selection. Attachments, folder tree and full data integrity stay intact. Other outputs include PST, PDF, CSV, vCard, HTML and TEXT. A free demo is included.
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Conversion runs on this PC. MBOX files are not sent to Corbett.
Free demo, scanned clean on VirusTotal and a 30-day money-back window.
Lifetime licence from $99 Demo converts 10 data files
EML facts
MBOX packs a folder into one big file, and EML stores one message per file. This tool splits MBOX files from Thunderbird, Eudora, Opera and similar clients into EML messages, with attachments and folder hierarchy intact.
What stays in the EML output
Mail clients with MBOX storage
Outputs
What the tool skips
Why MBOX Mail Gets Converted to EML
Outlook, Windows Mail and many viewers accept EML but not MBOX. After an MBOX file is split into EML messages, any of them opens with a double click, and the folder structure stays where it was.
Core features
Download, load the MBOX files, apply filters and save as EML.
Load
After setup, open the Open menu and select Email Data Files. A file mode and a folder mode feed the MBOX data into the left panel.
Folder selection
All loaded MBOX folders are listed in a tree. Tick the folders needed and clear the others, so only those messages become EML files.
Message preview
Every message can be opened before conversion in views such as Hex view, Raw message and Content, so a wrong file is caught early.
Selective backup
Search operators sort the mail first. Narrow by To, From, Date, Subject, Cc, Name or Has attachments, then export only the matches.
Output options
Save EML files to a local drive with the Browse option, or move the mail on. The software also exports to PST, PDF, CSV, vCard, HTML and TEXT, and uploads to Gmail and Office 365.
Before converting
Three habits keep an export tidy.
Source clients
Know where the MBOX came from
Thunderbird, Eudora and Opera Mail files all load. Note the client name so the right folder can be matched to the right EML output later.
Server login
Let the software find the server
For a live account upload, type the login details and the tool detects the host name and port on its own.
Output folder
Use an empty folder
Send the output to a new folder so EML messages stay separate from older data and are quick to locate.
Moving the EML files on is covered in Import EML files to Outlook and Import EML to Thunderbird account.
Free demo
Free Demo of MBOX to EML Converter
The demo is a short install and converts 10 data files. Open the EML results in a mail client before buying.
Download free demoBefore purchase
Thunderbird saves a message as EML one at a time. Large MBOX archives and files from other clients call for a bulk tool. The table sets the two ways side by side.
| Task | Manual save | Tool |
|---|---|---|
| Cost | Free | $99 one time |
| A few messages | Save as in Thunderbird | Works too |
| Full mailbox | Message by message | Bulk in one run |
| MBOX from other clients | Needs that client | Any client's file loads |
| Folder hierarchy | Rebuilt by hand | Kept intact |
| Filters | Client search only | To, From, Date, Subject, Cc |
| Other formats | None | PST, PDF, CSV, vCard, HTML |
| Item extraction | Not offered | Addresses, attachments, contacts |
Green rows mark where saving by hand is enough.
For a few messages the client does the job. A Gmail example is in Import MBOX to Gmail .
Specifications
Download details
System
Supported editions
Windows 10 in 32-bit or 64-bit and every earlier version.
No macOS or Linux build.
Corbett has built Windows email utilities since 2020. Support for the converter comes from the people who build it.
Working process
Prefer screens? The Open MBOX file post shows how an MBOX file looks inside.
Common questions
Steps, size limits, client support and the demo.
Install the tool, open the Open menu, select Email Data Files, load the MBOX file, set the filters and click Save.
No. The tool is designed to work with terabytes of data at once.
Yes. Eudora MBOX files load, and so does mail from 100+ email providers.
The demo converts 10 data files per run. The licensed version has no such cap.
Yes. EML files keep their attachments, and attachments can also be saved alone.
Yes. The original structure carries over to the EML output.
Yes. Filter by To, From, Date, Subject, Cc, Name or Has attachments, or tick single files and folders.
Yes. Email addresses, attachments and contacts can be extracted from MBOX mail.
PST, PDF, CSV, vCard, HTML and TEXT, plus Gmail and Office 365 uploads.
Hex view, Raw message and Content, among others.
Windows 10 in 32-bit and 64-bit and every earlier version.
Personal is for 2 PCs, Business is for 10 PCs and Enterprise is for any number of PCs.
Yes. Every purchase has a 30 day refund window.
512 MB at the minimum, and 1 GB is recommended, plus 100 MB of free disk space.
No. Conversion runs on your PC. Only an upload to Gmail or Office 365 sends mail out, straight to that provider.
Step by step
Posts on MBOX files and where they go next.
Thunderbird and Outlook
Hosted accounts
Live account moves go through the Email Migration Tool . Server cutovers use the IMAP Migration Tool. More conversions sit in the email converter tool. Damaged mail files belong to the email recovery software. Free MBOX reading is possible in the email viewer software. Format pages: MBOX to PST Converter and MBOX to PDF Converter. Also see the EML Converter Tool, MBOX Converter, Thunderbird Backup Tool, Thunderbird Migrator and Gmail Backup Tool.
User testimonials
376 ratings from users who moved MBOX files to EML with Corbett.
Collected across 376 reviews from software portals and user mail. The three quotes keep their original wording.
With this MBOX to EML Converter tool tool by Corbett Software, I easily managed to convert and move my Thunderbird MBOX files to EML. I would recommend this application to anyone who is looking for an MBOX file to EML conversion tool.
I wanted to keep my Opera email files in my Outlook account. After sifting through multiple solutions available online, I decided to go with this MBOX to EML conversion tool. Obviously, I'm happy with my purchase. Recommend this app to everyone.
I wanted to shift my email account to Outlook from Thunderbird. But for that, I had to first convert my Thunderbird mail to EML format. I used this MBOX to EML converter tool by CorbettSoftware for this. Amazing software!
Get started
Get the demo, convert one folder and check the EML files in a mail client. A $99 licence is a single payment with a 30 day refund window.
Download free demo Purchase now
47.6 MB · Windows 10 and earlier · 30 days money back