Corbett
Corbett Email Migration Tool copies one live mailbox into another account. Gmail, Microsoft 365, Outlook.com, Yahoo, Zimbra or any IMAP host can sit on either side, across 209+ services. Folders, dates and read status stay in place and filters keep every email migration focused.
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Mail moves between your providers and your PC alone. Corbett never sees your accounts or messages.
Free demo, scanned clean on VirusTotal and a 30 day refund window.
Lifetime licence from $99 Demo moves 10 emails per folder
Core features
Five screens of Corbett email migration software, in migration order.
Both ends at once
Choose your source and destination services and email migration tool finds host and port for both. If login fails, extra settings accept nonstandard servers so any mailbox with IMAP switched on connects.
Providers with OAuth 2.0 show their own consent window so passwords stay out of email migration tool. Services that want an app password work too. Load many users from a CSV list and every source and destination pair moves in one batch.
Folder selection
Your source mailbox opens as one tree with a checkbox per folder and a message count so email migration size is clear before anything starts. Inbox, Sent, Drafts, labels and nested subfolders switch on or off one by one.
Untick Spam and Trash so junk never reaches your new account. Compact view limits your list to key folders and duplicate emails are detected and left out.
Message preview
Click a message and it opens beside four analysis views. Admins use them to confirm sender, route and size before a move starts.
Content shows your mail with every address line. Message header lists From, To and Subject. Properties reports item attributes, while hex and raw message views show stored values and message code.
Selective migration
Quick Search finds a keyword from your search bar and highlights every match in yellow.
Advance Search handles two fields. All Search handles every field including calendar and date. Emails Search handles name, subject, To, Cc and content.
Filters apply before migration starts so a five year archive can move with only its last two years. That helps when your new account has a smaller storage quota. Set From and To dates, filter by sender or recipient and limit attachments by size or extension.
Destination options
On Microsoft 365, migrated mail can land in a primary, archive, shared or public folder mailbox. Archive and shared targets suit mail kept for records instead of daily use.
Options include create empty folders, include email headers and append into default folders. After migration, open your destination account and check your migrated folder.
Need a safe copy first? Open Email Backup Software before you migrate emails.
Migration vs sync
Microsoft mailbox migration documentation lists cutover, staged, IMAP and hybrid routes and notes that IMAP migration moves mail folders only. Corbett performs one clean cutover from your PC, with no tenant setup.
What sync does
Clients show one mailbox on many devices and never build a second copy in a new account.
What backup does
Backups save mail to files for later. Open Email Backup Software when you need files and not a second account.
What migration does
Email migrator copies your source mailbox into your destination in one pass, with folder structure kept on both sides.
Supported platforms
All 209+ services work as source and as destination so Gmail to Microsoft 365 migration works like Zimbra to Yahoo.
| Platform type | Popular examples | Login |
|---|---|---|
| Cloud to cloud | Gmail, Google Workspace, Microsoft 365, Outlook.com, Yahoo and iCloud | OAuth 2.0 or app password |
| Email servers | Zimbra, Kerio, MDaemon, CommuniGate, Exchange and Rackspace | Server name, port and login |
| Desktop clients | Thunderbird and Outlook | Select your profile |
| Any IMAP host | Shared hosting, ISP mail and custom domains with IMAP on | Email, password and server name |
| Microsoft 365 targets | Primary, archive, shared and public folder mailboxes | Admin impersonation or OAuth 2.0 |
| Many users | One row per user in a CSV list, source and destination in pairs | Bulk login |
Moving between IMAP accounts only? Open IMAP Migration Tool for that job.
Working process
Four steps take a live mailbox to its new account. Try them on one mailbox in free demo first.
Connect source and destination
Open email migration tool, go to Email Accounts and select Add Account. Enter your email address and password, select Find to detect your server, then select Add. Repeat for your destination account.
Select folders and filters
Your source mailbox opens as one tree. Tick folders, then set a date range, sender, subject or attachment filter to trim your email migration.
Choose your destination
Select Export, choose Gmail, Office 365, Yahoo, IMAP or another target and mark your folders. Add destination login details once.
Start your migration
Press Save and watch live progress for every folder. Your log and CSV report list what moved and what failed.
Want screenshots for every click? Follow IMAP migrator guide.
Working process
Prefer text? Open IMAP migrator guide for every click with screenshots.
Extra options
Small options that save hours on large mailbox migration jobs.
OAuth 2.0 login
Modern authentication for Gmail and Office 365
Office 365 admin access
Impersonation moves user mailboxes with one admin login
Bulk user mapping
Source and destination pairs from one CSV list
Proxy support
Connect through your own proxy server
Split PST by size
Cut large PST output into smaller files
Unicode PST
Modern PST format with a 50 GB default limit in Outlook
Merge accounts
Combine many accounts into one PST
Duplicate filter
Repeated emails move once
Auto retry
Dropped connections resume from your last message moved
Live progress
Watch every folder as it moves
Log and CSV report
See what moved and what failed
USB and NAS targets
Save mail files to external drives and network storage
Quick and advance search
Find emails by keyword before migration
Include email headers
Keep full header data with every message
Append to default folders
Merge migrated mail into existing folders
Choose output
Email migration software saves to eight file formats. Match format to what you plan to do with your copy.
| Format | Best for | Opens in |
|---|---|---|
| PST | One file per mailbox with folders preserved | Microsoft Outlook |
| MBOX | Moving mail to a free email client | Thunderbird and Apple Mail |
| EML | One file per email, quick to search | Windows Mail and most email clients |
| MSG | Single messages kept as Outlook items | Microsoft Outlook |
| Legal files, audits and printing | 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 | Any text editor |
Free demo
Test Email Migration Tool on a Live Mailbox
Install free demo, connect both accounts, select one folder and confirm mail arrives. Free demo moves 10 emails per folder so your destination is quick to check.
Download free demoTry before you buy
Free demo connects, opens and previews your full mailbox. Only email migration is capped.
| Feature | Free demo | Full version |
|---|---|---|
| Connect accounts and load mailboxes | Yes | Yes |
| Preview, filter and analysis views | All available | All available |
| Emails moved per folder | 10 | Unlimited |
| Mailbox size and user limit | Move stops at 10 per folder | None |
| Price | Free | From $99 one time |
Use cases
Anyone who must migrate emails without losing history.
People switching provider
Migrate emails from Yahoo, AOL or an old ISP to Gmail or Outlook.com and keep years of mail.
Teams after an acquisition
Load source and destination pairs from a CSV list and migrate every employee mailbox in one batch.
Businesses changing domain
Move mail from your old domain to your new host. Email migrator retains folders, dates and read status.
Admins retiring a server
Move Zimbra, Kerio, MDaemon or CommuniGate mailboxes to Microsoft 365 before a server shuts down.
Agencies and consultants
Use email migration software for many client accounts and keep every account in its own destination.
Compliance teams
Migrate old mail into an archive or shared mailbox on Microsoft 365 for records and audits.
Why Corbett
No subscription
Lifetime price from $99
Safe source mailbox
Email migration never deletes mail at source
Direct connection
No Corbett server in between
209+ services
Any source paired with any destination
No size limit
Any mailbox size or user count
Auto server detection
Host and port found for you
Smart filters
Date, sender, subject and size
30 day refund
Refund window after purchase
Before migration
Email migrator copies a mailbox from one live account into another. Here is what that includes and where it stops.
| Capability | Supported | What it means |
|---|---|---|
| Single cutover | Yes | Switch providers, close an old account or move a domain in one email migration job |
| Folder structure and dates | Yes | Folders, dates and read status arrive as they were |
| Contacts and calendars | Where your source holds them | Mail, contacts, calendars, tasks and notes travel together |
| Source mailbox | Read only | Mail is copied out, never moved out |
| Scheduled or incremental sync | No | A second session copies your full selection again |
| Tenant settings | No | Security policies, admin settings and licence assignments stay put |
Manual or tool
Forwarding rules and drag and drop between two accounts work for one small mailbox. Here is where manual email migration stops.
| Task | Manual method | Email Migration Tool |
|---|---|---|
| Cost | Free | From $99 one time |
| One small folder | Drag between two accounts | Works too |
| Large mailbox | Times out on big folders | One session for every folder |
| Message properties | Lost in transit | Headers and hierarchy kept |
| Many users | Repeat for every login | One batch from a CSV list |
| Filters | Client rules only | Date, sender, subject, size |
| Server address | Looked up by hand | Detected on its own |
| Failed items | Spotted and copied again by hand | Auto retry with a log and CSV report |
| Duplicates | Created on every retry | Detected and left out |
Manual moves work in two rows only.
Global recognition
Users rate Corbett email migration tool 4.6 out of 5 from 683 reviews, with listings in these software directories.
CNET
Download.io
UpdateStar
TopSoftware Advisor
SaaSHub
Uptodown
Specifications
Download details
System
Supported editions
Windows 11 (64 bit), 10, 8 and 7 in 32 bit or 64 bit, plus Windows Server 2016, 2012 R2 and 2008.
Start it with Run as Administrator.
Corbett has built Windows email utilities since 2020. Setup trouble and first use questions go to our support desk.
User testimonials
Email migration tool earns 683 reviews on software index sites and customer feedback.
Collected across 683 reviews from software index sites and customer feedback. Three reviews below are unedited.
This is the best email migration tool I've used so far. I found this solution while browsing the web. The software supports and allows you to transfer files from over 100 different email services. I would recommend this tool for its excellent performance.
Due to some office purpose, I needed to migrate emails from AOL account to my main email account. After searching for the solution, I came across this email migration tool that did the entire task in a fraction of the time.
My company recently acquired a small business with 50 personalized email addresses. We needed to take control of all the information for the audit. The Email Migrator helps us to migrate data from custom domain to our facility with complete information.
Before migration
Three short checks keep your email migration clean.
Gather both logins
Have your email address, password, server name and port number for your source and your destination ready. Host and port fill in on their own for most accounts.
Create app passwords
Gmail, Yahoo and iCloud block normal passwords when two step verification is on. Create an app password first, as Google app passwords help explains.
Create destination mailboxes
Add every user to your new provider first. Email migrator copies into accounts that already exist.
Best practice
Your email migration only helps if your mail arrives in full. Four habits keep your data safe through it.
Backup first
Save a copy of your source mailbox before you start. Keep 3 copies on 2 types of media with 1 copy off site.
Start with a test mailbox
Move one small account first and open a few messages at your destination. Catch a wrong folder before a large job.
Plan one cutover
There is no scheduler or incremental mode. Choose a quiet window and set a From date for any late mail.
Keep source until checked
Leave your old account live until folder counts match. Deleted accounts cannot be recovered once your provider purges them.
Common questions
Steps, platforms, limits and licence answers for email migration.
Email migration tool signs in to a source mailbox and copies emails, attachments and folders into another account. Corbett Email Migration Tool works between 209+ services on Windows.
Open Email Migration Tool, go to Email Accounts and select Add Account. Enter your source email address and password, select Find, then Add. Preview folders, select Export, choose your destination, add its login details, mark folders and select Save. Free demo lets you test every step first.
Any pair from 209+ services works, including Gmail, Google Workspace, Microsoft 365, Outlook.com, Yahoo, iCloud, Zimbra, Kerio, MDaemon, CommuniGate, Exchange, Rackspace and any IMAP host. Source and destination share one list.
Yes. Zimbra to Microsoft 365, Google Workspace to Gmail, Rackspace to Outlook.com and an old IMAP host to a new one all work. Email migration software treats source and destination alike.
No. Sync mirrors one mailbox across devices. Migration copies mail into a new account. Microsoft mailbox migration documentation describes cutover, staged, IMAP and hybrid routes for that job.
Yes, where your source account holds them. Contacts, calendars, tasks and notes travel with your mail. Microsoft mailbox migration documentation notes that its IMAP route moves mail folders only. Security policies, admin settings and licence assignments stay where they are.
No. Your source is read only. Mail is copied out, never moved out so your old account retains everything until you close it yourself.
Yes. Put one row per user in a CSV file, with your source address in one column and your destination in another. Email migration tool matches every pair and saves a CSV report when finished.
Yes. On Microsoft 365 your destination can be a primary mailbox, archive mailbox, shared mailbox or public folder. Select a type when you connect your destination account.
Yes. Gmail and Office 365 sign in with OAuth 2.0 on your provider consent screen so passwords stay out of email migration tool. Services that want an app password work too.
Yes when two step verification blocks your normal password. Create an app password with your provider and type it in place of your password. Google explains app passwords in Google app passwords help.
Yes. Set From and To dates in filters and email migration tool migrates only emails inside that range. Filters by sender, recipient, subject and attachment add more control.
Yes. Quick Search finds a keyword from your search bar and highlights matches in yellow. Advance Search offers All Search for every field including calendar and date and Emails Search for name, subject, To, Cc and content.
Yes. Folder hierarchy, dates, headers and read status arrive at your destination as they were in your source.
No. Duplicate detection compares messages before migrating and leaves out ones already present. On a partly filled mailbox, narrow your folder selection or date range first to save time.
No. There is no scheduler and no incremental mode so a second session copies your full selection again. Duplicate detection stops repeat messages landing twice so plan your move as a single cutover.
Auto retry tries failed items again and a dropped connection resumes from your last message moved. Your log and CSV report list what moved and what failed.
Yes. Export to PST, MBOX, EML, MSG, PDF, HTML, CSV or TXT. Outlook sets a 50 GB default limit per Unicode PST, as Microsoft PST file size limits documentation explains so splitting makes files quick to open.
No. Your PC connects to both providers and moves mail between them. Corbett never holds or forwards a message.
Yes. Save a copy of your source mailbox first. CISA backup business data guide recommends tested backups of business data.
Free demo connects both accounts, opens your full folder tree and gives you every filter and preview. Migration stops at 10 messages per folder, enough to test your route before you buy.
Windows 11 (64 bit), 10, 8 and 7, plus Windows Server 2016, 2012 R2 and 2008.
Personal licence works on 5 machines, Business works on 25 and Enterprise works on 100. All three are one time payments with lifetime validity.
Yes. Refunds are accepted within 30 days of purchase.
Migration routes
Every page below handles one email migration route and answers questions it raises.
Migrate to Office 365
Migrate to Gmail and others
Need mail saved to files instead? Use Email Backup Software or Email Archiving Software. Push a saved file into a live account with email recovery software, convert files with email converter tool and open files free in email viewer software.
Get started
Test Email Migration Tool on one mailbox first. Full access is from $99 in a single payment and refunds are open for 30 days.
Download free demo Purchase now
87.4 MB · Windows 11 to 7 and Windows Server 2025 to 2008 · 30 day money back