Corbett

EML to MBOX Converter

Corbett software converts specific or bulk EML files to MBOX with folder hierarchy and 100% data integrity. Output also covers PST, PDF, HTML, TEXT, CSV and vCard, plus Gmail and Office 365. Windows only, free demo included.

Download free demo Purchase now

4.7 out of 5 from 598 reviews

Conversion runs on this PC. Corbett never receives EML files.

Free demo, scanned clean on VirusTotal and a 30-day money-back window.

Lifetime licence from $99 Demo converts 10 messages per folder

MBOX facts

EML to MBOX Converter Built for Thunderbird and Apple Mail

Thunderbird and Apple Mail keep mail in MBOX, while EML files sit loose in folders. EML to MBOX Converter gathers those files into MBOX with the folder hierarchy and every attachment intact.

Intact in MBOX

  • Folder hierarchy
  • Attachments
  • Email addresses
  • Subject lines
  • Dates and times
  • Cc and Bcc fields
  • Message bodies

Loadable EML items

  • Single EML files
  • Folders of EML files
  • Mail from any client
  • Any amount of files
  • Mail with attachments
  • Contacts in EML files
  • Phone numbers and photos

Outputs

  • MBOX
  • PST
  • EML
  • PDF
  • HTML
  • TEXT
  • CSV and vCard
  • Gmail and Office 365

Left unconverted

  • Server logins
  • Mail client settings
  • Account passwords
  • Mail rules

Why Move EML Files Into MBOX

Loose EML files are hard to archive and slow to open as a set. MBOX bundles a folder into one file that imports cleanly into Thunderbird, Apple Mail and other clients. The software does the bundling in batch.

Import MBOX to Thunderbird account

Core features

How EML to MBOX Converter Works

Install, add the EML files, choose the items and export to MBOX.

EML file loading screen

Add

Add EML Files With Open Account

Click Add, then Open account, and insert the EML files. The preview panel lists them together with their attachments.

  • Files or folders added
  • Mail from any client accepted
  • Terabytes of data handled
  • Preview panel shows attachments
EML folder tree with selection checkboxes

Folder selection

Choose Files or Folders to Convert

Tick single files or full folders. Only ticked items go into the MBOX output.

  • Folder hierarchy kept as it is
  • Files or folders selectable
  • Bulk conversion in one go
  • Unticked items left behind
Message preview with hex and raw views

Message preview

Preview EML Messages First

View an EML file with its attachments before converting, so only the right messages reach MBOX.

  • Content shows the body and attachments
  • Message header lists From, To, Cc and Subject
  • Properties reports message data
  • Hex view and raw message reveal the code behind the mail
Search filters for selective conversion

Selective backup

Search EML Mail With Advanced Filters

Filter by From, To, Cc, Name, Subject, Date from, Time from or Has attachments. Convert only the matching messages to MBOX.

  • From, To and Cc
  • Name and Subject
  • Date from
  • Time from
  • Has attachments
  • Matching mail only
Export format and destination options

Output options

Select MBOX or Another Output

MBOX is the main output. The same load can also go to PST, EML, PDF, HTML, TEXT, CSV or vCard, to Gmail and Office 365, or through the Extract menu for addresses, contacts, phone numbers, photos and attachments.

Before converting

Setup Checks Before the First Run

Short checks before the first run.

Server details

Settings are auto detected

The software detects the email server address and port number of common mail applications, so an upload needs only a login.

Disk space

Leave 150 MB for the install

The install needs 150 MB. Output size depends on the mail, so keep spare room on the target drive.

Permissions

Run as Administrator

Launch the wizard with Run as Administrator so the output folder can be written without a permission error.

After conversion, import steps are in Import MBOX to Thunderbird account and Import MBOX to Gmail.

Free demo

Try EML to MBOX Converter Free

Install the demo and convert 10 email messages per folder. Open the MBOX in the target mail client before buying.

Download free demo

Before purchase

Dragging Files In or Using EML to MBOX Converter

Dragging EML files into a mail client moves a few messages. Large folders, filters and other formats need the software. The comparison shows where the manual route stops.

Task Manual import Converter
Cost Free $99 one time
A few messages Drag into the client Works too
Large folders Slow, one by one Bulk in one go
Folder hierarchy Rebuilt by hand Kept intact
Data size Depends on the client Terabytes handled
Other formats None PST, PDF, HTML, CSV and more
Filters Client search only Eight search fields
Item extraction Not offered Addresses, contacts, attachments

Green rows mark where dragging files in is enough.

For a few files the client works. A webmail example is in Import EML to Gmail .

Specifications

EML to MBOX Converter Specs

Download details

Version
4.1
Download size
47.6 MB
Demo limit
10 messages per folder
Delivery
Link and key by email
Licence
Lifetime, from $99
Download Now

System

Hard disk
150 MB free space
RAM
4 GB minimum
Processor
1 GHz Pentium, 2.4 GHz better
Interface
English
Input
EML files and folders

Supported editions

Windows 11 (64-bit), 10, 8 and 7 in 32-bit or 64-bit, plus Windows Server 2016, 2012 R2 and 2008.

Launch with Run as Administrator. No macOS build.

Corbett has built Windows email utilities since 2020. The people who build the converter answer support questions.

Working process

Watch the Tool Work

Want screens? The EML to MBOX guide shows the same steps.

EML to MBOX walkthrough

Common questions

EML to MBOX Converter: Common Questions

Steps, integrity, formats and the demo limit.

How do I get from EML to MBOX?

Install and launch the software. Click Add, then Open account, to add the EML files. Choose the files or folders to convert and click Export.

Will converted data stay intact?

Yes. Data integrity is guaranteed at 100%, and a refund is possible within 30 days if the tool falls short.

Can it output formats besides MBOX?

Yes. PST, EML, PDF, HTML, TEXT, CSV and vCard are available too.

Can I convert only certain items such as email addresses?

Yes. The Extract menu at the top left saves email addresses, contacts, phone numbers, photos or attachments from your EML files.

Can one run cover many EML files?

Yes. Bulk conversion handles many EML files at once, to MBOX or to other formats.

Is there a size cap?

No. The number of files is unlimited, and testing showed the tool handles terabytes.

Is the folder hierarchy preserved?

Yes. Your original folder structure stays unchanged through the conversion.

Which search fields can I use?

From, To, Cc, Name, Subject, Date from, Time from and Has attachments.

Can EML mail upload to Gmail or Office 365 directly?

Yes. IMAP servers work too, including Yahoo, AOL, Hotmail, iCloud, GoDaddy, Bluehost and Mail.com.

What Windows releases are supported?

Windows 11 (64-bit), 10, 8 and 7, plus Windows Server 2016, 2012 R2 and 2008.

What does the demo convert?

10 email messages per folder. The full version has no such cap.

Does the software support Mac computers?

No. Only Windows is supported.

How do I receive the software?

Once payment clears, an email arrives with your download link and activation key.

Does my mail leave this PC?

No. Conversion happens on your PC. A mail upload is the only step that sends data out, directly to the provider chosen.

Where is the Extract option?

At the top left of the software interface. Open the drop down list and choose the item to extract.

Step by step

Posts for MBOX and EML Files

Posts for MBOX and EML files.

Open MBOX in a client

Upload to webmail

Work with EML

Transfers between accounts start at the Email Migration Tool . Server cutovers use the IMAP Migration Tool. Other conversions are listed under the email converter tool. Damaged files belong to the email recovery software. Files open free in the email viewer software. Related converters: EML Converter Tool and EML to PST Converter. Also see the MBOX Converter, Thunderbird Backup Tool, Gmail Backup Tool, Thunderbird Migrator and Gmail Migration Tool.

User testimonials

EML to MBOX Converter User Reviews

Scores from 598 customers who moved EML folders into MBOX.

4.7 out of 5

Collected across 598 reviews collected from rating sites and customer emails. All three quotes are unedited.

Quick conversion

I wanted to convert my EML files into MBOX format as quickly as possible. Upon suggestion of a colleague I decide to give this EML to MBOX conversion tool a try. I think the application works really well, and I’m satisfied with it.

James Collins

No hassles

This EML to MBOX converter software is a great application for converting your EML files withthout any hassles. I had to convert multiple EML files into MBOX format. Upon the suggestion of my colleague, and suffice it say, I'm happy with the software.

Christian Pjnaic

Fast and simple

I give this application a rating of full stars. What I liked most about this software was its fast conversion rate and the simple interface. I really didn't face any trouble with using the tool anywhere, even though I know barely know anything about IT. I am lucky that I buy EML to MBOX converter full version.

Quina Frew

Get started

Move EML Mail Into MBOX Today

Install the free demo, convert a folder and open the MBOX in a mail client. One payment of $99 buys the licence, and refunds are accepted for 30 days.

Download free demo Purchase now

47.6 MB download · Windows Server 2008 and newer · 30 day refunds