Corbett
Corbett Maildir Backup Software opens Maildir folders on Windows and saves the mail to files that open anywhere. Four preview modes show the data first. Folder hierarchy, contacts and attachments stay intact. Output formats include PST, MBOX, EML, MSG, PDF, HTML, CSV and TXT. Free demo included.
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Maildir folders are read from local disk. Corbett never handles the mail.
Free demo, scanned clean on VirusTotal and a 30-day money-back window.
Lifetime licence from $99 Free trial saves 10 emails per folder
Server folder coverage
A Maildir folder stores every message as its own file. That suits servers, but it is hard to open, share or archive on Windows. Maildir Backup Software reads the folders and saves mail as files that normal mail apps accept.
Kept from Maildir
7Maildir parts
7Saves as
8Not included
4Maildir folders are built for servers, not desktops
One file per message suits a mail server and nobody else. Copying thousands of tiny files by hand leaves gaps. A backup tool reads the entire structure and outputs files that open anywhere.
Related backup pages: Thunderbird backup tool, Gmail backup tool, Outlook.com backup tool, Yahoo backup tool and Webmail backup tool. Any other mail app or server is on the email backup software page.
Quick answer
Maildir Backup Software is a Windows program that reads Maildir folders from disk and saves the mail as PST, MBOX, EML and more. No mail login is needed because the data is already on your drive.
What it saves
Maildir messages, attachments, folders and contacts
Where it saves
A folder, a USB drive, a network share or an IMAP account
Who uses it
Admins and users holding Maildir folders on Windows
Core features
From opening the folder to the saved files, in the order the steps happen.
Open Maildir
Install the tool on Windows and start it. The Maildir input sits in the Email Data Files list under Open. Several Maildir files and folders can go in together.
No mail login is needed because the data is already on disk. Add one or many Maildir folders and keep going.
Folder selection
Upload the folder to the software and click the Select Folders icon. It shows a checkbox tree with a count on every folder.
A tick box sits on every folder and subfolder. Original hierarchy is kept on disk and empty folders stay out of sight.
Message preview
View mailbox data before saving. Four preview modes make a broken message or a wrong folder easy to spot.
Content shows the readable mail, message header lists sender and route, properties hold item details, and raw message with hex view show the stored text.
Selective backup
Filters can narrow the list by date, To, From, name, subject, CC, content, attachment, file name and size. Only selected mail is saved.
Add property name, ID and value filters, keep only mail with attachments and skip duplicates. A Maildir with years of mail can be cut down before exporting.
Output options
Select a destination on the computer, an external drive or a flash drive, then start the export. Naming options keep thousands of files easy to search.
PST, MBOX, EML and MSG for mail clients, plus PDF, HTML, CSV and TXT. Send Maildir mail into an IMAP account with the email migration tool.
Flexible use
One Maildir, many Maildirs or a move to an IMAP account: Maildir Backup Software handles all three. Test your job in free demo before you buy.
Back up one Maildir folder
Select the folder, tick sub folders and save a PST or PDF copy.
Back up several Maildirs
Add every Maildir folder, then process them in one go. Every folder gets a separate file.
Move Maildir mail to an IMAP account
Name a live IMAP mailbox as the target and mail lands in matching folders.
Before connecting
Three habits for a clean export.
Source
Copy the Maildir first
Work from a copy of the folder if the mail server is still live, so no new message lands mid-backup.
Target
Match the next app
Outlook reads PST. Thunderbird reads MBOX. Select the format that the next app needs.
Scope
Use filters for big folders
A Maildir with years of mail can be cut down by date or sender before exporting.
Related reading: Maildir to PST and Extract email addresses from Maildir.
Working process
Follow four steps to get Maildir mail into files that open anywhere. Practice on one folder in free demo.
Install and open the tool
Download the setup, install it on Windows and open Corbett Maildir Backup Software.
Open the Maildir folder
Choose Maildir from the Email Data Files list under Open, then click the Select Folders icon and browse to the folder.
Select folders, filters and format
Tick folders, limit by date, sender or subject, then choose PST, MBOX, EML, MSG, PDF, HTML, CSV or TXT.
Start Maildir backup
Press Export and track every folder on the progress screen. A log and a CSV report list all saved mail.
Want screenshots for every click? Follow IMAP backup guide.
Working process
Rather follow screenshots? IMAP backup guide shows a Maildir backup click by click.
Advanced options
Small options that save time on folders with thousands of files.
Many files in one go
No limit on file size
No server login
Folder is loaded from disk
Several Maildirs queued
One separate file per folder
Counts per folder
A tally beside every folder
Date range filter
Frame the backup with start and end dates
Property filters
Name, ID and value filters
Attachment filter
Only mail with files attached
Four preview modes
Content, header, properties and raw view
Naming options
Set file names for output
Resume on drop
A broken connection resumes, not restarts
Folder, USB or NAS
Save to a folder, USB drive or network share
Log and CSV report
Proof of what was saved
Choose output
Eight output formats are on offer. Match the format to what you plan to do with the saved mail.
| Format | Best for | Opens in |
|---|---|---|
| PST | Outlook users and mail that may return to an account | Microsoft Outlook |
| MBOX | Moving mail to a free email client | Thunderbird and Apple Mail |
| EML | One file per email, easy to search | Windows Mail and most email clients |
| MSG | Single messages kept as Outlook items | Microsoft Outlook |
| Printing and reading without Outlook | Any PDF viewer | |
| HTML | Reading mail with no email client | Any web browser |
| CSV | Lists of senders, dates and subjects | Excel and Google Sheets |
| TXT | Plain text archives of old messages | Any text editor |
Free demo
See Maildir Backup Software Work on One Account
Install the demo, open a Maildir folder, tick one folder and choose a format. Files appear only after the backup starts.
Download free demoTry before you buy
Free demo opens a Maildir folder, shows every folder, applies every filter and previews mail. Only saving is capped.
| Feature | Free demo | Full version |
|---|---|---|
| Maildir folder open and folder list | Yes | Yes |
| Preview, filter and analysis views | All available | All available |
| Emails saved per folder | 10 | Unlimited |
| Mailbox size limit | Saving stops at 10 per folder | None |
| Price | Free | $99 one time |
| Machines per licence | Not applicable | Up to 5 |
| Money back window | Not applicable | 30 days |
Use cases
Anyone holding Maildir folders that must open on Windows.
Server admins
Archive Maildir folders in open formats before a server is changed or retired.
Users with copied Maildirs
Open a Maildir pulled from a server or an old Linux machine on Windows.
Teams moving to Outlook
Save Maildir folders as PST files. One licence installs on up to 5 machines.
Why Corbett
One licence
Covers Maildir and 209+ other providers
No subscription
Lifetime price from $99
Read-only access
Nothing is deleted in Maildir
Direct connection
No Corbett server in between
Eight formats
Plus move to a new inbox
No size limit
Any mailbox size or message count
Free demo
10 emails saved per folder
30 day money back
Refund window on every licence
Before purchase
Maildir files can be copied by hand, but one message per file means a lot of files and no readable result. This table shows the gap.
| Task | Manual copy | Maildir Backup Software |
|---|---|---|
| Price | Free | $99 one time |
| Read one message | Open in a text editor | Not needed |
| Thousands of messages | No clear result | Saved in one go |
| Mail files for Outlook | Not possible | PST output |
| Contacts and addresses | Hunt through files | Separate export option |
| Find by property | Searching text by hand | Property name, ID and value filters |
| Output choice | None | PST, PDF and six more |
| Data integrity | Depends on care taken | Kept intact |
Rows tinted green are where manual work is enough.
A single message opens in any text editor. Archiving full Maildirs for Outlook is covered in Maildir to PST. A finished file converts to other formats with the email converter tool.
Global recognition
Users rate Corbett backup software 4.6 out of 5 across 683 reviews, and software directories list it.
CNET
Download.io
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TopSoftware Advisor
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Specifications
Download details
System
Supported editions
Windows 11, 10, 8.1, 8 and 7, in 32 and 64 bit. Windows Server 2025 down to 2008. Outlook is not required.
No macOS or Linux build.
Corbett has built Windows email utilities since 2020. Support for Maildir Backup Software is handled by the team that wrote it.
Full specification
Complete source and output list for Corbett Maildir Backup Software.
Goes in
Maildir sources
Comes out
Backup destinations
To convert saved files later, use email converter tool or single-format PST File Converter Tool, MBOX File Converter and EML Converter Tool. To move Maildir mail between servers, use IMAP Migration Tool. To open a saved file without exporting, use free email viewer software.
User testimonials
Drawn from 683 reviews of the Corbett wizard behind Maildir Backup Software.
Pulled from 683 reviews on rating sites and customer emails. Below are three, quoted exactly.
I was stuck in a situation where I had to backup my maildir files for some personal issues. I tried a lots of method but none of them backup emails in a bulk. Then after a lot of search I came up on this tool. This tool helped me backup all my emails.
Backup maildir emails is quite complex due to abrupt data loss and time-consuming method. Then I heard about this software. It helped me backup maildir emails in few minutes and easily without any type of data loss. This tool worked well
This tool is has a potential to backup files in multiple file formats like PST, MBOX, MSG etc. This maildir backup tool is also providing date filtering option to filter maildir emails. I recommend you to go with this software.
Best practice
Saved mail is only useful if it opens later. These four habits protect your Maildir archive.
Copy before you read
Work from a copy of a live Maildir so no new message lands mid-backup.
Open a sample file
After saving, open a handful of messages. Confirm folders, contacts and attachments came across.
Keep PST and PDF
Repeat the backup with a second format. PST for Outlook and PDF for reading anywhere is a common pair.
Store a copy elsewhere
Keep one copy on a drive and one on a USB drive or network share, named by folder and date.
Common questions
Steps, demo limits, bulk backups and attachments.
Download and install the software, select the Maildir folder, review the preview, choose a format and start the backup.
Yes. It saves 10 messages per folder, enough to check the result.
Yes. The tool is built to save multiple Maildir files in one session.
Yes. Choose the option to export particular mail files and select attachments.
No. There is no limit on the size of files saved.
Yes. Contacts and email addresses have their own options. See Extract email addresses from Maildir.
PST, MBOX, EML and MSG for mail clients, plus PDF, HTML, CSV and TXT for documents.
Yes. Name a live IMAP account as the target. For a server cutover, use the IMAP Migration Tool.
Yes. Add every Maildir folder, then process them in one go. Every folder gets a separate file.
No. The folder is loaded from disk.
Yes. Folder and file hierarchy stay intact.
Date, To, From, name, subject, CC, content, attachment, file name, size and property filters.
Windows 11, 10, 8 and 7, plus lower editions. Windows Server 2008 and newer also work.
One payment of $99 buys a lifetime licence for up to 5 machines, with a 30 day refund window.
The link and key arrive by email after payment.
No. It is a Windows tool.
No. Folders are read from your local disk and the backup is written to your drive. Corbett never touches the mail.
A Maildir stores every message as its own file inside cur, new and tmp folders. That suits mail servers but is hard to open, share or archive on Windows.
No. It only reads the folder. Keep a copy of a live Maildir so no new message lands mid-backup.
Save a PST. Steps are in Maildir to PST, and Import PST to Outlook covers the last step.
Yes. Open it read-only in the free email viewer software.
Yes. It opens the folder, shows every message and applies every filter. Saving stops at 10 messages per folder.
Step by step
Guides for Maildir folders.
Maildir guides
Server mail tools
The full list of providers sits on the email backup software page. Server cutovers use the IMAP Migration Tool, and putting saved mail back into an inbox uses email recovery software. Related backups: Gmail backup tool, Outlook.com backup tool, Yahoo backup tool, Hotmail backup tool, iCloud backup tool, Thunderbird backup tool and Webmail backup tool.
Get started
Get the demo, open a Maildir folder and save sample mail from every folder. A lifetime licence is one $99 payment with 30 days to ask for a refund.
Download free demo Purchase now
87.4 MB · Windows 11 to 7 and Windows Server 2025 to 2008 · 30 day money back