Corbett
Corbett GMX Backup Software saves GMX mail, contacts and calendars to a local drive, or sends them straight to other email services. It finds the server details on its own and keeps folders and attachments. Output formats include PST, MBOX, EML, MSG, PDF, CSV, HTML and TXT.
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GMX mail is pulled down to your PC. Corbett receives nothing from the account.
Free demo, scanned clean on VirusTotal and a 30-day money-back window.
Lifetime licence from $99 Free trial saves 10 emails per folder
GMX mailbox coverage
GMX keeps mail, contacts and calendars on its own servers. A forgotten password, a closed account or a bad sync can cost all three. GMX Backup Software writes a full copy to a drive that you own while the login still works.
GMX mail covered
3GMX data types
7Saved items
7Left on the server
4GMX mail disappears with the login
GMX mail lives on a remote server. Lose the password or let the account lapse and the history stops being reachable. A local copy in standard formats keeps it open.
Other webmail pages: Gmail backup tool, Yahoo backup tool, Outlook.com backup tool and Webmail backup tool. Any other IMAP account is on the email backup software page.
Quick answer
GMX Backup Software is a desktop program for Windows. Add a GMX login and password and it finds the server details on its own, then exports mail, contacts and calendars as local files.
What it saves
GMX mail, attachments, contacts and calendars
Where it saves
Your PC, an external disk, a USB drive or shared network storage
Who uses it
Anyone whose GMX mail, contacts and calendars are worth keeping
Core features
Five screens of GMX Backup Software, in backup order.
Open and add
Press Open in the menu, type the GMX login and its password and press Add. The software detects the server address and port itself.
Mailbox size has no limit, several accounts can be managed from one place, and every account can be edited or removed at any time.
Folder selection
Browse Sent, Inbox, Drafts and the rest before anything is saved. A missing folder shows up at this stage.
Folders list in the same order as in GMX, and nesting stays the same in saved files. Tick several folders and save them in one session.
Preview
Mail items open with all header fields, and files attached to mail appear in view. A wrong folder or an empty thread shows up early.
Folders list in mailbox order, mail items show every header field, files sit beside their messages, and the address book comes across as well.
Selective backup
Cut a large mailbox down to what matters. Filters cover sender, recipient, CC, name, content, attachment status, date range and file size.
Email addresses can be saved through the Extract tab, so lists of senders come out without saving full messages.
Output options
Press Export, select a file type and set the destination. Mail saves to a local hard drive, or moves on to a supported web service.
Output can be PST, MBOX, EML, MSG, PDF, HTML, CSV or TXT. Moving GMX mail into Outlook is covered in Transfer GMX mail to Outlook, and Gmail moves in Export GMX mail to Gmail.
Flexible use
One mailbox, several accounts or a new mail service: GMX Backup Software handles all three. Test your job in free demo before you buy.
Back up one GMX mailbox
Add a single mailbox, tick your folders and save a PST, MBOX or PDF copy before the account goes inactive.
Back up several accounts
Add every GMX account you own and save every account to its own folder in one session.
Move GMX mail to a new account
Name a live Gmail, Yahoo or Office 365 mailbox as the target. Messages move across in matching folders, dates untouched.
Before exporting
Three short steps to finish before the export starts.
Check
Test the mailbox login
Open GMX in a browser with the same ID and password. A working login there means the software can connect.
Plan
Leave room on the drive
Attachments add up fast. Point the export at a disk with generous free space.
Order
Try one folder first
Save one small folder with the demo and compare the output against webmail.
Outlook users can follow Transfer GMX mail to Outlook, Thunderbird users Transfer GMX emails to Thunderbird and Gmail users Export GMX mail to Gmail.
Working process
Follow four steps to get a GMX mailbox onto your drive. Practice on one mailbox in free demo.
Open the software and add the mailbox
Download GMX Backup Software, install it and press Open in the menu. Type the GMX login and password and press Add.
Select GMX folders and filters
Your mailbox loads as a tree. Tick the folders to archive, then limit them by sender, recipient, date, attachment status or file size.
Select format and location
Choose a file type from PST, MBOX, EML, MSG, PDF, HTML, CSV or TXT, then point the tool at any local drive, USB stick, external disk or NAS.
Start GMX backup
Press Export and track every folder on the progress screen. Afterwards, a log and a CSV report list all saved mail.
Want screenshots for every click? Follow IMAP backup guide.
Working process
Prefer screenshots? IMAP backup guide covers the full flow in minutes.
Advanced options
Small options that save hours on big mailboxes.
Auto server detection
Finds server address and port after login
No size limit
Any mailbox size or message count
Many mailboxes
Several accounts from one place
Date range filter
Save mail from one month or one year
Attachment status filter
Save only mail that carries files
Sender and content search
Filters cover From, To, CC, name and content
File size filter
Set size limits on saved mail
Split PST by size
Cut large PST output into smaller files
Unicode PST
Modern PST format with a 50 GB default limit in Outlook
USB, drive and NAS
Save to USB, external disk or network storage
Live progress
Watch every folder as it saves
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 your GMX mail.
| Format | Best for | Opens in |
|---|---|---|
| PST | GMX mail in one Outlook file with folders intact | Microsoft Outlook |
| MBOX | Moving GMX 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 |
| Receipts, letters and records worth keeping | Any PDF viewer | |
| HTML | Reading GMX 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
Try GMX Backup Software Free
Install the demo and export 10 messages per folder. Look at the files before paying for the full version.
Download free demoTry before you buy
Free demo loads and previews your full mailbox. Only saving is capped.
| Feature | Free demo | Full version |
|---|---|---|
| Add a mailbox and load folders | 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 who keeps important mail in a GMX account.
Long time account holders
Keep years of letters, receipts and contacts before an inactive account closes.
Families and small teams
Save several accounts in one session. One licence installs on up to 5 machines.
People moving to a new mail service
Keep a local copy, then send mail on to Gmail, Outlook or Thunderbird.
Why Corbett
One licence
Covers GMX and 209+ other providers
No subscription
Lifetime price from $99
Read-only access
Nothing is deleted on the host
Direct connection
No Corbett server in between
Eight formats
Plus GMX to account transfer
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
Webmail lets a user open single messages or set up a mail app by hand. That path is slow for many folders and offers few save formats. The table shows the gap.
| Task | GMX webmail | GMX Backup Software |
|---|---|---|
| Price | Free | $99 one time |
| One message | Download it | Works too |
| Many folders | Slow, one at a time | Selected in one session |
| Narrow by date or size | Basic search only | Filters for date, size and attachment |
| Save formats | Few | PST, PDF and six more formats |
| Contacts | Manual export | Saved with the mail |
| Account switch | Gone if the account closes | Local copy kept |
| Mailbox size | Quota and sign in limits | No file size limit |
Rows tinted green are where webmail alone is enough.
A single message can come straight from webmail. Planning a move to Outlook instead? See Import PST to Outlook.
Global recognition
Users rate Corbett backup software 4.6 out of 5 across 683 reviews, and software directories list it.
CNET
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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 GMX Backup Software is handled by the team that wrote it.
Full specification
Complete source and output list for Corbett GMX Backup Software.
Goes in
GMX mailbox 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 GMX mail into a new account, use email 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 GMX Backup Software.
Pulled from 683 reviews on rating sites and customer emails. Below are three, quoted exactly.
I have used this tool to store my GMX mails to my pc, and I loved this tool. What I liked the most about this GMX Email Backup Wizard, is the multiple smart filters that enable us to back only selective important data, unlike others. Also, it maintains on disc folder hierarchy for good.
I was searching for an easy solution to back up some of my important emails from GMX to my laptop. I find this tool online and I loved the clean and intuitive interface of this GMX Backup Wizard, we can easily Filter Emails, Calendars, and Contacts and backup important data into multiple file formats.
I was always having trust issues as nowadays advertising is quite easy for brands, hence, I was looking for a solution where I can test the tool first before investing my money into it. This GMX Mail backup wizard had assured me by providing the free demo version of this tool and I was satisfied by the performance of this toolkit.
Best practice
Saved mail is only useful if it opens later. These four habits protect your GMX archive.
Keep three copies
Store the first copy on your PC, the second on a USB drive or NAS and the third offsite in storage you control.
Open a sample file
After saving, open a handful of emails from the output. A wrong path or an absent folder is cheap to fix while your login still works.
Name backups by date
Include the address and date in every backup folder name. A repeat backup starts afresh, so dated names keep older versions safe.
Back up while the login works
An inactive account can close without notice. Save mail first, check the files, then clean up the server.
Common questions
Steps, folders, addresses and file size.
Install GMX Backup Software, click Open, type the mailbox login and press Add. Preview the folders, click Export and choose the file format.
Inactive accounts get closed and the mail goes with them. Save your mail with GMX Backup Software while the login still works.
Every feature works. Saving stops at 10 emails per folder, so the trial shows real output quality on your own mail.
Yes. The software detects server address and port after login.
No. The tool sets no size limit in any format.
Yes. Select the folders and start one backup.
Yes. Add several GMX accounts and manage them from one place.
Yes. Open the Extract tab and choose email addresses.
Yes. Folders stay in the same order as in GMX.
Yes. Contacts and calendars export with the mail, and contacts can also be extracted on their own.
PST, MBOX, EML and MSG open in mail clients. PDF, HTML, CSV and TXT serve documents and lists.
Yes. Direct transfer to Gmail, Yahoo and Office 365 is built in. Steps are in Export GMX mail to Gmail and Transfer GMX mail to Outlook.
Yes. Select PST as the output and the folder tree carries over. Thunderbird users can follow Transfer GMX emails to Thunderbird.
Yes. Filters cover date range and file size next to sender, recipient, CC, name, content and attachment status.
Yes. The backup keeps data integrity and email properties.
Open GMX in a browser with the same ID and password. A working login there means the software can connect.
No. Every backup is a manual job that starts on a click and ends when the program closes. There is no timer, no service and no new-mail-only mode.
No. Your PC reads the mailbox directly. Corbett receives no mail.
No. It only reads the mailbox. Clean the mailbox yourself once the archive is checked.
Yes. Windows 11 and 10 are supported along with all older versions.
No. Only Windows is supported.
One payment of $99 buys a lifetime licence for up to 5 machines, with a 30 day refund window.
Step by step
Reading for GMX mail moves and exports.
After the export
Other mail services are on the email backup software page. Need other file types later? Try the email converter tool. To load a backup into an account, use email recovery software, and to read saved files, use free email viewer software.
Get started
Export one folder in the demo, inspect the files and buy when the output looks right. The $99 lifetime licence has a 30 day refund window.
Download free demo Purchase now
87.4 MB · Windows 11 to 7 and Windows Server 2025 to 2008 · 30 day money back